agriculture analysis of variance canada cartesian coordinate system climate coal data set digital elevation model epidemiology forestry geochemistry geodemographic segmentation geographic information system geography geology geospatial topology graph theory health human geography hydrogeology hydrology interpolation kaliningrad kriging landscape ecology leonhard euler line logistics meteorology mineral mining modifiable areal unit problem natural environment new zealand oceanography ore pedometrics petroleum geology pollution polygon remote sensing spatial dependence spatial network statistics topography topology urban planning urbanization