Changing the values of the cells in a raster.

learn more… | top users | synonyms

1
vote
1answer
15 views

Reclassify a raster based on proximity to other cells in the same raster

Using Arc 10.2.2 with the Spatial Analyst extension, I have a single band, signed integer, 8-bit raster. I need to reclassify cells within that raster based on their Euclidean distance to other cells ...
-1
votes
0answers
44 views

16-bit raster reclassification using ArcMap

I have a 16 bit .img file. its a raster with 269 classes/categories representing clutter data on land. for example, industrial area is represented by bins of 2 m. pixel depth is 16 bit. What I want ...
2
votes
1answer
40 views

How to reclassify multiple ring buffer using ArcGIS ModelBuilder?

I want to automate some simple procedure in ArcGIS 10.1: create a multi-ring buffer around a point at distances 500, 1500, 2500, 3000, 10000 m. convert to raster reclassify the multiple ring raster ...
1
vote
0answers
24 views

python 2 polygon intersection

I have slope values derived from a DEM which I reclassified into NoDATA and vaules which I need. Then I made a polygon from this raster. I need to do intersection or something like that with the ...
1
vote
0answers
16 views

Reclassifying NLCD data, specifically open water

I've been working with NLCD data at a county level. My goal is to reclassify the pixels that fall under the open water classification. I've got a hydrography shapefile for the same geographic location ...
0
votes
0answers
30 views

Preserving Reclassified Values as Attributes?

What is the BEST way to preserve original raster values as attributes in the output raster when reclassifying? I see that this question has been asked before as Making reclassified raster layers ...
0
votes
0answers
16 views

multi stage reclassification

Consider there are two raster datasets that have been generated by kriging interpolation (Spatial Analyst toolbox in ArcGIS 9.3). One raster- (a) contains certain values 'x' and the other raster- (b) ...
1
vote
1answer
48 views

Reclassify raster pixels underlying certain polygons using Python

I've got a shapefile with many polygons, each of which exactly overlays a contiguous region of raster cells; an example in yellow: For some of these, I want to use the polygon as a sort of analysis ...
0
votes
0answers
27 views

Reclassify a density surface a variable range of values

I have a set of points with a 'weight' value. I want to create a density surface from these points, classify it with 5 or so bins (actual number is arbitrary, but smaller than the default output ...
0
votes
1answer
92 views

Reclassifying rasters to two values (1 and NODATA)?

I am trying to reclassify a bunch of rasters, but when I run my script arcGIS crash. What I want to do, is reclassify rasters this way: every accepted value (0,1,5 and 64) to 1, and the others values ...
4
votes
1answer
59 views

How to randomly reclassify raster pixel values in ArcGIS?

I have a raster dataset (USDA Cropscape dataset) where each pixel is given a crop or landcover type (eg, corn, rice, urban area, forest). Some of the pixel values are classified as more than 1 ...
0
votes
0answers
172 views

Raster Reclassifying Error 999999: Error executing function, The table name is invalid. Failed to execute (Reclassify)

I need to reclassify some raster data which was made from Inverse distance weight from points. So after getting the Inverse distances weight, I tried to run reclassify, but got: Error 999999: ...
4
votes
3answers
146 views

Adding two raster datasets that overlap while maintaining extent of larger raster dataset?

I am using ArcMAP 10.0 How do I add two raster datasets that overlap while maintaining the extent of the larger raster dataset. I have thought of adding zero values to the smaller raster to then be ...
2
votes
1answer
133 views

Reclassify a raster value to -9999 and set it to the nodata value using python and or gdal

I modified a script which reclassifies a raster. It is based on the script by Roger in his blog (the second script) and it works pretty well.The problem I am facing is as follows: I would like to ...
2
votes
2answers
200 views

Raster reclassify using python, gdal and numpy

I would like to reclassify a raster file from a raster with 10 classes to a raster with 8 classes using pyhton, gdal and/or numpy. The classes are represented as integers. I have tried following the ...
0
votes
0answers
74 views

How to reclassify raster data that falls within a polygon

Thansk for your response Okay so I will reword my question more clearly I'm currently using ArcGIS 10. My task is to map forest cover with the image classification tool. The problem is some of the ...
3
votes
1answer
75 views

Reclassifying a polygon using ArcGIS field calculator?

I am trying to reclassify a polygon into three classes: 1 and 2 = 5 3 and 4 = 3 5 = 1 I have been trying to do this by calculating a new field in the attribute table but I am very ...
0
votes
0answers
17 views

Reclassifiy raster in R [duplicate]

I have a raster file which has been classified from 1 to 255. I have to reclassify into binary form where 1 to 11 must be classified as 1 and the rest must be 0.How would I be able to do it in R. My ...
1
vote
1answer
89 views

Reclassify in QGIS using Raster Calculator?

I have downloaded data from the USGS to create a Map for a malaria risk in east africa but my question is only about the actuall Input in the Raster Calculator. I have a RFE Tiff that shows the ...
0
votes
0answers
53 views

Reclass by Table giving output with only 8 catergories

I am attempting to reclass a raster from a table (using the Reclass by Table tool in Arc 10.3). The output value field I am trying to reclassify to is long integer format with values ranging from 0 ...
5
votes
1answer
76 views

How can I reclassify a raster by zone?

I have a raster layer of a river network containing weighted flow accumulation values and a raster layer of lakes (see image bellow). I want to replace the values of all the river pixel that fall into ...
-1
votes
1answer
271 views

How to reclassify a raster in R?

wet<-readOGR(dsn=".",layer="shp") #wetlands r.raster <- raster() extent(r.raster) <- extent(wet) res(r.raster) <- 100 wet.r <- rasterize(wet,r.raster) #rasterize plot(wet.r) ...
1
vote
1answer
123 views

Getting aspect and reclassifying raster files using Python in a loop

By using Python in PythonWin 2.7.3, I tried to obtain aspect files of a list of raster files in a folder(called database_Dem20) and save it to another folder, database_Dem20/testOutput. In the same ...
0
votes
1answer
105 views

Batch reclassifying rasters in folder using ArcPy?

I am very new to python. I am using ArcGIS 10.0. I am trying to batch reclassify rasters in a folder and put the outputs into the same folder but with a new name(trying to do this using outputPrefix). ...
2
votes
2answers
337 views

Classifying DEM according to elevation in R?

r<-raster("DEM.tif") How to do the classification based on every ten meters for example and have different colors too?
0
votes
0answers
147 views

How to resample a raster by defined value?

I have got an Euclidean Distance Raster and I need to resample it. I work for a security company and I need a map with the camera resolution (pix/m) in every point of the map covered by a camera. What ...
1
vote
1answer
36 views

Saving Reclassed Intervals

Is there a way to save reclassed intervals done on-the-fly as a layer without use of the reclass tool? I lost the reclass intervals I've created on-the-fly.
0
votes
1answer
92 views

Explaining ArcGIS Raster to Polygon output?

I want create a new shapefile with selected fields found in a raster which depicts landcover. I first attempted to run Raster To Polygon. However, some class names no longer appear, as shown here: ...
0
votes
2answers
98 views

Arcpy reclassify label display issue

I have been looking for about 2 days and I can't seem to figure out or find a work around for the symbology labels after a reclassify when trying to automate maps. I run the following code and it is ...
4
votes
1answer
321 views

Reclassification of raster

Is there a better way to do this? I'm trying to create a script that will change classifications of a raster to: 0 for: 0,7-9,15-20,40,62-63,73,78-87,89-130,132-151,153-175,177-203,215,228,251-253 ...
0
votes
0answers
108 views

Stream buffer and reclassification

![euclidean distance and the layout highlighted(but they are two different layers)][2]I have this task to perform for hydrology analysis as presented below: DETERMINATION OF STREAM NETWORK AND ...
0
votes
0answers
122 views

arcpy Unable to remove directory. Possible causes: 1- Not owner of the directory 2- Another person or application is accessing this directory

Using arcpy and reclassify, I'm trying to run a loop reclassifying the same dataset accoding to different values. I've reduced this example to three loops, the original is much longer. import arcpy ...
1
vote
0answers
29 views

Errors when using the Corridor Designer tool from Arctoolbox [duplicate]

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
74 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 ...
0
votes
0answers
68 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 ...
2
votes
1answer
262 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
2answers
105 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
202 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
154 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
165 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
163 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
225 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
321 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
1answer
145 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 ...
2
votes
2answers
1k 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
126 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 ...
2
votes
1answer
539 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 from ...
1
vote
1answer
527 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
74 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
109 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 ...