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Showing posts from January, 2011

Free Geodata

Whenever you have a spatial project it usually begins with some data.  Now what if you don't have any data?  Well here come some sources to your rescue. EDEN Data Archive   has a huge list of free data sources OpenStreetMap GeoFabrik Cloudmade International ADDS - Africa Data Dissemination Service Natural Earth Data Depot's Country List GeoBase: Canadian site for sources of free GIS data GeoGratis: Canada's National Digital Atlas Geoscience Australia Gridded Population of the World GoGeo GIS Database (UK) Russian Federation Digital Data Southern Africa Regional Science Initiative (SAFARI)   Imagery Arizona Regional Image Archive (AVHRR, AVIRIS, MSS, TM, SPOT for six southwestern states including California) Canadian Geospatial Data Infrastructure Earth Explorer (Landsat, AVHRR and aerial photos) Earth Observing System Data Gateway (Atmosphere, land, ocean, solar and cryosphere imagery) Geoscience Australia (Free Landsat 7, MODIS & AVHRR

Python and related spatial resources

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To start the first post of the new year here are some thoughts and resources to anyone just starting out in GIS who has NO computer science training at all and wants quick access to great python spatial resources in print and on the web. James Fee over at his blog post has also some thoughts on python for 2011. Why Python ? well ESRI the "world number one" in GIS uses it as its scripting language of choice and VBA will eventually die. Plus the open source GIS scene is also in love with python and of course I just like it. Python books I invested some money into when I started out.  The rest of the python resources are of course all coming from web sources, blog posts and from reading a TON of documentation. First off here are two good free books to get you started: Byte of Python How to think like a computer scientist These ones cost some money if you still read hard copies ( I do )   Second on the list are bloggers who use Python : Sean Gillies   New Yor