Tag Info

New answers tagged

0

If you're already familiar with the upstream trace tools, you should be able to apply the following steps: Create a constant raster. A constant value of zero is a convenient number. Subtract the elevation raster from the constant raster, leaving you with an inverse of the elevation raster. If you used a constant value of zero, your inverse raster is now a ...


1

There is a tool in the free and open-source (GNU GPL licensed) GIS Whitebox Geospatial Analysis Tools that can identify the flowpath from any point or collection of points specified either as a ShapeFile or as a categorical raster. The tool is called Trace Downslope Flowpaths: The tool takes a D8 flow pointer (flow directions) grid as an input, which ...


0

For symptoms like these in shapefiles, or feature classes (of file or personal geodatabases), and as you have noted in a comment, the tool to use is Repair Geometry (Data Management) which is available at all license levels: Inspects each feature's geometry for problems and fixes the problems that are found. The Clean tool mentioned in the other ...


2

It's likely the result of a topological error in the original vector file. If borders don't align perfectly, and remember that in most vector formats coordinates are stored to a very high level of precision, then errors will result in the dissolve output. This is the most common problem when running Dissolve operations. They can usually be fixed with a ...


0

I believe that a sieve approach would work for you. This is a much more robust way to establish a MMU (minimal mapping unit) or filter data that focal approaches.


0

I am not certain that what I say here is correct but since this question has remained unanswered for over eight months I will give it a shot. From reading the reference you cite and also HowTo: Create a PMF that can be opened in ArcMap, it sounds to me like when a *.pmf file is written by the Publisher extension to ArcGIS for Desktop a choice is made as to ...


0

I figured it out. I was trying to add the returned list (the 'listofOIDs') to another outside list along these lines: currentResults.ListOfOIds.Add(iterateTheOIDs(selectionSet.IDs) instead of: currentResults.ListOfOIds = iterateTheOIDs(selectionSet.IDs) which would have created a list inside of a list (a list-ception, perhaps?) Oops!!


1

Seems like you have not initialized the list using New. Dim listofOIDS As New List(Of Integer)


1

As of ArcGIS 10.2.1 for Desktop, you can use Alter Fields (Data Management) with an Advanced level license to: to rename fields or rename field aliases for any geodatabase table or feature class The same tool became available to Basic and Standard level licenses at ArcGIS 10.2.2 for Desktop.


2

From my collection of ArcGis 9.3 python scripts: import arcgisscripting gp = arcgisscripting.create(9.3) Shape_A = "c:\\some\\path\\to\\shapefile.shp" Shape_B = "c:\\some\\other\\path\\other_shapefile.shp" Intersection = "c:\\output\\path\\output.shp" gp.Intersect_analysis(Shape_A + ";" + Shape_B,Intersection,"ALL","#","INPUT") You will need to change ...


1

You can do with arcgis project(Data Management) tool . It will convert from one coordinate system to any other. Go to arc tools and search for Project tool in Data management and give in put your vector file and give output coordinate system whatever you want based on your your requirements.


3

EDIT Sept. 1, 2014: I have modified the code so that it would work with any field of any type where the typical blank values for each respective type are replaced. Testing for Null values is done first and separate from other tests, since a Null will cause any of the other conditional statements to throw an error. I left out a test for a blank currency ...



Top 50 recent answers are included