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Free population distribution data for Asia and Africa
Due to a lack of mapping resources and difficulties in obtaining census statistics for many Asian countries, the AsiaPop project was set up in July 2011 to produce detailed and freely available...
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10 Geospatial Predictions for 2013
In our book The GIS Guide to Public Domain Data, we included several items from our colleague Matt Ball, who has been writing about spatial data for many years. His recent 10 geospatial predictions...
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New Digital Globe Imagery in ArcGIS Online
In chapter 3 of our book The GIS Guide to Public Domain Data, we discuss the increasing resolution, types, and ways to access sources of imagery and the implications of these changes for data users....
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GIS Data on Urban Expansion for World Cities from Lincoln Institute of Land...
The Lincoln Institute of Land Policy contains an extensive section of GIS resources for 120 cities around the world as part of their Atlas of Urban Expansion:...
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Historical and seasonal Landsat data: WELD Resource
The Web-enabled Landsat Data (WELD) project generates 30-meter composites of Landsat 7 Enhanced Thematic Mapper Plus (ETM+) terrain corrected (Level 1T) mosaics at weekly, monthly, seasonal and annual...
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Inexpensive and crowdsourced remote sensing
In an article entitled “The Watchers”, David Samuels discusses a company seeking to deploy small satellites into orbit 500 miles (805 km) above the Earth. This company, Skybox, founded by ex-Stanford...
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Considering the Vintage of Imagery in Analyzing the Earth
Considering the vintage, or date, when satellite or aerial imagery was acquired is essential information in investigating land use, vegetation health, or any other variable using GIS and Remote Sensing...
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Global Forest Watch initiative
The World Resources Institute (WRI) has recently announced the launch of Global Forest Watch (GFW), a dynamic forest monitoring system that provides aims to provide ‘timely and reliable’ information...
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UAVs Prohibited in National Parks in the USA
As we state in our book, The GIS Guide to Public Domain Data, oftentimes, technological advancement and adoption proceeds at a faster pace than regulations accompanying it. A perfect example is what...
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Track on Track: Reflections on GPS Accuracy on a Running Track
Recently, while at the Applied Geography Conference in Atlanta, I decided to test the spatial accuracy of my smartphone’s GPS in a challenging environment–a rooftop running track. Although located on...
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Daily Satellite Imagery for Planet Earth
In this blog, we have written about the revolution occurring in the remote sensing world, centered on inexpensive and crowdsourced remote sensing. As described in this TED talk from Planet Labs’ Will...
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Imagery: It is what it is: Well, not always.
Being critical of all data, including geospatial data, is a chief theme of this blog and our book: Use it wisely. Know where it came from. Know what has been done to it. Imagery has always been an...
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The Top 12 Most Useful Landsat Image Sites
Recently, I wrote an essay about the sites that are, in my judgment, the top 10 in terms of containing useful geospatial data. Now, I would like to describe what I consider to be the top sites for...
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Top 7 Satellite Imagery Sources
My colleagues at EOS.com recently wrote a summary of what they consider to be the top 7 satellite imagery sources: https://eos.com/blog/7-top-free-satellite-imagery-sources-in-2019/. These include...
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