Combined scale factor (CSF) is introduced in this post as well as the difference between ground coordinates (surface coordinates) and grid coordinates. As explained in the post, in a GIS…
Combined scale factor (CSF) is introduced in this post as well as the difference between ground coordinates (surface coordinates) and grid coordinates. As explained in the post, in a GIS…
XPSWMM can load an image raster file as background to facilitate the drainage network creation. The image file needs to have a world file associated with so that XPSWMM is…
A big size raster file usually can be compressed to reduce its size. A lot of QGIS raster tools/commands have a built-in option to select a method to compress a…
A raster file is a matrix of predefined cells (pixels) with certain number of rows and columns. The level of detail represented by a raster depends on the cell (pixel)…
The SCS (NRCS) Curve Number is used to quantify infiltration loss during runoff calculation. As illustrated in Figure 1, the CN is determined by both soil types (Hydrologic Soil Groups,…