Distance 8.0 Release 1

[lesgyug-debug]

Distance calculates EDR just fine, but does not produce correct densities (and therefore population estimate). It seems the problem is in the measures of distance and area entered.

When I enter distance as m and area as hectares, the answer is 1/10 of what it should be (because I have actual densities) (e.g. population estimate of 9 when the answer is really about 90). When I re-enter the exact same data in km (distance in km, and area in km^2), the population estimate is now 10 times the actual answer (900 instead of 90). Somehow, Distance is not interpreting the area and/or distances and relating them correctly. When I enter the same data in different units in a new project, it should provide the same answer, not a whole different answer.

My own workaround is to enter hectares as 10x the actual amount and distance in actual m, and that works.

I somehow can't think I'm the only person that has encountered this.

Thanks for any help.

[lenthomas]

Can you please check the units the data are specified in, in the Data tab. In the attached example (from the Ducknest project), area is in square miles, line length in miles and distances in feet.

If what's there is not what you expect, you can double click on them to change them.

If these are correct and you want outputs in different units, you can specify what you want in the Data filter, under the Units tab. You can see what units are being used to output effective strip width and density in the Results output, under "Density Estimates/global", "Measurement units".

Let us know what you find when you check these things.