Latest Contributions by SteveLynch

‎01-15-2013

Phil 1) run the IDW Geostat geoprocessing tool and specify an output geostatistical layer name (eg. galyr) and don't specify an output raster name 2) run the SetModelParameter geoprocessing tool with - Input geostatistical model source = galyr (the ga layer you created above) - Parameter XML Path = /model/value[@name='Power']/@auto - Parameter value = true - Output model = c:\temp\optimized.xml 3) run the Create Geostatistical Layer geoprocessing tool with - Input geostatistical model source = c:\temp\optimized.xml - Input dataset = the feature class and field you used in #1 above - Output geostatistical layer = optimizedIDW This new GA layer (optimizedIDW) with have an optimized power value for the dataset and field supplied in #3 and to convert it to raster use GALayerToGrid geoprocessing tool. Regards Steve

‎01-14-2013

What happens if you inser a gp.BuildRasterAttributeTable_management(Temp_Raster) before the Lookup? The Temp_Raster might be too large for automatic table building (see http://support.esri.com/en/knowledgebase/techarticles/detail/27056 for limits) Steve

‎01-11-2013

The mask is applied post interpolation so it'll not have the same effect as a barrier. Try to reduce the number of vertices in your barrier. See tools in the Generalization toolset can be used to create a new feature class by smoothing or deleting some of these features. Steve

‎01-11-2013

Patrick Yes it can take a long time. The barrier implementation is using a line of sight approach. I.e. from the location where you want a value it'll "look" to see which points are "visible" and then use only those. It'll also depend on the complexity of the barrier featureclass, i.e. how many vertices and on the number of input points and then on the number of output cells. You should, however, first test how long it takes without the barrier. Steve

‎01-10-2013

- I guess you are in a geographic coordinate system (i.e degrees decimal), not a good idea as 1 degree longtitude <> 1 degree latitude. - default size cell produces an output raster of roughly 250 columns and 250 rows - with you changing the cell size to 1 will mean that your output raster will have roughly 1 row and 1 column - I notice that you are in a comma locale and using ArcGIS10, have you installed the latest Service Pack (SP5)? - 3.4e38 is a NoData value, which basically means that your output raster is empty. Regards Steve

‎01-10-2013

What is the default cell size that shows up in the dialog after you enter the ga layer into the control? Please also state clearly what happens when you run the tool. I'm not sure what you mean by "I have a similar problem." Thanks Steve

‎01-09-2013

Such features are available through the geoprocessing environment. I.e. when using GP tools. The Wizard, however, does not honor these environment settings. You could, however, use the layer that you created in the GALayerToGrid tool and specify an output extent in the environment and your output raster will then have this new extent. Steve

‎01-08-2013

If you are interested in mapping rainfall over southern Africa you should have a look at http://www.wrc.org.za/Pages/DisplayItem.aspx?ItemID=7656&FromURL=%2fPages%2fKH_AdvancedSearch.aspx%3fdt%3d%26ms%3d%26d%3dDevelopment+of+a+raster+database+of+annual%2c+monthly+and+daily+rainfall+for+Southern+Africa%26start%3d1 and http://www.wrc.org.za/Pages/DisplayItem.aspx?ItemID=8092&FromURL=%2fPages%2fKH_AdvancedSearch.aspx%3fdt%3d%26ms%3d%26d%3dMapping+mean+annual+and+other+rainfall+statistics+over+Southern+Africa%26start%3d1 Regards Steve

‎01-07-2013

ERROR 000863: Invalid GP data type". Patrick The barrier feature class must be polyline. You might be trying to use a polygon FC. Steve

‎01-04-2013

Delete all the temporary files in http://resources.arcgis.com/en/help/main/10.1/index.html#//0031000000p3000000 and reboot the computer. Run test on computer 1 and repeat the exercise on computer 2. How different are the times?

‎12-26-2012

Try using a smaller extent or larger interval

‎12-19-2012

What version of ArcGIS do you have? And, have you thought of using TopoToRaster which is in the Spatial Analyst toolbox? Regards Steve

‎12-17-2012

Use the IsNull tool. Output raster will be integer with a table and the count for value =1 will be the number of NoData cells and count for value=0 will be the number of cell that have data

‎12-17-2012

The most important factor for interpolation is that it only deals with a continuous variable. In other words something like rainfall or temperature. And not something like soil types or tree diameters. Cross validation should also be used to make sure that you are not totally wrong. Also, what do you mean by "seights"? Thanks Steve

‎12-07-2012

grid name can't have a space. Try changing ct_ma test to ct_ma_test steve

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Latest Contributions by SteveLynch

Re: Scripting IDW: optimize power parameter?

Re: "WEIGHT" field issue in Arc-SDM 10

Re: Interpolate climate surface from points

Re: Interpolate climate surface from points

Re: Ordinary Kriging Question

Re: Ordinary Kriging Question

Re: Universal Kriging with External Drift

Re: Co-kriging

Re: Interpolate climate surface from points

Re: Huge performance differences between computers (GA for ArcGIS 10)

Re: Error creating contour - failed to copy raster dataset

Re: Advice on best interpolation technique to use?

Re: Get count of pixels except no data values

Re: Best Interpolation Method

Re: Can't save rasters with output format GRID

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