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0
votes
1answer
23 views

Water Quality Data Acquisition Sources

I was wondering what sources are available, or if anyone has water quality data for the Great Lakes and specifically Lake Ontario. We are interested in mapping Phosphorus, Organic Matter, Nitrogen and ...
1
vote
2answers
202 views

Is there a consumer-level handheld GPS that can use standard GIS data as its background layer?

I'm shopping around for a handheld GPS, and from what I'm seeing, none of the big vendors (Garmin, Magellan and Delorme) make a unit that can use, for example, a simple georeferenced TIFF or a ...
9
votes
3answers
220 views

Free and global basemaps for download

I'm pretty sure that a lot of people might have faced the situation where they search the internet for geographical basemaps on a global scale but can't hardly find the needed data in a short time and ...
3
votes
1answer
54 views

Sample classification datasets?

I was looking for some publicly available ground data classification datasets, specifically, locations in e.g. latitude/longitude with a description of the land cover/land use, and a reference e.g. ...
2
votes
4answers
115 views

Is there any free resource to get international raster data (other than USGS)?

I am looking for any raster database that allows free downloads of any kind of raster data pertaining to Damascus, Syria and the surrounding Turkey area. I'm trying to avoid USGS since it requires a ...
0
votes
2answers
74 views

Watershed layers with names for each one for Europe or Sweden

I am working on freshwater species and I would like, make a list of each watersheds used for each species. So I am looking for a watershed maps which contain name of the watershed. I found some good ...
2
votes
2answers
113 views

Where can I find cellmast data in the UK?

I am looking for a shapefile containing the locations of cell masts that provide phone coverage in the UK. On sites like Orange, O2 etc they have an interactive signal checker ...
2
votes
2answers
683 views

Where to download USGS DOQQ boundaries?

I downloaded a shapefile of USGS DOQQ boundaries a few years ago and cannot seem to find one now. The attached image shows an example of the shapefile I'm looking for (green polygons showing the ...
5
votes
2answers
338 views

Is there a free source of U.S. time zone borders?

I have a mapping app in which I need to display the borders between U.S. time zones. The easiest and most accurate way would be to feed in a list of lat/long coordinates representing the vertices of ...
7
votes
4answers
475 views

What are some alternative sources for USGS data?

I've been using the USGS National Map viewer (http://viewer.nationalmap.gov/viewer/) for getting data for QGIS, but the download system is driving me insane. I enter my email address and [sometimes] ...
6
votes
3answers
476 views

Where can I find free Archeology datasets?

Are there any sites that gather together free datasets? I am especially interested in published data relating to archeology.
13
votes
8answers
773 views

List of US government free GIS data online

The US government publishes a plethora of useful, high-quality GIS data sources online. The data includes: Municipal and international boundaries Classified points of interest Geographic maps ...
3
votes
1answer
3k views

Free data with good accuracy of Europe and Mediterranean

I'm searching for free data like Europe's coastline and Mediterranean island's names etc. but with good precision. I found some shp file from this site http://www.naturalearthdata.com/downloads/ but ...
2
votes
2answers
801 views

Where can I find non-rectified stereo satellite imagery?

I'm looking for free (as in beer and as in commercial-use-friendly freedom) sources of stereo satellite imagery. I assume that such imagery should not be rectified since that would remove the benefits ...
3
votes
4answers
1k views

Where can I find free Bathymetric data for Indian Ocean?

I am looking for bathymetric data, to place in a map of India for visualization only. I don't really need very high resolution data, since the the map will be at a very small scale: Maybe 1:1Million ...
3
votes
2answers
293 views

Looking for (free) WMS of surface waters of Europe

Do you know any WMS with hydrographic map of Europe? Especially I am looking for map with surface waters of Europe
4
votes
3answers
1k views

50k Mexico Topo Maps Sources?

Anyone know of another source (preferably free) for these 50k Mexico Topo Maps other than www.omnimap and www.eastview? There is a free WMS that has them but only for UTM 15 and 16 here: ...
1
vote
1answer
87 views

Online resources for creating shp files performing basic GI functionality

I am looking to build polygons, based on files containing a grid of points. The representation of the polygon would be an aggregation of the points. As the end wares are ESRI, I was wondering if ...
4
votes
2answers
3k views

usa electric transmission powerlines shape files sources

Does anyone have a good source for these? I have some old (1993) data from the US National Renewable Energy Laboratory (NREL) and Cubewerx' WMS (Cubewerx are a spatial data provider); neither of which ...
3
votes
5answers
1k views

Districts of Israel - free source

Do you know of any free GIS sources of the Israeli administrative divisions: districts (mechozot, מחוזות) and subdistricts (nafot, נפות) which rely on official government information? I heard there ...
5
votes
3answers
5k views

Free Mercator, Vector Maps

Are there any free, vector, mercator projection maps available online? I'm not wanting satellite imagery, but more a stylized map along the lines of this: However, I need it to be vector-based such ...
30
votes
7answers
4k views

List of freely available GIS books

Do you know any free available books related to GIS ?
8
votes
7answers
796 views

Are there any “highly customizable” GIS platforms?

I'm new to this site which I find useful and refreshing until now. And to my question ( WARNING: it's a bit long, so you can skip right to the question two paragraphs down). I was educated in GIS ...
9
votes
8answers
18k views

Full list of ISO ALPHA-2 and ISO ALPHA-3 country codes

I'm searching for a full list of countries with their country codes. Like on this page (need full and valid): http://www.nationsonline.org/oneworld/country_code_list.htm Thanks.