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Adding maps

From qlandkartegt

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(Iceland: New section)
(Iceland: LMI & viewfinderpanoramas.org)
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=== Iceland ===
=== Iceland ===
* [http://www.ourfootprints.de/gps/mapsource-island.html Mapsource map] (see download links at the bottom).
* [http://www.ourfootprints.de/gps/mapsource-island.html Mapsource map] (see download links at the bottom).
* [http://lmi.is/english/ National Land Survey of Iceland] (various free raster maps).
* [http://www.viewfinderpanoramas.org/dem3.html#nat Iceland] Digital Elevation Data.
=== Italy ===
=== Italy ===

Revision as of 14:56, 3 December 2011

Maps fall into three main categories in terms of how they are used in QLandkarte GT: raster, vector and WMS maps. These may be maps that you have purchased, downloaded off the Web or scanned in yourself. The following sections describe how to add a map of each category and link to pages that describe further manipulation. Below these you will then find sources for free maps which you can use with QLandkarte GT.

Raster maps

These are your basic raster images (i.e. non-vector like PNGs and JPEGs) of maps. In some cases these have been georeferenced so that they contain information about their location on the globe. In the case of GeoTIFFs all you have to do is load them with FileLoadMap. The Canadian GeoBase, for example, provides its data (maps and aerial photographs) on the GeoTIFF format. Other formats may need converting.

For raster maps without any location data, QLandkarte GT has tools to georeference a map yourself. The National Land Survey of Iceland, for example, provides free to download scans from its archives. This way you can also scan your own maps and use them with QLandkarte GT.

Vector maps

Vector maps are particularly useful to overlay maps with other maps. These can for example be contour maps or maps of points of interest which can be overlaid on top of a background raster or vector map.

Vector maps are loaded with FileLoadMap like raster maps.

WMS maps

The Web Map Service (WMS) is a protocol that allows georeferenced maps to be served over the internet. If you compiled GDAL with WMS map support you can connect to a WMS server by loading an special XML description file. Some servers provide these XML files, but others can be constructed with a bit of work. For available XML files, see thecollection of WMS maps.

To use a WMS map, load the XML file with FileLoadMap. Note that WMS maps are online-maps and it is possible that the map-server is very slow, Sometimes it gets better if you try later.

To permanently add WMS maps to the left hand toolview you have to embed the XML file into a QMAP definition. To do so, select Maps(F1) → Edit/Create Map(F6) and select "Create map collection from existing geo-referenced files." from the combo-box.

Freely available maps

Ignoring for a moment that there is no such thing as a free map, there are a number of ways to access maps on line free of charge. The bulk of these have been created by government agencies (and thus paid for by taxpayers) who have made them freely available to the general public.

TODO: The maps of each country/region should be put up in a table with columns to identify whether they are vector, raster or WMS and possibly the copyright status.



  • Topo Belgium 1:10000, 1:50000, 1:100000 WMS-Map Date 15.11.2011
















  • Topo USA 1:50.000 WMS-Map Date 25.07.2011
  • Ortho USA 1:50.000 WMS-Map Date 25.07.2011
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