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Habors to my sugestion:

# -25 - Falésias - Sul do Chile
# 0 - Costa Plana - Barcelona
# 25 - Baía - Palma de Maiorca
# 50 - Porto Fluvial - Sevilha
# 75 - Baía Profunda - San Sebastián
#100 - Estuário Fechado Muito Defensável - Ferrol

South to North:

Rio Grande - 75
Pelotas - 50
Camaquã - 0
São Jerônimo - 50
Porto Alegre - 100
São José - 25
Conceição do Arroio (Osório) - 0
Criciúma - 0
Laguna - 75
Desterro (Florianópolis) - 25
Blumenau (at Itajaí) - 50
São Francisco - 50
Guaratuba - 75
Paranaguá - 100
Cananéia - 50
Iguape - 50
Itanhaém - 0
São Vicente - 100
São Sebastião - 0
Paraty - 25
Itaguaí (at Mangaratiba) - 75
Rio de Janeiro - 100
Jacutinga - 100
Magé - 100
Niterói - 100
Cabo Frio - 100
Capivary - 25
Macaé - 0
Campos - 0
Nossa Senhora do Patrocínio (Itapemirim) - 0
Guarapari - 50
Espírito Santo (Vitória) - 100
Serra (at Vitória) - 75
Coutins (Linhares) - 50
São Matesu - 0
Cricaré - 0
Viçosa - 0
Caravelas - 50
Prado - 0
Porto Seguro - 100
Canavieiras - 0
Olivença - 0
Ilhéus - 100
Maraú - 100
Camanu - 100
Cairu - 100
Jaguaripe - 50
Itaparica - 100
Salvador - 100
Cachoeira - 100
Santo Amaro - 100
Mata de Saõ João - 0
Conde - 0
São Cristovão - 50
Aracajú - 50
Japaratuba - 0
Penedo - 50
Alagoas - 50
Maceió - 25
Porto Calvo (at Japaratinga) - 50
Rio Formoso - 50
Recife - 50
Olinda - 0
Itamaracá - 50
Paraíba (João Pessoa) - 50
Mamanguape - 0


I'm tring to be as cautious as possible, but every Brazilian city has a wide and protected mouth. What to do?

Will be updated.
 
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Hi. Just wanted to let you know that we had been reading this thread prior to today's Tinto Maps. As the hot topic is the extension of Mata Atlàntica, these have been my words about it:



This means that its rework will be as good as the feedback we receive, so we kindly ask and encourage you to help us portray more adequately the region by posting your feedback and proposals, with sources and maps if possible, in the Tinto Maps thread (although it's perfectly fine if you discuss it first, in order to share knowledge and refine your proposal, OFC!). :)
Hey Pavía, I'm not the one you answered to but I'd like to say that the work you guys did on the map is truly impressive, and I can see the effort put into recreating the region, cultures, language and religions. I also understand how that, at first glance, making the Atlantic Forest a wasteland, mimicking the treatment given to the Amazonian Forest, might seem like a sensible choice. However, I believe the premise behind this decision was mistaken, as the Atlantic Forest isn’t analogous to the Amazonian Forest. That is, I don’t think turning most of the former Atlantic Forest into a wasteland is the most accurate choice as the hardships transversing the Amazon are not the same as those of transversing the Atlantic Forest.

Historically, many of the regions now marked as wastelands were not uninhabitable expanses but rather dynamic areas with significant activity, including the establishment of colonies and historical routes. These routes included those used by groups that could be described today as paramilitary or pre-military organizations, hierarchical entities of organized violence, which in game terms will probably be represented as military units.

Making those regions untraversable seems at odds with the spirit of some other decisions you guys have made, such as the treatment of the Darien Gap. As a result, many colonies and historical routes where quasi-armies passed (for example, bandeirante routes: https://atlas.fgv.br/marcos/bandeiras-e-bandeirantes/mapas/bandeiras-e-entradas) are poorly represented. While it’s fair to reflect the challenges of traversing the region, completely erasing its historical role and potential for development seems to oversimplify its importance.

I understand this may sound like a repetitive request but I truly believe it’s for the best.
 
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I'm updating the list at the time.
Ok! While you're doing that, i feel it's interesting suggesting for Minas Gerais to be made into an Area and uniting Rio de Janeiro and Espirito Santo into one Area? I made a quick edit, showing how it would look.



Habors to my sugestion:

# -25 - Falésias - Sul do Chile
# 0 - Costa Plana - Barcelona
# 25 - Baía - Palma de Maiorca
# 50 - Porto Fluvial - Sevilha
# 75 - Baía Profunda - San Sebastián
#100 - Estuário Fechado Muito Defensável - Ferrol

Rio Grande - 75
Pelotas - 50
Camaquã - 0
São Jerônimo - 50
Porto Alegre - 100
São José - 25
Conceição do Arroio (Osório) - 0
Criciúma - 0
Laguna - 75
Desterro (Florianópolis) - 25
Blumenau (at Itajaí) - 50
São Francisco - 50
Guaratuba - 75
Paranaguá - 100
Cananéia - 50
Iguape - 50
Itanhaém - 0
São Vicente - 100
São Sebastião - 0
Paraty - 25
Itaguaí (at Mangaratiba) - 75
Rio de Janeiro - 100
Jacutinga - 100
Magé - 100
Niterói - 100
Cabo Frio - 100
Capivary - 25
Macaé - 0
Campos - 0
Nossa Senhora do Patrocínio (Itapemirim) - 0

Will be updated.

Some Harbors:

Fortaleza - 50
Acaraú - 25
Aquiraz - 35
(I'm not good with values, so if you think these should be something else, do say so)
 

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Ok! While you're doing that, i feel it's interesting suggesting for Minas Gerais to be made into an Area and uniting Rio de Janeiro and Espirito Santo into one Area? I made a quick edit, showing how it would look.





Some Harbors:

Fortaleza - 50
Acaraú - 25
Aquiraz - 35
(I'm not good with values, so if you think these should be something else, do say so)
Sorry, but I fink:

Fortaleza - 25
Acaraú - 0
Aquiraz - 0

Aboult Minas Gerais, it's more modern building, that would have 74 locations, so much.
 
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Hey Pavía, I'm not the one you answered to but I'd like to say that the work you guys did on the map is truly impressive, and I can see the effort put into recreating the region, cultures, language and religions. I also understand how that, at first glance, making the Atlantic Forest a wasteland, mimicking the treatment given to the Amazonian Forest, might seem like a sensible choice. However, I believe the premise behind this decision was mistaken, as the Atlantic Forest isn’t analogous to the Amazonian Forest. That is, I don’t think turning most of the former Atlantic Forest into a wasteland is the most accurate choice as the hardships transversing the Amazon are not the same as those of transversing the Atlantic Forest.

Historically, many of the regions now marked as wastelands were not uninhabitable expanses but rather dynamic areas with significant activity, including the establishment of colonies and historical routes. These routes included those used by groups that could be described today as paramilitary or pre-military organizations, hierarchical entities of organized violence, which in game terms will probably be represented as military units.

Making those regions untraversable seems at odds with the spirit of some other decisions you guys have made, such as the treatment of the Darien Gap. As a result, many colonies and historical routes where quasi-armies passed (for example, bandeirante routes: https://atlas.fgv.br/marcos/bandeiras-e-bandeirantes/mapas/bandeiras-e-entradas) are poorly represented. While it’s fair to reflect the challenges of traversing the region, completely erasing its historical role and potential for development seems to oversimplify its importance.

I understand this may sound like a repetitive request but I truly believe it’s for the best.
An elegant solution, but simultaneously a very complicated one to implement, would be something I'd call "dynamic wastelands", where, depending on the "cultural technology" of a society, certain locations are inaccessible. This is especially egregious in jungles and the steppes, where the game's representation of them is more that they're these almost uninhabitable, terrible places - and they are, to some. Russian infantry will have a bad time in the Kazakh steppe - but for the Cossacks, it's just slightly more unpleasant.

This would actually introduce asymmetry to gameplay. Why should the Kongo not be allowed to move their troops around central Africa? They're familiar with this biome. And meanwhile their European attackers are forced to stick to the coast, you may simply outmaneuver them by utilizing lands that are, to the Europeans, wastelands.

The Amazon is very similar - I say, do away with it as a wasteland entirely. We already know that it was considerably more populated than previously believed, and hosted agrarian societies that should be, at the very least SoPs (caveat: we have no idea who they actually were). Same thing for the Atlantic forest - it should be accessible to the natives, but not the outsiders (until they adapt).

After all, why would a South American jungle tribe not be able to cross the Darien? It's not any different than the rest of the Colombian Pacific littoral. What to the highlander or the European is a putrid jungle not worth doing anything with, to a lowlander polity would just be an area of forest.

This would make the game very realistic, and very dynamic. I imagine it could be done by giving each location something akin to Victoria 2's Life Rating, but multidimensional based on the terrain and climate values, where some states/cultures get pre-unlocked technology allowing them to exploit this. If you cheese an African playthrough and conquer Europe, what is "wasteland" will be different to you than what it will be to Europeans.
 
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Sorry, but I fink:

Fortaleza - 25
Acaraú - 0
Aquiraz - 0

Aboult Minas Gerais, it's more modern building, that would have 74 locations, so much.
Harbor are fine.

Minas could be a bit tweaked to be smaller in sizer or density, but it's absence as an Area is a bit problematic, it's a deeply relevant state during the period of the game, even more than Espírito Santo or Porto Seguro.
 
I figured I would post this here before posting it in the main SA thread in order to get some extra feedback before.

Going directly to the point, here's what I propose for the biomes in Brazil (more details below):

1734801185989.png


1 - Woods
2 - Forest
3 - Desert
4 - Grasslands
5 - Jungle

Main sources:
Brazillian map of biomes (sadly, couldn't find a more detailed one)
More detailed Caatinga map of biomes (thank you so much for that, Ulfreig)

Note that imprecisions could arise from the fact that I just had those maps side by side with the location map of Paradox and just guessed where the borders of each biome would be.
I would also like to note that Paradox's map is not at all that different, so their sources were clearly good. The main differences will arise from me in some points wanting to be somewhat overzealous to represent a few things (like the Lençóis Maranhenses, which inclusion could be debatable), and from what I believe to have been a core misunderstanding of Brazillian biomes.
One of the more obvious one is the Mata Atlântica, but since the issue here is mostly related to the Wasteland areas and not to the representation of the forest cover itself, I will let other people to comment on that, as my focus in this post is just on the biomes themselves.
The other issue is with the Cerrado biome. I can see how the fact that it is a Savanah-type biome would make one want to characterize it as Grasslands, but it's far from that. The Cerrado is characterized by a dense concentration of medium-sized bushes, which often make it as hard to traverse as any other Brazillian forests. I have therefore opted to suggest it be represented as Woods, with Forests being present in the transition zones with Jungle areas, and Grasslandas in the transition zones with the Caatinga. I have also treated those areas where it's not clear to me what biome prevails over the other as transition zones (which can be specially noted in the state of São Paulo and Goias).
Regarding the Caatinga, I'm not sure if the issue with how it was represented came from a misunderstanding of how it differs from the Cerrado, or of how diverse it can be. In any case, I have opted to represent it as a mix of Sparse and Grasslands, with the Grasslands being more present in those areas which the indicated source for the Caatinga biome pointed as being majorly covered by "Decidius Thorn Woodland", with little presence of other types of vegetation coverage. Grasslands were used elsewhere, and Woods in the transition areas.
The Pampas I have kept mostly the same way as Paradox - they are as stereotypical a Grassland region as you can get.
I have touched little in the Amazon as well, with the exception of the transition zones with the Cerrado, which I think would be best represented as Forest (something that Paradox has done, but not to the extend I think the presented sources point to). I do have a vague memory of the Marajó island having a more specific biome configuration, though I couldn't find any sources on that. Would appreciate if someone could add to it.
Finally, regarding the Pantanal, I have not at all touched it, as it is characterized as Wasteland and I don't see much reason to change it, since it was neither inhabited by large indegenous people groups (at least afaik), used to transport large armies or settled by the Europeans in the game's time period.
 
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I've posted this on the South America map reveal, but I'll be posting here as well, with some addons
I think that the Paraíba location should have a suitable natural harbour. Our colonisation is very unique in the sense that our capital and first city (today's João Pessoa, then Filipéia de Nossa Senhora das Neves) was colonised from the river Paraíba, not from the coast. To this day, one of the best ports in the Northeast is situated on the Paraíba river estuary at Cabedelo, where the river widens and has ample space for ships of all sizes.

Filipéia was first colonised in 1585, with the construction of the Fort of Santa Catarina in today's Cabedelo at the year of 1589. There were plans since Pedro II's reign to build a commercial harbour at Cabedelo, which denotes the suitability before modern harbour-building techniques.

Recife/Olinda in Pernambuco is also a major commercial port since the early days of the Portuguese colonisation, and underwent Dutch colonial/military occupation for a good time, serving as the capital of Dutch Brazil during the 1600s. It is both strategically located at the coast fo the Northeast, being a hub for the Triangle Trade and also an entrepot for those voyages toward São Salvador and the rest of Brazil. The coast of Pernambuco also hosts the major harbour of Suape, some 40 clicks south of Recife, further showcasing the suitability of the location of the Caxanga/Recife location.

If I were to judge the suitability of each, I'd go for 25-50 for Paraíba (Parahyba in older orthography) and 75 for Recife.

History of Paraíba - Wikipedia

Porto de Cabedelo – Wikipédia, a enciclopédia livre

https://www.portservices.com.br/assets/docs/Cabedelo.pdf
https://en.wikipedia.org/wiki/Dutch_Brazil
1734804044716.png
 
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Postei isso na revelação do mapa da América do Sul, mas postarei aqui também, com alguns complementos
Acho que a localidade da Paraíba deveria ter um porto natural adequado. Nossa colonização é muito única no sentido de que nossa capital e primeira cidade (hoje João Pessoa, então Filipéia de Nossa Senhora das Neves) foi colonizada a partir do rio Paraíba, não da costa. Até hoje, um dos melhores portos do Nordeste está situado no estuário do rio Paraíba, em Cabedelo, onde o rio se alarga e tem amplo espaço para navios de todos os tamanhos.

Filipéia foi colonizada pela primeira vez em 1585, com a construção do Forte de Santa Catarina, no atual Cabedelo, no ano de 1589. Havia planos desde o reinado de D. Pedro II para construir um porto comercial em Cabedelo, o que denota a adequação diante das técnicas modernas de construção de portos.

Recife/Olinda em Pernambuco também é um importante porto comercial desde os primeiros dias da colonização portuguesa, e sofreu ocupação colonial/militar holandesa por um bom tempo, servindo como capital do Brasil holandês durante os anos 1600. Está estrategicamente localizado na costa do Nordeste, sendo um centro para o Comércio do Triângulo e também um entreposto para aquelas viagens em direção a São Salvador e o resto do Brasil. A costa de Pernambuco também abriga o principal porto de Suape, a cerca de 40 cliques ao sul de Recife, demonstrando ainda mais a adequação da localização da localidade Caxanga/Recife.

Se eu tivesse que julgar a adequação de cada um, eu diria 25-50 para Paraíba (Parahyba na ortografia antiga) e 75 para Recife.

História da Paraíba - Wikipédia

Porto de Cabedelo – Wikipédia, uma enciclopédia livre

https://www.portservices.com.br/assets/docs/Cabedelo.pdf
https://en.wikipedia.org/wiki/Dutch_Brasil
Yes, Paraíba would have 50 and Recife I don't know, because Capibaribe river look like be shallow at the mouth, turning the islands unsable to turn it a good port, as well many breakwaters were built.
 
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Yes, Paraíba would have 50 and Recife I don't know, because Capibaribe river look like be shallow at the mouth, turning the islands unsable to turn it a good port, as well many breakwaters were built.
You could consider the suitability of Olinda's harbour since both cities share the same location in-game (not to mention they're the same conurbation nowadays), besides the fact they were our major harbour in the Northeast, excluding Salvador, for the timespan of the game.
1734805446485.png
1734805498083.png
 
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Speaking of Recife/Olinda, I've overlaid the map with google maps, and they look to be on a very odd location, sitting right between Caxangá and Yapuata, not being propely the center of any of them. Quite the oversight.

1734828999160.png


Yes, Paraíba would have 50 and Recife I don't know, because Capibaribe river look like be shallow at the mouth, turning the islands unsable to turn it a good port, as well many breakwaters were built.
No need for concern (link)
1734829231471.png

TL: Recife Port: Recife's port is managed by the government of the Pernambuco State. It is located in the city of Recife, on the margins of the Capibaribe and Beberibe rivers, which flows into the Atlantic ocean. The first slave port in the Americas, the then-called "Port of Pernambuco" was the main outlet for sugar and brazilwood for the Captaincy of Pernambuco, the richest captaincy in Colonial Brazil. Used since 1535, it was also the birthplace of the town of Recife.

Adding to that, from the EN article:
1734829864264.png


I'll be posting this on the feedback thread as well.
 
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Yes, Paraíba would have 50 and Recife I don't know, because Capibaribe river look like be shallow at the mouth, turning the islands unsable to turn it a good port, as well many breakwaters were built.
Also, the mouth of the Capibaribe isn't shallow, we constantly have cruiser and cargo ships docked there nowadays.
1734832223322.png
1734832238126.png
1734832271700.png


The main trade port today is in Suape, which supports a modern volume of cargo, but for the time period of EU5, it was in Recife indeed.
 
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Well, let's look the locations names. This table will be updated.

1-SÃO PAULO

Name Nowdays (PT)Old Full Name (PT)Other Old Name (PT)Tupi Name
(Em PT)
Tupi Name ObservationOther Observation
São PauloSão Paulo dos Campos de Piratiinga-Pirá-tininga
(Piratininga)
--
Mogi das CruzesSantana de Mogi das Cruzes-Mboîa
(Mogi-M'boi)
--
Santo Amaro--Yaribá-tyba
(Jurubatuba)
Means the river were is the location.Today a neigborhood.
Santa Isabel--Aru-îá
(Arujá)
Means other city in the same location.-
São Roque--Karumbé'yMeans the river were is the location.-
AtibaiaSão João Batista de Atibaia-Ty-baia
(Atibaia)
Most likely conjecture.-
Bragança PaulistaConceição do Jaguari-Îaguara'y
(Jaguari)
-Paulista was add to differentiate from the location of the same name in Pará.
Santana de Parnaíba--Pan-n-eeí-boAccording to the city hall website. I was unable to confirm the etymology.-
JacareíNossa Senhora da Conceição da Paraíba-Îakare'y
(Jacareí)
--
TaubatéSão Francisco das Chagas de Taubaté-Taba-ybaté
(Taubaté)
Name of ancient village-
PindamonhangabaNossa Senhora do Bonsucesso de Pindamonhangaba-Pindá-monhang-aba
(Pindamonhangaba)
--
LorenaNossa Senhora da Piedade-Guâ-upa-caréName of the lagoon there, by which the natives identified it.

In Puri (other native language) Ipacaré
-
CunhaNossa Senhora da Coneição de Cunha-Indaîá
(Indaiá)
Means the mountain near city.-
ParaibunaSanto Antônio de Paraibuna-Pará-y-b'una--
São Sebastião--Mboîa-su-kangaMeans the river wew is the city.-
São Vicente--Gu-ai-ógOne of the possible spellings. It refers to the island of São Vicente, named as such by the natives.-
ItanhaémNossa Senhora da Conceição de Itanhaém-Itá-nhe'eng--
CananéiaSão João Batista de Cananéia-Mara-tayamaFirst name registered for the location. Supposedly, it references a native leader.-
EldoradoNossa Senhora da Guia de XiriricaXiriricaXiri'rika-It was known as Xiririca until its name was changed to Eldorado, in reference to the legend, ignore the modern name.
SorocabaNossa Senhora da Ponte de Sorocaba-Sorok-aba--
Capão BonitoNossa Senhora da Conceição do ParanapanemaCapão Bonito do ParanapanemaParaná-panema--
ApiaíSanto Antônio das Minas de Apiaí-Apya'y--
ItapevaItapeva da FaxinaFaxinaItá-peba--
ItapetiningaNossa Senhora dos Prazeres de Itapetininga-Itá-peba-tiningaThere is no exact consensus on this.-
Itaporanga
(Rio Verde at map)
São João Bastita do Rio VerdeItaporangaItá-porang-a--
Botucatu--Ybytyra-katu--
São Pedro do TurvoSão Pedro de Campos Novos do Turvo----
Lençois Paulista--Ubá-tetamaThis name was given later, for a limited period of time.Paulista was add to differentiate from the location of the same name in Bahia.
BauruEspírito Santo da Fortaleza-Mbai-yurúI was unable to confirm the etymology.-
AraraquaraSão Bento de Araraquara-Arara-kûara--
Tanabi--Tanambi--
Some data about list:
You can leave out apostrophes and dashes, they only separate the particles that form words, although accents are relevant. Itá = stone/mountain - Pará/Y/Iy = water/river Kûara = burrow - Mboîa = snake - Tyba = grouping - more here.
 
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RIO DE JANEIRO

Name NowdaysOld NameOther Old NameTupi NameTupi Name noteOther note
ParatyNossa Senhora dos Remédios de Paratiy-Parati'y--
ItagauíSão Francisco Xavier de Itaguaí-Itá-kûa'y--
Rio de JaneiroSão Sebastião do Rio de Janeiro-Gwa-nã-ba'raOne of possible name's interpretation to Guanabara the bay that was called in portuguese "Rio de Janeiro"-
Belford RoxoSanto Antônio de JacutingaIpueras'Y-puér-aIt's named 'Y-ûasu at the map, that is the neigborhood city names (Nova Iguaçú) but I've find a name to the proper location.-
Magé--Magêpe-mirímThis name was give by portugueses and don't mean a geographic fact, but "little chief". By corruption of the word becames Magé.-
BaependiSanta Maria de Baependi-Mba'epina'yOne of possible etimologies.-
ItajubáBoa Vista de Itajubá-Itá-îybáOne of possible etymologu-
Camanducaia--Komandá-kaî-a--
Pouso AlegreBom Jesus de Matozinhos do Mandu-Mandi-yu--
JacuíSão Carlos do Jacuí-Îaku'y--
MuriaéSão Paulo do Muriaé-Meruim-huIt's a Puri (also caled Coroado) word. One of possible etimology. Not Tupi.Note: Puri place names are very rare.
BonfimBonfim do Paraopeba-Pará-popeba--
ItapecericaSão Bento do Tamanduá-Itá-pewá-siríka--
PiumhiNossa Senhora do Livramento do Piui-Piawa'yPiuí like to be a corruption of Piauí, following historical maps.-
MacaéSão João de Macaé-Mokaîe--

ESPÍRITO SANTO

Name NowdaysOld NameOther Old NameTupi NameTupi name noteOther note
GuarapiriSanta Maria de GuaraparimAldeia dos ÍndiosGuará-parim--
Afonso CláudioSão Sebastião do (Alto) Guandu-NandúIt is most likely that the name Guandu (in the case of Espírito Santo) comes from the rhea bird, nandú in Tupi.-
Conceição da BarraBarra de São MateusBarra do CricaréKiri-kerêI can't confirm the name.-
ManhuaçuSão Lourenço do Manhuaçu-Aman'y-ûasu--
CaratingaSão João do Caratinga-Aka'ratin'ga--
Itanhomi--Itá-nhomima--
Itaobim--Itá-oby--
Itabira
(Wrongly called Itatira at map)
Itabira de Mato Dentro-Itá-byra--
PitanguiVila Nova do Infante das Minas de Pitangui-Pitanga'y--
Ipatinga--Upaba-tingauncertain toponym in fact-
MatipóSão João do Matipó-Abati-poóThe truth is that we have lost the etymology of the name. The official and traditional version says that it would mean powdered corn (Match-poo), which makes no sense grammatically or historically. Corn in Tupi corresponds to Abati, which phonetically could easily be corrupted as "mati", however, "pó" means hand or vine which would not make sense, however "poó" in Tupi corresponds to a verb that indicates harvest. This way we can construct, without damaging tradition or etymology, the possible original word without damaging grammar.-
MutumSão Manuel de Mutum-MutũMeans a bird.-
PirangaGuarapiranga-Gûará-pirang-aThe original native name was the most long one.-
CaetéVila Nova da Rainha-Ka'a-eté--
AnchietaReritiba-Reri-tyba--
 
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1000293873.jpg

As you can see, it's an improvised map. Having locations of similar sizes and navigable rivers in addition to the locations within the borders of the map drawn. The extension of locationd by the rives would happen if there are others locations at neigborhoods areas. As well it has the arqueological sities at locations (less one or two to inner at florest)
 
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1000294464.jpg

Well its the preview to Leste do (Grão) Pará feedback. It don't inclued around 5 arqueological areas because it would conect Pará to Mato Grosso, ignoring the non-navigability of the rivers. Maybe some crossings like Saara?
 
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1000294738.jpg

The map, where the light blue locations are corridors to the navegable Araguaia and Juruá rivers, as well the north of Roraima, that isn't florested and could have locations. Considerate that Rorainópolis location on the old map is bad named.
 
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So, I got some doubts/need of validation about the Madrid and San Ildefonso treaty lines. Don't know which thread is the best one, this, FleetingRain's one or the tinto maps, but I chose this one. I made proposed lines for the treaties and I wanted to share to validate my choices.

I tried to read the treaties, but it was hard to understand, so I took the description of Braziler as a base.
I can help you with this. The borders of the Treaty of Madrid, which the map tries to represent (1750), are as follows: From the south, by the watershed between the rivers that go to the Mirirm/Patos lagoon and that go to the Patra river (Uruguay river and sea) until reaching the source of the Ibicuí river, following it to its mouth in the Uruguay river and then up the Uruguay river to the Peperi-Guaçu river and then up the latter to its source, going to the source of the Santo Antônio river and down the latter to its mouth in the Iguaçu river and then down the Iguaçu river to the Paraná river and then up the Paraná river. All this as it appears on the map. Until a certain point the treaty says that the border should follow a river called Iguery that was never identified in the field, with several rivers being pointed out as the border (from south to north; Carapá, claimed by Portugal; Iguatemi, proposed by the demarcator; Ivinhema, claimed by Spain. Although the border was never demarcated, the Ivinhema River best meets the criterion of volume expressed in the treaty and was the de facto border until Paraguay lost the war to the Triple Alliance) and then by a line as straight as possible (according to geography) by the Corrientes River, which also does not exist (the following rivers were proposed as alternatives: Ypané, by the demarcator, but soon discarded because it violated the principle of uti possessis of the treaty (some Spanish locations would be lost to Portugal); Miranda, claimed by the Spanish, but discarded (area explored by the Portuguese); Apa, proposed by the Portuguese and applied in the defeat of Paraguay. Branco, claimed by the Spanish and de facto border (the Paraguayan city of Laguna was there). The posted map makes a mistake in drawing the border at the time through Apa and not through Branco (the western part of the border with Paraguay). After that, the border went up the Paraguay River to the point where a river (I don't remember the name, I can look it up tomorrow) flows into Paraguay, from there in a straight line to the source of the Guaporé River (the map doesn't show it like this, because such a line would create a padalhe) and this up to the point where if you draw a line to the west you reach the source of the Javari River and this down to its mouth in the Amazon and then down the Amazon to the westernmost mouth of the Japurá River (the map shows the main river further east) and then up Japurá to the mouth of the Apapóris River. From this point on, the treaty leaves the responsibility for defining the border to the demarcators (but the border was never demarcated) more or less in these terms: along rivers, mountains and lakes in the straightest direction north as possible (we usually use a straight line on maps), until reaching the watershed between the Amazon and Orinoco basins, as far as the border between the two countries (Portugal and Spain). Although the treaty does not say that the north of Roraima is left out, this is what is understood (by those who make these maps) when the treaty says "as straight as possible". The final border, which is with France, follows the Araguari River and corresponds to another treaty...

Treaty. After thia treaty was replace by the Santo Idelfonso treaty, with the same term (incluinding fake rivers) less the Rio Grande do Sul borders, which follows the current border from the sea to the Miririm lagoon and then the Piratini River (here the treaty is actually as ambiguous as possible) to the watershed between the Jacuí and Uruguay basins and then along the Guarita River, from its source to its mouth in Uruguay, otherwise the same as that of Madrid. In fact, this treaty definitely places the north of Roraima as part of Brazil, incluiding what was take by UK in Pirara question.

The changes in the border until reaching the current one were: The border of Rio Grande do Sul was agreed between the local government and the Viceroy of the Plata and later conformed when (I think) Uruguay gained independence. Regarding the border with Paraguay, I have already said so. With Bolivia, Brazil signed a treaty, while it was still fighting the Paraguayan War, taking some land (multiple reasons). Later, Bolivia ceded the east of Acre (the west actually came from Peru) in the Treaty of Petropolis. the straight border in the state of Amazonas is the Apapóris-Tabatinga line and Brazil forced it, individually on the three countries that claim the region, Peru, Ecuador and Colombia (which disputed the region under these terms "if the dispute is favorable to (country x) as Brazil expects, (country x) will agree to the Apaporis-Tabatinga line". Roraima has already said so. Finally, the Amapá border was an old Portuguese claim, which France, even after having signed it, still refused to comply with, only doing so after arbitration. There are many details that complicated the text, so I skipped it.
I refer here to the souther end of the frontier, today in the territory of Rio Grande do Sul.

The treaties worked with the river and watersheds, so as a base I took this map from the Compania de Pesquisa de Recursos Minerais dated of 2005. I then separated the basis I consider important. Ibicui, Jacuí, Negro, Camaquã, Piratini and Jaguarão rivers.

Base.png

The situation. Watersheds in black, today Piratini and Ibicuí rivers in orange. Ibicuí-mirim and the Santa Maria rivers in pink.

1) Let's start with the treaty of Madrid. It follows the watershed up to the Ibicuí source. The watershed in question is Black and Ibicuí river to the west and Jaguarão, Camaquã and Jacuí rivers to the east of the line. The problem: today the Ibicui is consider the junction of the Ibicuí-mirim and the Santa Maria rivers (point A) and it does not have a proper source. There are many possible sources to follows.

If we follow the Ibicuí-mirim or one of it's tributaries, the source is northeast of point A. Point B is the source of the Ibicuí-mirim, for exemple. This is actually somewhat similar to the drawing of the Mapa Das Cortes that was the official map of the treatyof Madrid(red line in the map). I must mention that this map is awful in this region, so although official, it's not a good geographical source.

If we follow the Santa Maria river, or it's main tributary, the Ibicuí da Armada river, we end up with the river source way to the south. The Santa Maria river source is point C. Ibicuí da Armada river has many tributaries and it's sources are to the west of point C. This is more similar with the map present in the Wikipedia page.

The difference is rather big, so which one to consider? My initial guess was using the Santa Maria river source (C).

2) Now, the San Ildefonso treaty, which was even more confusingly written, but is in accordance to the interpretation of Braziler it is easier to draw. It follows the Mirin lake, then the São Gonzalo channel and up the Piratini river to it's source. Question: which source? It has numerous tributaries. Point D is in the source in the map I took as a base. Other possible sources, arroio basílio and it's tributaries, are a little to the west of point D.

3) Also in the San Ildefonso treaty, after the source of the Piratini river, it follows the watershed between the Jacuí and Uruguay basins up to the source of Garita river. However, the Piratini basin does not touch neither the Jacuí or Uruguay basins, as it is comprised between the Camaquã and Jaguarão(Camaquã goes to the Patos lagoon and Jaguarão to the Mirim lake). To solve this, I just followed the watershed of this basis up until I reached the Uruguay basin.

proposed.png

Proposed lines. Madrid in yellow, San Ildefonso in green.

So, does it seems ok to represent the treaties? Any feedback or ideas?