Changing the values of the cells in a raster.

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2
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2answers
43 views

Merge classes using Reclassify in python

When I run the Reclassify tool from arcmap 10.1 and assign a 1 to each of the crop types it combines them into one class. However, when I try to recreate this in python it does not merge the crop ...
1
vote
2answers
75 views

batch reclassify rasters with different elevation ranges

I have about 500 elevation rasters, and I would like to use modelbuilder with an iterator to reclassify each raster into distinct elevation ranges (0-1m, 1-2m, 2-3m, 3-4m, 4-5m). I believe my problem ...
0
votes
2answers
79 views

Reclassify many rasters in ModelBuilder

How do I reclassify many rasters in ModelBuilder when each raster has its own unique values? For example, when you create a model in ModelBuilder and you add the Reclassify tool you may want to ...
3
votes
1answer
261 views

How to use raster calculator in ModelBuilder to batch reclassify hundreds of rasters?

I'm not sure what the problem is here. I'm attempting to use iterate by raster to feed all the files through a simple map algebra expression (I'm looking at data that indicates probability of ...
2
votes
1answer
33 views

strange banding in output raster after weighted overlay

I am trying to conduct a weighted overlay. I have two rasters, one is a continuous slope raster that I reclassified to have 6 classes (8bit signed integer), and one is an elevation raster that I also ...
1
vote
1answer
28 views

Reclassify says Unique values cannot be obtained from raster, using values from dialog?

I am using ArcGIS 10.2. Whenever I reclassify a raster layer I get the following message:"Unique values cannot be obtained from raster, using values from dialog". This does not prevent be from ...
1
vote
1answer
85 views

QGIS Slope Classification Issues

I am very new to QGIS for the primary purpose of creating a slopes layer so we know where slopes are above 15% or 20% or whatever we finally decide. I have used our DEM to create a slope geotif and ...
1
vote
0answers
39 views

Is it feasible to reclassify a raster which has been resampled/smoothed for display purposes?

Background: I have a Google Earth KMZ file which shows ground movements after an earthquake, arranged into discrete classes: From the KMZ file I'm able to download the original PNG images, which ...
1
vote
0answers
167 views

Saga Reclassify grid problem

I am using Qgis 2.1 ver. 5f5cd4c (64 bit version on win7 64) OSGeo installed. I was trying to reclassify a DEM in EPSG:32614. I used the SAGA's Reclassify algorithm in the processing toolbox. I ...
1
vote
0answers
243 views

Reclassifying a raster based on values in another raster

I am attempting to create a new raster based on the values of two rasters I have already created. I am using ArcGIS 10.1 Raster1 is an area with my true values. Raster2 was created by reclassifying ...
1
vote
0answers
183 views

Reclassify ESRI raster using variables from a SQL Server table (connecting with pyodbc)

I am trying to reclass a raster file (representing vegetation and land cover types) using values stored in a SQL Server Express table. I have a set of ~400 species records in the table, with each row ...
0
votes
0answers
40 views

How to reassign the values of a raster, based on the pixels of the raster beneath it?

In ArcMap 10.2.1, I have two rasters. Raster1 shows the extent of a habitat, and each pixel contains a categorical value for its land cover type (values 1-3). Raster1 has the smaller spatial extent of ...
0
votes
0answers
52 views

How to set raster values to NULL?

how can I define values to null? I tried it with the processing reclassify tool but I always get an error log (cannot open the result shape...or something like that).
0
votes
0answers
35 views

RemapValue Usage

I successfully produce and empty cost raster at the end of this script. I am fairly confident it has something to do with RemapValue parameters? Does anyone know why my out put cost distance raster ...