Comparative Analysis of Cost Path Analysis In Grass GIS and ArcMap

ArcMap

Process

Open ArcMap and create a new map layout.

The following data files used are:

• 1. littlered.shp - The start location of little red.
• 2. gramma.shp - End location Gramma's cottage.
• 3. landcover.shp - The land cover types present.
• 4. elevation.shp - Elevation points for the area.
• 5. AOI.shp - Area of interest polygon that defines study area.

Add all of the above layers to the data frame.

Interpolation In order to obtain the slope factor we first need to create a Digital Elevation Model (DEM) from our elevation points.

The DEM will be interpolated using the Inverse Distance Weighting (IDW)method and will be created with 500 m resolution. This is obtained with ArcMap's IDW tool.

ArcToolBox/SpatialAnaylstTools/interpolation/IDW

GRASS GIS

About GRASS

Geographic Resources Analysis Support System