topic Re: Precipitation Grid in Water Resources Questions

Precipitation Grid

ConradoDe_León — Thu, 23 Jun 2011 15:53:47 GMT

Hi, I´m trying to create a precipitation grid to use as an input data for N-SPECT and I would like to know how to proceed. How can I create it if I only have the data from the meteorologic stations?
Thanks a lot for your time

Re: Precipitation Grid

MattMead — Sun, 03 Jul 2011 03:35:16 GMT

Spatial Analyst has several options for interpolating between point data. Cross posting this in the Spatial analyst forum might give you better results as to what method would work best for you.

Re: Precipitation Grid

ConradoDe_León — Tue, 05 Jul 2011 14:11:02 GMT

Thank you Matt

Re: Precipitation Grid

MichaelCiscell — Thu, 14 Jul 2011 17:30:03 GMT

You might check the PRISM site at Oregon State University for ready-made grids of the US:

http://www.prism.oregonstate.edu/

Michael

Re: Precipitation Grid

KarelBrych — Thu, 14 Jul 2011 19:47:00 GMT

You have to use Thyssen polygons.

Re: Precipitation Grid

MohammedMzahem — Tue, 25 Oct 2011 06:26:30 GMT

yes you can use Thiessen polygons
and create the grid shapefile.
and use the intersection tools from Analysis tools to get the data from Thiessen polygons to your grid.

Re: Precipitation Grid

MarkBoucher — Wed, 26 Oct 2011 13:32:45 GMT

You might check the PRISM site at Oregon State University for ready-made grids of the US.

I know the PRISM methodologies are extremely complex. They use regression on several variables including distance, aspect, elevation, etc. If there was a model in ArcGIS or if the PRISM method was explained enough to use ArcGIS tools to do something similar, that would be fantastic. The Thiessen method is well know and easy to use, but it does not take orographics into account.