- Android botany climate change Data handling Data sources decision support tool forest GIS GIS software GRASS GIS history LibreOffice / OpenOffice Mobile tools Modelling online mapping Open access Operating system QGIS R computing environment research tools Software release Spatialite SQLite statistics tools Ubuntu Uncategorized vegetation
May 2013 M T W T F S S « Apr 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Tag Archives: QGIS
Articles about field studies sometimes (but not always unfortunately) contain coordinates delimiting the boundaries of the field study. What if you want to view those boundaries in e.g., Google Earth? In other words, how to create a polygon layer based … Continue reading
How to sum up values of neighbouring polygons in QGIS? This question was asked on gis.stackexchange, with two interesting answers. One answer explains how to use Spatialite and SQL to achieve this. The other answer, explained in more detail here, presents … Continue reading
Check out this post by Underdark about two sets of new QGIS symbol packages with series of simple fill symbols based on ColorBrewer. Create work!
In my previous post I described how you can create a random stratified sampling using GRASS GIS. Unlike in GRASS GIS however, QGIS has a dedicated tool to do this. You can find it under ‘research tools’ in ‘Vector’ menu.
NASA offers a very convenient web-based tool to select and download the tiles you need; Reverb / ECHO. The tiles are in HDF format and use the Sinusoidal grid tiling system (proj4 definition: +proj=sinu +lon_0=0 +x_0=0 +y_0=0 +a=6371007.181 +b=6371007.181 +units=m … Continue reading
The list of plugins for QGIS is becoming rather long, which is a testimony to how active the QGIS community is. It does make it more difficult to find and select the plug-ins for your work. And if you find … Continue reading
Check out this post on Nathans QGIS and GIS blog: Five new awesomely awesome QGIS features. See also this blog post by Anita Graser, who describes improvements to the Symbol manager in more detail.
To create a Google earth map, I would normally export my raster layers as a geo-referenced png file and subsequently use maptiler (or gdal2tiles.py) to create the Google earth map (see here for more details). Because I want to create … Continue reading