Changing the values of the cells in a raster.

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2
votes
0answers
13 views

Errors when using the Corridor Designer tool from Arctoolbox

I am using the corridor Designer ArcToolbox for designing a habitat suitability model and I've got the following errors: Error 010328: syntax at or near symbol SPACE ERROR 010267; Syntax error in ...
1
vote
0answers
18 views

Options to use different Remap tables in a ModelBuilder or Python Script

I am trying to figure out if it is possible to embed multiple remap tables into a drop down type list or for an option to be selected to be used in a reclassify tool that outputs a final raster for ...
2
votes
3answers
168 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
340 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 ...
0
votes
0answers
12 views

Reclassify weighted sum values

I have using weighted sum to find areas to plant trees. The values I get out by using weighted sum are 0.7-0.9 in floating point. I want to be able to reclassify this layer so I can then use region ...
1
vote
1answer
107 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 ...
2
votes
1answer
59 views

Reclassify on land cover raster won't work

I'm new to GIS so I apologize if this question is basic but I couldn't find my answer online. I'm trying to reclassify a land cover raster from the National Land Cover Database. I want to reclassify ...
4
votes
0answers
36 views

How can I identify lines that intersect a certain raster layer area?

How do I identify certain roads ( of a line shapefile) that intersect with a layer that is produced from the reclassify tool (for raster data)? I am trying to identify which roads specifically are in ...
-1
votes
1answer
34 views

Classify Output Raster as percentage in arcGIS

I have water supply and water demand rasters.They are both of the same cell size and spatial reference. I need the ratio of water use to water demand. Then I want to classify this output in the ...
0
votes
0answers
53 views

Reclassify raster value

I'm curious if anyone has been able to change one individual value in a raster file? I'm using Arc 10.2 and trying to change the value 99 to -2 for 144 files using model builder. So far, I've only ...
1
vote
2answers
83 views

Reclassify values

I'd like to question about reclassify on this type of thing for ArcGIS 10.1. I tried this method but I know it gave me problems. I know this was from 2005 and ArcGIS has changed since then. My ...
0
votes
2answers
47 views

Understanding EOL while scanning string literal from Reclassify in ArcPy?

I'm trying to reclassify a raster using a Python script. I know I can just use the tool in ArcMap, but I want to start understanding the code behind it. Can anyone tell me why this doesn't work ...
0
votes
1answer
53 views

how to batch reclassify rasters with percents range

Using Model Builder I need to reclassify slope rasters with percents range value. I have read and ask here batch reclassify rasters with different elevation ranges, but I still need more explanation. ...
5
votes
1answer
134 views

When to use Con or Reclass

This question was stimulated by a discussion between WhiteBox and myself. Both Reclass and Con (i.e. a conditional evaluation tool) are examples of tools that implement a Switch statement or nested ...
1
vote
2answers
145 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 ...
1
vote
1answer
39 views

How to reclass aspect raster to float values

So I have an aspect raster that was created from a DEM. I'm trying to reclassify it using python, but I'm running into some issues. Here's the setup: I need to reclassify values in the aspect raster ...
1
vote
1answer
142 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 ...
2
votes
2answers
161 views

Reclassify rasters using GDAL and Python

Using @SS_Rebelious very useful answer, I am trying to reclassify rasters using GDAL and Python. I have a grayscale raster (with values ranging from 0 to 255) and I want to reclassify it to a binary ...
1
vote
1answer
66 views

Reclassification of raster surface using ArcGIS for Desktop?

I have a raster surface with values ranging from 0 -100. I want to create a categorical classification (percentage categories of 5%, e.g. 0-5%, 6-10%...) and reclassify my surface into these ...
4
votes
1answer
2k views

ReClassify Vector Data Between Values using ArcGIS Desktop?

I would like to be able to take all values between 1 and 10 and have a field define them as 1, and all values between 10 and 20 and set them to 2, how do I do that with vector data? I read how to set ...
1
vote
1answer
89 views

ArcGIS Raster Calculator output raster has one band but cannot build attribute table?

I built a raster using the raster calculator of ArcGIS 10.1 for Desktop. The properties of the output raster ("usle_1") indicate that this raster has one band. There is no attribute table but I ...
2
votes
2answers
48 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 ...
2
votes
2answers
63 views

Reclassify a rasterList and sum the reclassified value from each Pixel

I'm trying to write a script in arcpy which reclassified a List of Rasters. This rasters are made by another tool before so there is already a loop. Actually I get the error 000582 and before this ...
1
vote
1answer
76 views

How to make reclassified raster layers automatically display break values in their attribute tables?

I am using ArcGIS 10.2. I have many raster layers which I need to reclassify (using the quantile method), I Also need to know the break values of these reclassifications. I know that the break ...
3
votes
1answer
63 views

Why is the quantile reclassification method yielding classes of vastly different cell counts?

I am trying to reclassify many euclidean distance layers (which are based on lines) each into 10 classes of equal area. When I attempt to do this, using the quantile reclassification method, some ...
4
votes
1answer
91 views

What proportion of the 240m area sensed by MODIS must be forest before it is defined as forest?

MOD12 is a MODIS product at 240m resolution. Landsat produces 30m resolution products, which I resampled to 240m resulting in a raster of proportion forest cover in each 240m pixel (based on the mean ...
2
votes
1answer
42 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 ...
0
votes
0answers
58 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 ...
4
votes
2answers
2k views

How to reclassify a float raster?

I have three rasters which represent distance (in metres) from certain things (bus stops, parks, libraries). I would like to reclassify these rasters so that they get integer values based on the ...
0
votes
2answers
38 views

Reclassifying “service area” in ArcGIS Desktop?

I have created service area from few point, and now I would like to reclassyfy it, but when i try to do it I can see the message: ERROR 000864 Input raster: The input is not within the defined ...
11
votes
5answers
7k views

How to perform Raster Reclassification in QGIS?

Is there a way to do reclassify a raster image to Qgis? In Arcgis you can do that in Spatial analyst Tools→Reclass→Reclassify Any ideas?
2
votes
0answers
46 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
16 views

Creating Training Pixels in GIS [closed]

I have a map that I've built up. It contains an aerial photo for the background (raster) and it has layers of flight paths of birds on top of it. I want to: 1) classify each pixel based on whether ...
0
votes
0answers
22 views

distance surface with qgis on a binary raster map [duplicate]

I'd like to make a distance surface from a binary map in QGIS. I've got road network in a raster format where value 1 means road, 0 means anything else. How can i reclassify the map which indicates ...
0
votes
0answers
68 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).
-1
votes
1answer
115 views

IF-Statement in Field Calculator [closed]

I want to use an IF/ELSE-Statement to define a field in the attribute table of my raster. Therefore I have a field "VALUE". The condition should be: If "VALUE" < 4 ...then use die field "A".....if ...
0
votes
0answers
38 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 ...
2
votes
3answers
166 views

How to reclassify only a part of a raster but keep the rest unchanged (ArcGIS or R)

I'm trying to reclassify only a certain part of a raster...not the entire raster. Here's the problem. I have a LULC raster of the entire US. There are some issues with the raster that I want to ...
0
votes
1answer
47 views

ArcGIS difference reclassify tool properties symbology

Is there a difference between the reclassify tool and just changing the ranges of a layer within the properties>symbology?
2
votes
2answers
292 views

How to programmatically change raster symbology after reclassification?

I have created a code in Python that I will use for a custom tool in ArcGIS, the code will create a Eucledian Distance of 6000m around a point and Reclassify the distance from 0-2000, 2000-4000, ...
2
votes
1answer
287 views

How to reclassify a raster (tiff) with multiple bands?

i have a raster file containing information about the windspeed average for the year. My purpose is to reclassify the 15 classes based on their rgb-composite. The color is the only information given. ...
2
votes
1answer
205 views

How to use reclassify tool in ModelBuilder?

I have a model which buffers line features by a variable and then rasterizes them. I then need to reclassify before I am finished processing. My issue is that I cannot access the values to reclassify ...
4
votes
1answer
212 views

Reclass all values < 0 to -9999 in PostGIS

I have a tiled raster in a PostGIS table and I would like to change the value of all pixels which have values less than 0 to -9999. How should I do this? I suspect it involves ST_SetValue and ...
1
vote
0answers
218 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 ...
3
votes
1answer
722 views

How to reclassify raster inside polygon mask, leaving values outside as they are?

I am in the final stages of a landcover classification and need to reclassify thematic raster values that are inside different polygon masks, while leaving the values outside as they are. Can I do ...
0
votes
1answer
100 views

Integer rasters referring to the same scale

I'm using ArcMap 10. I want to display the area of simulated avalanches. I want this area to be divided in different colors depending on the thickness of the deposit. I managed to do that. But I want ...
1
vote
1answer
111 views

Global DEM and country borders

I am trying to split up the world into 2 categories based on elevation (below 2000m and above 2000m) while still including a country identifier. So in the end, I would like to have 2 types of units ...
0
votes
2answers
451 views

How do you use 'reclass' in GRASS?

It could be user error, but for some reason, the reclass tool is just hanging and hanging... QGIS 1.8 Compiled against GDAL/OGR 1.9.2 Ubuntu 12.04.1 Running the tool from the Sextante toolbox Input ...
1
vote
2answers
700 views

Problem Reclassifying Rasters

I need to reclassify some vector data which was made from Euclidian distance from points and lines. So after getting the Euclidian distances, I tried to run reclassify, but got: Error 001100 Failed ...
0
votes
0answers
46 views

How to reclassify raster data on a scale of 0-1? [duplicate]

I have various raster layers generated after using euclidean distance tool. How can I reclassify them on a scale of 0-1 instead of 1-10, etc?