Importing WorldClim climate .bil datalayers in GRASS GIS II

I uploaded an update to the R script I posted earlier to import data downloaded from WorldClim into GRASS. The main change is that it unzips and imports one grid at a time into GRASS, thus requiring much less free space on your hard-disk.

It moreover has the option to import and convert the layer to the region settings of the mapset you are working in. Alternatively, you can import rasters in their original extend and resolution. Continue reading “Importing WorldClim climate .bil datalayers in GRASS GIS II”

A vegetation map in OpenLayers

For a project a few years ago we created a vegetation map for central and southwest Kenya (see here for more information). The map together with documentation was made available on CD-ROM. However, we wanted to publish the map online too. The original maps were in svg format, and turned out to be too slow for online publishing. Moreover, they could not be combined easily with other maps.

A widely used and open source option for online publishing of maps is OpenLayers. This is a JavaScript library for displaying and building rich web-based geographic applications, similar to what is offered by e.g., Google Maps and MSN Virtual Earth. An important difference though is that OpenLayers is open source software. It furthermore is easy to create dynamic maps on your website with your own data and with direct access to many different maps, including Google, Yahoo, Bing, OpenStreetMap and other datalayers.

As a pilot I have created an OpenLayer map with the vegetation map. Continue reading “A vegetation map in OpenLayers”