Monthly Archives: March 2011

New spatialite plugin for QGIS

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

R/GRASS connection: more than the sum of its parts

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

Visualizing confidence in data on map: example of SoilWeb Mobile

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

R plot in ZIM desktop wiki

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