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Is there an application / service where I can put my floorplan of a building en 'position' it on the right place on the earth? (The buildings location).

I found TileMill an application where I can import an raster image in. Howerver the image covers the entire world.

When importing I supplied an 900913 'string' with some information about the location and size I presume.

+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over

With the above string the building 'covers' the entire earth. Is there a way to get the 'correct' string so I can place it over the correct building?

Kind regards

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Can you tell us a bit more about your data. Is it originally CAD and what is the origin(is it a nominal 0,0 location as opposed to a real-world georeferenced location? – MappaGnosis Apr 25 '13 at 14:54

I'm not sure about Tile Mill, but if you have ArcMap you can do this fairly easily by importing the image and Geo-referencing it, the advantage of this is if you're using version 10 or later you can use ArcMap's base data feature to use satellite imagery as a background, and then just align your floor plan based on that.

Here's a guide on how to georeference in ArcMap...

If you don't have ArcMap, the same thing can also be done in QGIS (which is free) however it may be more difficult to find a satellite image to align your floor plan to. Here is a guide in QGIS...

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+1, also just FYI, but QGIS has an "OpenLayers" Plugin that includes base imagery from Google, OpenStreetMap, Yahoo, and Bing. It's easy to install through the built-in Plugin fetch/management interfaces. – elrobis Apr 25 '13 at 18:29

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