Monthly Archives: December 2014
Maps have long been used by people to help navigate and understand our world. Early maps guided early humans to basic necessities such as food and water.
Today, the world is changing rapidly, and it’s difficult for traditional maps to keep up with the pace of that change. To help us keep pace with our evolving planet, we need something better. We need new, more comprehensive maps.
Esri has developed two new maps—the most detailed population map in the world and the most detailed ecological land unit map in the world—to help address the challenges we face and make our world a better place.
A New Map of World Population
Esri has compiled a human geography database of demographics and statistics about all countries in the world and has mapped this data using a new, innovative methodology.
Advances in technology are changing the type, quantity, quality, and timeliness of information…
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ESRI just released ArcGIS 10.3. The newly added Space Time Patter Mining toolbox seems very interesting.
The Space Time Pattern Mining toolbox has two tools: Create Space Time Cube and Emerging Hot Spot Analysis. Create Space Time Cube takes potentially very large point datasets and builds a multidimensional data structure for analysis.Emerging Hot Spot Analysis takes the space time cube data structure as input and identifies hot and cold spot trends. You might use Emerging Hot Spot Analysis to analyze crime data, for example, in order to locate new, intensifying, persistent, or sporadic hot spot patterns.
My co-authored article on wetland classification just got published online: http://www.mdpi.com/2072-4292/6/12/12187
Improved Wetland Classification Using Eight-Band High Resolution Satellite Imagery and a Hybrid Approach
Very detailed instruction for dealing with STRM data. Good stuff!
As a prelude to a post on topographic correction of Landsat images, we here review the basic steps to get elevation data and preparing them for using as a base for topographic correction.
The Shuttle Radar Topography Mission (SRTM) is a tremendous resource because of its high accuracy and its consistency as a “snapshot” of Earth’s surface, acquired over just 10 days during February 2000. It is also freely available for anyone! SRTM was a specially designed mission of the Endeavour space shuttle, with a specially built sensor antenna, and aimed to map the Earth’s land topography using radar interferometry. As a result, during the 10 days of the mission, the land surface topography between latitudes 60°N and 56°S, or about 80% of Earth’s surface, was mapped with a final cell size of 1 arc-second (about 30 m) and absolute elevation errors under 10 m. More details about the mission…
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