Monthly Archives: July 2012

Exporting vector layer as kml in QGIS

In my previous post I described how to export a vector layer from GRASS GIS as kml file. The key was to use the dsco parameter to define the columns that should be used for the Name and Description fields … Continue reading

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Exporting point file as kml in GRASS GIS

The v.out.ogr function in GRASS GIS let you export your vector layer to any format supported by OGR (it is basically an interface to the GDAL/OGR function ogr2ogr). This includes kml files. E.g., v.out.ogr input=labels layer=1 dsn=/home/paulo/test.kml format=KML will export … Continue reading

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From xy table to spatial table in spatialite

A short note on how to create a spatial table from a table with latitude and longitude coordinates in your SQLite / Spatialite database. In the example below, the table I am working with is ‘labels’.

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Creating alternative emails from your gmail

In Gmail there is no easy way to sort. The good folks at Google seem to have this idea that everything should be done by searching. Sure, I use the search function all the time. But really… No option to … Continue reading

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A great way to try out open source GIS software

I just came across an email thread on the QGIS email list that mentioned OSGeo-Live. This is a “self-contained bootable DVD, USB thumb drive or Virtual Machine based on Xubuntu, that allows you to try a wide variety of open … Continue reading

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From multiple rasters to one Google earth layer

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

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Reprojecting your layer in Spatialite

I have a vector layer ‘nursery data’ in a Spatialite database. The coordinate reference system of the layer is WGS84 geodetic (EPSG 4326). What if I need to reproject the layer in WGS84/UTM37N (EPSG 32637)?

Posted in GIS, QGIS, Spatialite, SQLite | Tagged , , , , , , | 1 Comment

JournalTOCs – a convenient way to follow your favorite journals

I just came across JournalTOCs. It is a website for, and I am quoting, “anyone who’s looking for the latest or most current papers published in the scholarly literature with international coverage”. It is a free service with a very … Continue reading

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From attribute table to QGIS style file – step 2

This post is a follow up on an earlier post where I described how to use a column with RGB values in an (attribute) table to create mapping symbols for QGIS. The next step is to create the qml legend … Continue reading

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