[Qgis-user] Raster image is georeferenced to UTM projection. Doubt about CRS.

[MARIO ROBERTO PADILLA RAUDALES]

WSG 84

2013/3/10 Gregorio Inda <gregorio_inda at yahoo.com.mx>

> Hi,
>
> I am new user of Qgis, and new on GIS too. I have tried to figure out what
> is the explanation for what I supposed is something that I am
> misunderstanding.
>
> Using Google Earth I zoomed into a small region and captured the image
> using print screen. I supposed that Google Earth CRS was WGS 84 (EPSG:4326)
> for that small area (a city). Now, using Google Maps I selected four
> specific well and easy referenced points into the image to get geographics
> coordinates (longitude and latitude). In Qgis
> Raster/Georeferencer/Georeferencer I added those points once I first added
> the PNG raster file in this plugin considering that CRS was WGS 84
> (EPSG:4326). I saved the points in file.png.points file. In Transformation
> Setting of this plugin I left the default values, but I selected Create
> world file and changed the Target SRS to WGS 84 / UTM zone 14N
> (EPSG:32614). Start georeferencing button produced a world file for PNG
> image.
>
> In a new Qgis session I opened PNG file (with world file present) and Qgis
> asked me what CRS I wanted to define. If I select WGS 84 / UTM zone 14N I
> can see how coordinates are changing when I move the mouse over the image,
> but that coordinates are geographics (longitude and latitude). If I select
> just WGS 84 (EPSG:4326) then I can see UTM coordinates changes when I move
> the mouse over the image. But ¡I expected the opposite!
>
> Could someone help me to understand this?
>
> Regards
> Gregorio
>
> P.S. The CRS of the project is set to WGS 84 / UTM zone 14N (EPSG:32614)
> Ubuntu 12.04 64bits
>  QGIS version
>  1.8.0-Lisboa
>  QGIS code revision
>  exported
>  Compiled against Qt
>  4.8.1
>  Running against Qt
>  4.8.1
>  Compiled against GDAL/OGR
>  1.7.3
>  Running against GDAL/OGR
>  1.7.3
>  GEOS Version
>  3.2.2
>  PostgreSQL Client Version
>  9.1.4
>  SpatiaLite Version
>  3.0.0-beta
>  QWT Version
>  5.2.2
>
>
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>
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