Raster Data Explained - Open Source Geospatial Tools: Applications in Earth Observation - page 53

Fig. 3.2 Schematic overview of raster image using map projection coordinates in European pro-
jection system EPSG:3035

Unlike image coordinates, the projected coordinates in a SRS are expressed in
distance (e.g. meters). The origin (0,0) is no longer the upper left pixel of the
image, but the origin of the projection system (see Fig. 3.2 ). As an example, the
pixel in Fig. 3.2 with image coordinates (6,5) corresponds to ( x = 3522650 m ,

in projected coordinates (European projection ETRS89/LAEA),
corresponding to Lon

y = 2913075 m )

48.797638N.
Depending on the image processing software, the origin of the raster space can
differ. The origin can be at the upper left corner, but also at the center of the upper left
pixel. The default behavior of GDAL is to choose the upper left corner for GeoTIFF

= 0.908834W, Lat =