For some time now it is possible to load SpatiaLite data layers in QGIS. It is read only though, any changes will need to be saved as shapefile.
There is a Spatialite manager plugin, which offers an interface to the database, with table view, table information, preview of the map, import of dbf files and a very basic SQL editor. Unfortunately, it doesn’t offer what I would consider a key function, the option to upload layers to the Spatialite database.
This gap has now been filled by the QGIS plugin QSpatialite. Continue reading
This is an interesting data source on urban extent I hadn’t come across yet. It is based on Modis data and available at http://sage.wisc.edu/people/schneider/research/data.html and is described in more detail in an article by Scheider et al. (2009). Also check out their website here for more data sets.
GRASS GIS is a very powerfull GIS offering an extensive set of tools for geospatial data management and analysis, image processing, and spatial modeling. The possibility to directly interact with R further improves the geospatial analysis capabilities of GRASS (see R Spatial View). Continue reading
See this post for a nice example how one can display the level of confidence in the data presented for a mapping unit on a map. The SoilWeb provides the distance from the nearest map unit polygon boundary. It gives the user a little more information that can be used to judge a relative degree of confidence in the returned soils data; Continue reading
I am using Zim desktop wiki extensively as my note taking tool. To quote their website, “Zim is a graphical text editor used to maintain a collection of wiki pages. Each page can contain links to other pages, simple formatting and images. Pages are stored in a folder structure, like in an outliner, and can have attachment Continue reading
Earlier I wrote about the custom STRJOIN function in OpenOffice. A very handy function when you need to combine all values in a row or column (or combination of the two), separated by a delimiter.
In R this is (also) very easy Continue reading