9 replies to this topic

[François Goulet]

Hi!

I have two maps of south Chile to do (near the Argentinian border) and I'm looking for data in the 1:250,000-1:500,000 range...

I use VMAP0 for now, but it's horribly bad in that area. My GPS points are sometimes almost 2 km off! (but they fit with Landsat orthorectified imagery so I know they're good)

Any idea? I've search for over 3 hours this morning and so far, no luck!

Thanks!!

[Nick H]

It might just be worth looking at OSM data .

http://downloads.clo...ads_breadcrumbs

Regards, N.

[François Goulet]

It might just be worth looking at OSM data .

http://downloads.clo...ads_breadcrumbs

Regards, N.

Though too... but nope!

Thanks!!

[trangy]

did you try natural earth?

http://www.naturalearthdata.com/

[François Goulet]

Yes... but it's 1:10 mil

Greatest dataset, but the scale's too small...

Thx!!

[Nick H]

I think you'll struggle. It's a long shot but there is always:

http://www.gadm.org/country

Admin areas only, probably not much use for what you want.

Regards, N.

[sitesatlas]

For coastlines and lakes -- which is half the battle in southern Chile -- you'd definitely want to look at the SRTM Water Body Data Files, the oceans and lakes derived from the high resolution (90 m?) SRTM dataset. They're divided into 1 x 1° tiles and available as zipped shapefiles here.

The attachment is a screenshot of the data from the Reina Adelaida Archipelago area.

Attached Files

•  Reina_Adelaida.gif   53.18K   21 downloads

[François Goulet]

For coastlines and lakes -- which is half the battle in southern Chile -- you'd definitely want to look at the SRTM Water Body Data Files, the oceans and lakes derived from the high resolution (90 m?) SRTM dataset. They're divided into 1 x 1° tiles and available as zipped shapefiles here.

The attachment is a screenshot of the data from the Reina Adelaida Archipelago area.

That's great!

Thanks! (they don't have linear hydrography, don't they? )

[sitesatlas]

That's great!

Thanks! (they don't have linear hydrography, don't they? )

No, they don't, I'm afraid. On the other hand, the files are derived from SRTM elevation data, which you might be able to use to generate a matching stream network...

[François Goulet]

The Military Geographic Institute of Chile is selling each 1:250,000 and 1:50,000 sheets for less that 200$.

We had a submission to do, but if we have the contract, maybe we'll go in the commercial way...

Thanks guys, that helps a lot!!!