1. CreatedBy:V. fernandez-Rogers2015
Chase Johnson2015
SRTM withgridlookslike this
Problem:Rastersare grouped byvaluesandnot individual raster.
Solution- Create gridthat overlaysthe individual raster.
(Iwill nottell youhowwe createdthe grid because itiswrongand we couldnot figure outhow to make it correctly.
Insteadwe solvedthe probleminaroundaboutway.)

2. Problem:Gridlinesnotcenteredontopof SRTM Raster.
Solution:Create centroids,Create Thiessenpolygon
Procedure for creating centroidpoints
In the map document, open the attribute table for the polygon feature class.
In the attribute table,navigate toTable Options> AddFieldandadd two new fieldsof type Double.Name one 'Latitude'
and the other 'Longitude'.
Right-click the Longitude field and select Calculate Geometry.
In the Calculate Geometry dialog box, select 'X Coordinate of Centroid' from the Property drop-down menu. Click OK.
Right-click the Latitude field and select Calculate Geometry.
In the Calculate Geometrydialogbox,select'YCoordinate of Centroid'fromthe Propertydrop-downmenu.ClickOK.
Exportto a table.
A. In the attribute table,selectTable Options>Export.
B. Specifyaname and locationforthe newtable.
Make an XY Eventlayer.
A. Navigate toArcToolbox >Data ManagementTools> Layersand Table Views>Make XY EventLayer.

3. B. Addthe newtable (fromstep7) as the XY Table.
C. For the X Field,selectthe Longitude field.
D. For the Y Field,selectthe Latitude field.
E. Name the neweventlayer.
F. Selectthe spatial reference orcoordinate system.
G. ClickOK.
(Optional) Exportthe EventLayerto a shapefile byright-clickingthe layerandnavigatingtoData> ExportData
Create ThiessenPolygon
OpenArctoolbox ---AnalysisTools--- Proximity—Create ThiessenPolygons