GIS for Cave Surveyors Part 2

This second article will cover the steps I used in a recent project to produce a GIS map of the caves of the Peak District, from collecting and modifying  the location data for the caves to creating contours for the area covered. It is not intended as a tutorial for QGIS although it may be used as such. Better tutorials are available on the internet.

The initial date were derived from a GPS set on the Peak District Caving website. The data files can be downloaded as Google Earth, Garmin GPS, Memory Map or a GPX file. In this example I will use the Google Eath kmz file.

Quantum GIS can import the following vector files

You will notice that kmz files are not included in this list. That's not a problem we can use Google Earth to convert it. Double click on the file and it should open in Google Earth.

 

Right click on the layer and choose Save Place As then select file type kml. Save the file somewhere on your hard disc.

Now, back in QGIS select Layer from the main menu and, from the drop down click on Add Vector Layer

In the source type drop down select the File radio button and then click on the Browse button

Browse to the kml file you saved from Google Earth. Don't forget to change the file type in the drop down at the bottom to KMLClick on Open.

Now Open in the File Type window. A new layer will be created in QGIS with all the caves shown as  coloured dots.