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seen Oct 22 at 16:09

Sep
8
comment Preserve polygon boundaries when vectorizing a raster according to a polygon vector
this is more or less what I actually was looking for, but still, it turns out a clip does not separate polygons which are adjacent, letting to polygons that are merged when in the clipper are separated by a line (that is adjacent polygons)
Sep
3
comment Preserve polygon boundaries when vectorizing a raster according to a polygon vector
Some areas still are not correctly cropped, I will try something different (maybe an intersection?)
Sep
2
comment Preserve polygon boundaries when vectorizing a raster according to a polygon vector
Thank you, but that's what I am looking for, an automatic method. Anyway, your help is appreciated!
Sep
2
asked Preserve polygon boundaries when vectorizing a raster according to a polygon vector
Sep
2
awarded  Notable Question
Aug
14
comment Remove Holes Existing Within a Single Polygon for a specific area in Qgis
I should mention that I use qgis 2.4 and it does not work here since it has been written for another version (not soecified in the page).
Aug
14
answered Remove Holes Existing Within a Single Polygon for a specific area in Qgis
Aug
13
awarded  Yearling
Aug
12
awarded  Caucus
Jul
2
awarded  Curious
Jun
11
comment How to calculate orientation of line segments using open source GIS?
Thank You, I translated it into MATLAB.
Jun
2
accepted Calculate actual Landsat image corner coordinates to derive azimuth (heading)
May
30
comment Estimating Landsat 7 azimuth (heading)
I finally find a solution, please see my answer at gis.stackexchange.com/questions/98425/….
May
30
answered Calculate actual Landsat image corner coordinates to derive azimuth (heading)
May
30
comment Calculate actual Landsat image corner coordinates to derive azimuth (heading)
I can derive the center of my image between its corners, but then how would I draw a line in it (in which direction?). I think using one of the side could anyway be a good proxy, but the best would be doing what you said, but it's tricky I suppose.
May
30
revised Calculate actual Landsat image corner coordinates to derive azimuth (heading)
added 371 characters in body
May
30
revised Calculate actual Landsat image corner coordinates to derive azimuth (heading)
added 414 characters in body
May
30
comment Calculate actual Landsat image corner coordinates to derive azimuth (heading)
According to the first link you posted, I got that the satellite passes above a specific location, always at the same hour ("same local mean solar time"), but the inclination of the satellite with respect to the polar orbit (saying, with respect a meridian), should be different as the satellite follows a "near-polar orbit". I am dealing with shadow casting on Earth, thus the satellite azimuth is very important to me. Finally, the S-shape is preserved, but should be slightly different than that of an exact polar orbit.
May
30
revised Calculate actual Landsat image corner coordinates to derive azimuth (heading)
added 256 characters in body
May
30
asked Calculate actual Landsat image corner coordinates to derive azimuth (heading)