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Monthly Archives: February 2012
Extract X and Y coordinates from a spatial table in Spatialite
A quick note on adding two columns with X and Y values in a vector layer in spatialite. Spatialite stores the information about the geometry in binary format in the ‘Geometry’ field. You can use the Spatialite function AsText() to … Continue reading
Posted in Data handling, Spatialite, SQLite
Tagged coordinates, geometry, Spatialite, sql statement, vector layer, wkt
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NASA publishes new global map of the height of Earth’s forests
Interesting new map of the height of Earth’s forests. See this article for more information or go the NASA lab propulsion laboratory website to download the map (kmz file to see the map in Google earth layer or a geotiff). … Continue reading
CheckInstall
Just a quick note on a handy tool for when you are compiling from source. The last step you would normally do when compiling from source is the sudo make install. To uninstall the software later you would use sudo … Continue reading
Quick multi attribute edit in QGIS
There seem to be a lot of momentum in the development of QGIS and QGIS plug-ins. Existing plug-ins are regularly updated while new plug-ins are released frequently. One recently released plugin is the quick multi attribute edit plugin. It offers … Continue reading
Split strings in SQLite
I am just back from vegetation survey in Kenya and Uganda. Before starting with the analysis, I will have to go through the more boring data entry and organization. I will use a Spatialite database to store all the data … Continue reading
Posted in Data handling, QGIS, Spatialite, SQLite
Tagged language sql, open source, QGIS, Spatialite, split string, SQLite, Substr, trim, waypoint data
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Nederlandse (Dutch) QGIS community
I just came across the Dutch QGIS site: http://www.qgis.nl. The objective of the website is “to create a platform for native speakers AND to discuss / explore typical dutch ideas or problems”. But the tutorials on this site will not … Continue reading
New “Control Rendering Order” Option in QGIS
I just installed the latest QGIS development version (build 1.9.90-Alpha), and one of the changes I noticed was the option “Control rendering order” in the layers pane. I had to Google to check out what this new option was about. … Continue reading
Posted in GIS, GIS software, QGIS
Tagged GIS, map legend, maps, open source, QGIS, QGIS 1.9
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Interesting list of mobile apps used in field work
A list of smartphone applications used in field work by ecology-l members: http://www.wec.ufl.edu/faculty/brunae/AppList.php
Posted in Mobile tools, research tools
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