Maptitude - http://research.umbc.edu/~roswell/maptitude.html
Louis:
>For my dot density map, I do not want Maptitude to take the total value to
>determine the number of dots by the break point and then allow Maptitude to
>allocate all of the points to the areas. Rather, I want a case by case dot
>density map so a true representation of each individual area is shown, not
>by the total area.
Unless you have one dot=one unit, there has to be some rounding. The fewer
units you have per dot, the easier it is to meet your requirements.
>Also, based on allocating the dot density theme based on the total area, how
>does the analyst interpret on a case-by-case
>basis when viewing the actual placement of the dots (i.e., how is the actual
>point placed based on the total value system). Is it based on centroid
>weighting based on the value or how?
Dots are placed randomly within the areas. You should not look at the
placement of individual dots, but at the density of dots. If the map user
starts counting dots, then a dot-density map is not the right method to
present the data. Use another thematic mapping method, possibly along with
labeling the areas with the count field.
Peter
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Peter Van Demark
Director of GIS Products and Training Phone: 617-527-4700
Caliper Corporation Fax: 617-527-5113
1172 Beacon Street E-mail: [EMAIL PROTECTED]
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