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Results tagged with georeferencing
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user 5666
Aligning geographic data to a known coordinate system so it can be viewed, queried, and analyzed with other geographic data.
7
votes
Accepted
Which CRS would you use to georeference historical world maps?
The example map have some kind of Mercator projection (I believe that it is Miller cylindrical projection) with a Greenwich as a central meridian. most Other maps have the same projection or some kind …
- 5,621
10
votes
Accepted
What is some theory on the number of GCP when georeferencing?
The number of points depends on type of the transformation (and georeferencing is always a transformation) that you need to apply to the image. … Also you may check out my notes on the georeferencing for some extreme scenarios. …
- 5,621
6
votes
Merge images first, or georeference first?
Well, QGIS is not that good in creating of continuous rasters if that's what you want. Nevertheless it all depends on precision you wish to have in the end. If you wish to trade precision for swiftnes …
- 5,621
1
vote
How to match air photo to existing vector layers on Mac OS?
Georeferencer is available by default. In QGIS 1.8 go Raster-> Georeferencer -> Georeferencer.
- 5,621