Performance comparison GRASS vs. ArcGIS

Longest flow path

The r.accumulate module implements a fast longest flow path algorithm for hydrologic modeling. (Quote: Twitter, Test: Paper)

Vector buffer (special case)

Task: Create buffer around vector polygon with negative distance

Input data: Vector layer 'StatPolygon' from ArcCR500 dataset

Comparison: Windows Server Enterprise • Intel Xeon CPU E5520 2.27GHz 2.26GHz (2 processors) • 8GB • 64bit OS

• GRASS 7: v.buffer input=StatPolygon output=Stat_5000 distance=-5000 → 12sec
• ArcGIS 10.2.0: Buffer StatPolygon Stat_5000 "-5000 Meters" FULL ROUND NONE → 6min 50sec

Vector buffer with negative distance (GRASS)

Vector buffer with negative distance (ArcGIS)

Clipping Contest Benchmark

ContourClipTest with ArcGIS, QGIS, GlobalMapper, Manifold, JGRASS ... (tests done in 2011):

https://courses.neteler.org/arcgis-vs-qgis-etc-clipping-contest-rematch-revisited/

See also

• GRASS GIS Performance