Geography Reference
In-Depth Information
GRASS 6.2.2 (alaska_albers):~ > v.out.ogr input=quad_boundary type=area dsn=. \
olayer=quad_boundary.shp format=ESRI_Shapefile
Exporting 3011 areas (may take some time) ...
100%
3011 features written
GRASS 6.2.2 (alaska_albers):~ >
You'll find that GRASS supports a lot of input and output conversions
for both getting new data into GRASS and exporting it out for use with
other applications or to share with others.
Another great way to convert both vector and raster formats is using the
GDAL/OGR suite of tools. Since there are so many possibilities, we'll
8.4
Using GPS Data with QGIS
GPS units are everywhere these days. Between the practical use for
the professional and the recreational user, as well as the popularity of
geocaching,
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it seems like everybody is using them. I'm sure you would
like to display your GPS adventures on a topographic (read DRG) map,
especially after we work through how to create seamless rasters using
is there are lots of open source tools available for working with your
GPS. You'll need a GPS with an interface cable so you can move data
to and from your computer. In this section, we'll show you how to put
your data on the map using the GPS plugin that comes with QGIS.
Getting Set Up
Obviously you need QGIS installed and working on your platform. The
only other requirement (apart from a GPS unit) is
gpsbabel
.
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QGIS uses
gpsbabel
to import other formats and for GPS downloading and upload-
ing operations. Fortunately,
gpsbabel
runs on all the same platforms
as QGIS, so if you can run QGIS, you can use it with your GPS. Actu-
ally,
gpsbabel
is a remarkable little program. It runs on almost every-
thing and supports 100+ formats and a bunch of GPS hardware. For
upload/download, if you have a Garmin or Magellan unit, you should
be good to go. For others, see the format list on the web page to see
whether yours is listed there.
6.
7.
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