topic Re: How to create pivot point from fields in a feature class to rotate a raster? in Data Management Questions

How to create pivot point from fields in a feature class to rotate a raster?

RitchieEyster — Fri, 18 Mar 2016 16:06:37 GMT

I have a feature class that contains all attributes of a given raster dataset. I need to rotate the raster dataset about the center of the raster. I have the center x and y values and need to create the pivot point from these values.

Re: How to create pivot point from fields in a feature class to rotate a raster?

DarrenWiens2 — Fri, 18 Mar 2016 16:15:28 GMT

I assume you've found the Rotate tool and want to use the optional pivot point parameter. Doesn't it work to type in the xy values you want to use?

edit: I'm not sure what this means: "I have a feature class that contains all attributes of a given raster dataset." You do have a raster to rotate, correct?

Re: How to create pivot point from fields in a feature class to rotate a raster?

RitchieEyster — Fri, 18 Mar 2016 16:29:16 GMT

I have the rotate tool but I am doing this in Modelbuilder. I would like to automatically create the pivot point from the x and y values for each of the 339 rasters that I have .

Re: How to create pivot point from fields in a feature class to rotate a raster?

DarrenWiens2 — Fri, 18 Mar 2016 16:35:55 GMT

Then you'll have to use an iterator, collect the pivot point coordinates in a variable, and pass those using inline variable substitution. But, that's about as much help as I'll be with Modelbuilder.

Re: How to create pivot point from fields in a feature class to rotate a raster?

RitchieEyster — Fri, 18 Mar 2016 17:31:40 GMT

Thank You Darren. I believe I have it working now.

Re: How to create pivot point from fields in a feature class to rotate a raster?

FrankHanssen — Thu, 28 Apr 2016 08:21:58 GMT

How did you collect the pivot point coordinates in a variable and define the inline variabel?

Frank

Re: How to create pivot point from fields in a feature class to rotate a raster?

FrankHanssen — Thu, 28 Apr 2016 14:12:26 GMT

I figured out how to do this. But the output pivot point was not in real coordinates. My input raster is in UTM33 (WGS84).

Re: How to create pivot point from fields in a feature class to rotate a raster?

FrankHanssen — Fri, 29 Apr 2016 07:39:10 GMT

To get real coordinates for the pivot point use:

def fn(Input):

import arcpy

myRaster = arcpy.Raster(Input)

ext = myRaster.extent

midx = ext.XMin + ((ext.XMax - ext.XMin) / 2)

midy = ext.YMin + ((ext.YMax - ext.YMin) / 2)

return "{0} {1}".format(midx,midy)