1642GEOSTATS: sampling in ArcView
- Sep 13, 2000Can anyone suggest a procedure for randomly sampling an area in ArcView for
location of quadrats (sample units of a set area)?
My intitial reaction (although I do not know how to do it) is to somehow lay a
grid of blocks of a specified size over the area (or a set of points a specified
distance apart), get the grid intersection or point coordinates into a table,
and sample randomly from this table, which will give me a list of selected
points, each of which will represent a location for placement of the corner of a
quadrat when field sampling (the distance between points will be the length of
the side of a quadrat).
A neat solution would additionally let me lay the grid on and sample points only
within specified polygons, because the sample will be stratified by certain
polygon attributes (i.e., there will be different random samples from different
subsets of polygons).
I have ArcInfo coverages for the area in question, which I view and manipulate
in ArcInfo. I am not a GIS technician.
Stephen G. Bousquin
South Florida Water Management District
West Palm Beach, FL
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