> i am a very beginner in GeoTiff and Georeferencing.
> _ i have an image in .emf file format.
> _ i also have these UTM informations:
> Exemple: 400000,4379520,24,N
> How can i use GDAL to create a geotiff from these informations ?
> (My GeoTiff need to be in wgs84, epsg:4326)
> (i need to use command line tools, no GUI)
> i think i need to convert .emf to a file format which can be supported
> by GDAL such as .bmp ou "standard" .tif. But After ?
> Maybe with gdal_translate and/or gdalwarp, but how ?
> Note: i am a very beginner.
Re: How to create GeoTiff from image and UTM Coordinates
On Sat, 26 Jan 2019 at 05:50, Adrien André <[hidden email]> wrote:
> If GDAL cannot read the .emf file, try using ImageMagick:
> convert image.emf my_raster.png
This is a good approach, however you will also need to pay attention
to convert's -density and -units options  to maintain some sort of
meaningful scale between projected meters and whatever resolution is
used with the original vector image. Also, you can directly write a
.tif file instead of .png to start making a GeoTIFF.
> Then, you might try to create a worldfile my_raster.wld (See ).
> The attached example is for a resolution of 10x10m and if
> (Easting,Northing) is for your image upper-left corner.
Be aware that a wordfile references the center of the upper-left cell,
not the corner. An alternative tool that can directly modify a raster
is gdal_edit.py , e.g. spatial extent, resolution and CRS. This
tool (as well as GDAL) references the corners of cells, as expected.
After making a georeferenced raster in a projected CRS (e.g. UTM),
then you can create a second raster reprojected in WGS84 using
gdalwarp , or just allow GIS software to reproject on-the-fly (e.g.
QGIS does this nicely).