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South American river systems

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#1
tmccann

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We're about to start up a GIS project covering the Paraguay and Parana rivers and tributaries. It will probably eventually extend downstream into the Plata (Plate) estuary.

Brazil has a lot of data and topo maps on their government website. However, I'm having a lot of trouble finding the equivalent for Paraguay, Uruguay, and, to a certain extent, Argentine. We're looking for fairly large-scale (1:50,000 or better) topo maps that either are or can be georeferenced, elevation models that are more accurate than SRTMs, or basically any kind of GIS data forms that would help us map and analyze these rivers.

Anyone know of any good sources? We seem to be able to find plenty of 1:500,000 maps, but we need a much larger scale.

Thanks,
Tom

#2
Hans van der Maarel

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Tom,

These links may be useful:
http://www.vterrain....ns/southam.html
Hydro1k Home Page

East View Cartographic offers digitizing services (including DEM's) off of Russian Topo maps.
Hans van der Maarel - Cartotalk Editor
Red Geographics
Email: hans@redgeographics.com / Twitter: @redgeographics

#3
tmccann

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Tom,

These links may be useful:
http://www.vterrain....ns/southam.html
Hydro1k Home Page

East View Cartographic offers digitizing services (including DEM's) off of Russian Topo maps.


Thanks Hans - The vterrain link was very useful. I'll look some more at the DEMs offered by East View.

Tom

#4
A. Fenix

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Hello tmcann,

I'm not familiar with specific hydrology data for your area of interest, but recently I have found myself in the same hydro data lurch for Alaska. I have been modeling streams (network, flow and direction) for a sub-basin using 30m ASTER DEM's (http://lpdaac.usgs.g...er/ast14dem.asp). So far the results look very good, good enough in fact to move on to the next phase of our Intrinsic Potential modeling work. There are some pretty serious setbacks to this however, the biggest one is that they cost $80/scene. Which would be very, very expensive for such a large area of interest. You could however buy scenes strictly covering the Paraguay and Parana river basins and save quite a bit. To give you a sense of cost, my study basin is approximately 7,815 sq. miles, it cost just over $1,000 to cover this area (16 scenes). The other potential issue is that that it can be a little difficult to track down just what you need (and there is no guarantee that your total study area will be covered). It took me quite some time to find scenes that were in the fall (when there was no snowfall), and that had little to no cloud cover for example. I suggest you use GLOVIS (http://glovis.usgs.gov/) to guide you through the imagery that they have available.

I hope this helps!
Analisa Fenix
GIS Manager/Chief Cartographer
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