Shapefile

Monday Oct 06, 2008

QGIS imports ArcInfo!

I downloaded some .e00 files from Maproom for my lovely PhD project today. The only possible way of converting these files into shapefiles seemed to be via the ArcCatalog conversion tool (which, very inconveniently, had to be set up and found first...).

First things first: I found this "handy" website which gives clever links to the ESRI website on how to do the above... They did not work, try it out!

The conversion tool worked fine for half the data, the rest just couldn't be converted, no matter how hard I tried, and when I finally managed through the AVCE00 ArcView converter ArcGIS crashed and died several times (surprised?)...

Opening QGIS was a good idea, as this reads the .e00 data without any difficulty. Simply click "Add a vector layer", selecting to show files of all types and adding the .e00 files. Slighlty unexpected, because it doesn't appear in the list of options. But that's about it, otherwise great, problem solved :-)

Wednesday Jun 25, 2008

Survey data inaccessibilities

Yesterday I got *slightly* annoyed. I went out to set out a site on Monday and due to the GPS not having great reception I unpacked our shiny (not new) Leica TCR705 Total Station. All went well, but when it came to downloading I got quite upset about the fact that this piece of equipment can by default only be downloaded using a programme called LisCad - the most user-unfriendly software in the world. I struggled for quite some time - as one does and finally managed to get my data out of the machine - thanks to my helpful colleagues who are a bit more familiar with it!

Issues are the following: The data from the machine is converted into a textfile, which is LisCad-specific and has to be exported into AutoCAD format to make it workable. Problem number two is that the points which are exported have none of the data attached to them which were previously attached to them during survey - HOW ANNOYING!

Then I downloaded the GPS (Leica 1200 system) data from the same day. All data from our Leica 1200's is downloaded using Leica GeoOffice (LGO). This software is a lot more userfriendly and convenient and actually exports points with data attached and produces data output in various working formats. It still creates the link between the instrument and the computer.

Furthermore it is complicated and inconvenient to transfer between software and instruments, e.g. the TCR705's line