Yue Hong Chou is assistant professor of geography in the department of earth sciences, University of California, Riverside.
Map Resolution and Spatial Autocorrelation
Article first published online: 3 SEP 2010
1991 The Ohio State University
Volume 23, Issue 3, pages 228–246, July 1991
How to Cite
Chou, Y. H. (1991), Map Resolution and Spatial Autocorrelation. Geographical Analysis, 23: 228–246. doi: 10.1111/j.1538-4632.1991.tb00236.x
- Issue published online: 3 SEP 2010
- Article first published online: 3 SEP 2010
- Revised version accepted 12/6/90
Moran's I, a measure of spatial autocorrelation, is affected by map resolution and map scale. This study uses a geographic information system (GIS) to examine the resolution effects. Empirical distribution of wildland fires in Idyllwild, California, and hypothetical distributions of ordered patterns are analyzed. The results indicate that Moran's I increases systematically with the resolution level. The resolution effects can be summarized by a log-linear function relating the I coefficients to resolution levels. Empirical tests that compare the distribution of fire activity in a vegetation map and in a topographic map confirm the resolution effects observed.