# Crop Pollination - 10 vs. 1 for highest suitability

sjc
Member

Hi there - I've completed a couple of successful runs using the Crop Pollination model, but I have a question about the required lulc.dbf. I noticed after running a model the cell in my lulc.dbf that held the floral resource suitability value for

"developed land" converted the 1 I assigned to a 10 (so, "developed land" should have been given a 1, indicating highest suitability, but instead it was assigned a 10). The model ran with the 10, and I'm wondering why I didn't get an error. Aren't the suitability values only allowed to range between 0 - 1?

I should add that when validating the model against field collected data I am getting R2 > 0.5 and p-values < 0.05 when using the 10 for the suitability of "developed land". When I change that suitability value of "developed land" to 1, I am getting R2 < 0.3 and p-values > 0.2. Quite the difference!

"developed land" converted the 1 I assigned to a 10 (so, "developed land" should have been given a 1, indicating highest suitability, but instead it was assigned a 10). The model ran with the 10, and I'm wondering why I didn't get an error. Aren't the suitability values only allowed to range between 0 - 1?

I should add that when validating the model against field collected data I am getting R2 > 0.5 and p-values < 0.05 when using the 10 for the suitability of "developed land". When I change that suitability value of "developed land" to 1, I am getting R2 < 0.3 and p-values > 0.2. Quite the difference!

Post edited by sjc on

## Comments

I think the high R and low p values are meaningless in the case when the suitability score is 10. That's an order of magnitude higher than a meaningful value, so I'm not certain that the R/p scores mean much.

Are you using the ArcGIS-based version of the model or the InVEST 3.0 version?

While the ArcGIS-based model does not validate the inputs, the InVEST 3.0 version of the pollination model does do a lot of up-front error checking, including checking for floral resource values between 0 and 1.

I would encourage you to try the InVEST 3.0 version of the pollination model if you are not already, as it is over 10,000 times faster than the ArcGIS version.

Please do keep us posted as any other issues come up!

Any chance you're using 32-bit InVEST 2.5.4? If so (and you're on a 64-bit computer), you may want to check out the 64-bit version of InVEST (here's a link to 64-bit InVEST 2.5.5). The 64-bit version should allow you to use very large input rasters.

Let me know how it goes!