Questions tagged [nodata]

"NoData" is a term for null values in raster datasets.

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1answer
262 views

Set NoData values to -999 in ArcGIS 10.3 [closed]

I know how to set a value to NoData using SetNull, but how about the opposite? If I had cloud pixels in a Landsat scene that are currently set to NoData and I want to set them to -999 (an extreme ...
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3answers
8k views

Removing nodata value from raster images?

I'm doing urban change prediction in Land Change Modeler (TerrSet software), and i can't run Transition Sub-Model. I don't know why, but I think it is because I have nodata value in Variable (slope ...
1
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1answer
234 views

How to remove multiple nodata value in ArcGIS?

I have a raster with black, white and red which represent no data value. I can remove them with ArcGIS using Nodata but i can only do that for only one color. Is there any possibility to remove ...
24
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3answers
4k views

Major bug in ArcGIS Zonal statistics?

Update: The bug has been fixed in the ArcGIS 10.4 release I am using ArcGIS 10.2.2 to determine zonal statistics for a number of zones. If there is any NoData in the value raster, I want the zone ...
1
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1answer
693 views

How to force GeoServer to remove, or change, NoData Value from GeoTiff?

I am trying to display vector data of state borders, downloaded from GeoServer as GeoTiff, in QGIS. By default downloaded raster looks like this: After disabling NoData value in raster->Properties->(...
7
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4answers
7k views

Converting NoData to 0 values in ArcGIS Desktop?

I have a raster of landcover that I have reclassed and the different land cover classifications are now represented by numbers which correspond to fertilizer inputs. Using ArcGis 10.3, I am trying ...
1
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2answers
7k views

Adjusting extent of raster using ArcGIS Desktop?

The coloured file contains landuse information and it needs to have the same number of columns and rows as the DEM in the background for further processing. I can't get it to work - "clip" and "...
1
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1answer
2k views

How to use gdal.FillNodata in python?

I am trying to use gdal.FillNodata in python on a ".tif" raster. The nodata value is set to -3.402823e+38. Here is my code : import gdal from gdalconst import * ET = gdal.Open("ET_sample_reclass.tif"...
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0answers
1k views

Convert polygon to raster and give value to null cells

Is there a way to convert polygon features to raster while also populating null cells with a specific value? As in, can I create a raster from a polygon shapefile and have the tool populate all null ...
3
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1answer
458 views

Setting raster values to NoData when raster does not have valid statistics?

I have a floating point raster with some values of 99999 that I want to set to NoData in Arc 10.2.2. I've tried using the SetNull dialogue box, the SetNull arcpy function, and the Raster Calculator ...
2
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1answer
2k views

How to change no data value from -32768 to -3.40282e+38 in raster in QGIS?

I am trying to change the null values of a raster from -32768 to -3.40282e+38 in QGIS. I tried using warp tool setting the no data values to my desired number but it did not change it. Then I used ...
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0answers
234 views

GDAL conversion to Terragen outputs file full of zeros?

I recently learned some gdal command line syntax in my attempt to convert some geotiff files to the Terragen format. During my first attempt I noticed a message about nodata values: gdalwarp -of ...
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0answers
68 views

Managing or Reducing noise in a mosaic raster

I have created a raster with the Mosaic to New Raster tool from 3 separate rasters. However in my mosaic I have some consecutive pixels which seem to be the noise of the previous procedure. Is there ...
4
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2answers
319 views

Extract from raster by tightest rectangle mask without Nodata

I'm using ArcMap 10.2.2 and I have a raster that has Nodata around the edges. How can I extract the tightest rectangle from this raster that does not include Nodata? The screenshot may help ...
2
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1answer
33 views

Combining several raster files generated from polylines

Maybe I'm just missing the point somewhere... I'm working on a path distance analysis, specifiying the cost layer. For this I have built a model, where I have roads and trails, both polylines, that I ...
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2answers
617 views

Dealing with NoData Values in Arcgis

I have a set of rasters which I want to calculate mean of them,these rasters has some NoDate values,I have two approaches first using this code in raster calculator I interpolate them Con(IsNull("...
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0answers
52 views

Using r.neighbors on borders

I have a raster file with pixel size 30 x 30. At the upper border there is half row with "no data" pixels. I want to use the mode function to replace them. I have only thought r.neighbors (from grass) ...
10
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4answers
4k views

Setting NoData for a multiband raster?

I have an RGB orthoimage that has black area instead of NoData, as pictured here: When I use the SetNull tool, it does remove the black area, however it then turns it into a grayscale orthoimage, ...
0
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1answer
260 views

Mosaic to New Raster not allowing correct overlap

I am not sure what exactly is causing hiccups for me - how I processed the data (removing the white edges in 3rd party software), the bit depth (8bit), the file format (png to support transparency), ...
7
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1answer
3k views

Change NODATA pixel value in raster to arbitrary value

I want to change the value in all pixels that are currently 0 to 800 in QGIS 2.6.1. 0 is listed as the no-data value in Properties > Transparency. I have unchecked the No Data Value box there. Then I ...
2
votes
1answer
446 views

Arcpy reclassify all values to same number

Using ArcGIS 10.1 and arcpy, is there a way to reclassify all values of a raster file to the same value (leaving NoData Values as "NoData")? Lets assume that I have no way of knowing what the actual (...
3
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1answer
2k views

Creating a mosaic with gdalwarp - How to deal with no data and overlap

I want to create a mosaic of satellite imagery in .tiff format. I want to create an actual mosaic, not a vrt, because afterwards I will cut the image in to tiles that make sense for my users. Gdal ...
5
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1answer
9k views

how to allow null values in a feature-layer

I'm using ArcDesktop 10.2. I have 30 x,y locations that have 20 fields of numeric data, stored in an Excel spreadsheet. Some cells have no data, and I want those cells to be represented as null values ...
2
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0answers
4k views

Python Band.SetNoDataValue(), sets all bands at once

Can someone tell me what I am doing wrong? I want to set bands 1 and three to 255, and band 2 to 0. The code below only should only set band 2, but gdalinfo shows that all bands get set to 0. Ubuntu ...
3
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0answers
940 views

SetNull in Python script for Arcgis assign 0 value [closed]

I am writing a script in Python where I assign to few Tiff defined in a function as inputRaster a NoData value as follows: whereClauseSetNull = "VALUE > 100" outSetNull = SetNull(inputRaster, ...
4
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1answer
260 views

Raster cells with no data being generated by las2dem?

Anyone has an idea where these lines (with no elevation data) come from? They are generated while using the las2dem tool from LAStools. What needs to be done to avoid this? The raw data (.las file) ...
2
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2answers
2k views

Raster clipping without producing no data values

I'm trying to clip a raster in ArcMap using a polygon, and I'm wondering if there's any way to have the resulting raster not include any "no data" values (I apologize for the poor grammar). My process ...
2
votes
2answers
4k views

QGIS Raster Calculator: Need values to be set to 0 instead of no data

I have a landcover map with different values for the landuse options e.g. 190 for commercially used areas. Now I want to extract only these areas using the Raster Calculator with the expression "...
4
votes
1answer
1k views

Changing raster cells values inside of a polygon to the closest cells just outside the polygon!

I have been wrestling with this for a while and couldn't find out how I can do this. I want each cell of a raster inside of a polygon boundary to have the value of the closest cell just outside of the ...
1
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3answers
818 views

Nodata issues in map algebra

A dummy question. I need to change all values in my rasters into ones. I've been able to do this fine in the Rater Calculator just by multiplying the layer by zero and adding one (my_layer*0+1), but ...
0
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0answers
278 views

Getting GDAL Color distortion around nodata value stitching?

I am trying to extract JPEGs from SID images using GDAL. I ran into a an issue where black lines were present and figured out that it was a nodata issue, so I added -src/dst/vrt nodata arguments and ...
2
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0answers
118 views

Set Default Transparent Pixels in QGIS?

Is there a way to set QGIS to automatically load in images with no data values of (0,0,0) as transparent instead of black? I've looked through the forums, tried saving a .qml file out, looked through ...
2
votes
0answers
772 views

NoData specification via IEEE NaN in GeoTIFF for ArcGIS

I am a programmer exporting 32-bit floating point GeoTIFF rasters from my own application that my users need to read into ArcGIS. Unfortunately I am not an Arc user myself and have zero expertise with ...
2
votes
2answers
86 views

Delete numerous NoData rasters from database

I've got >1000 rasters in a folder with about 10% containing no data. I'm looking for a method, preferably through ArcGIS (also open to QGIS, GDAL, etc.), to run through the folder and delete all of ...
3
votes
1answer
852 views

Where is qgis getting the NO DATA value from?

I have a project that contains an 8-bit paletted layer (call it the mask layer) and a float 32 single band layer (call this the clip layer). I create a new raster by using the raster calculator, ...
5
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2answers
2k views

Merge two rasters with no data value

I have two rasters: Raster A and B. Raster A has has only values of 0. The white area in Raster B are No Data values. I want to merge them to one raster (Raster C). So basically I want all pixels in ...
1
vote
2answers
36 views

working with hydrography raster the cost array ignores the end of water

We have our maps laid out using hydrography maps from NOAA. We had to run the graphics through several steps to create the water feature raster. I have a process that pulls in that raster, sets a ...
6
votes
1answer
1k views

Generate hillshading with GDAL, and respect nodata

I'm still trying to nut out this problem of merging overlapping geotiffs. From the original dataset (here, a 20m resolution digital elevation model of the state of Victoria), I have reprojected it ...
2
votes
2answers
976 views

How to merge rasters with nodata cells in Arcgis

I want to create a single attribute table base on multiple overlapping raster. Some raster do not overlap completely but have common areas. In that situation I need the value from other raster while ...
6
votes
2answers
4k views

How to display NoData of a raster in QGIS

How can I show raster pixels with NoData value in QGIS? In ArcMap there is a button to choose the color for the NoData value. Is there something like this in QGIS?
13
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3answers
8k views

How to change null values raster values to 0 in QGIS?

I need help... I'm having problems with QGIS. I have some rasters that appear to have null values, even though I reclassified them to obtain a boolean raster :( How can I change the NULL values to 0?
8
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7answers
21k views

Redefining nodata value into zero in QGIS?

I have an image which i cliped with an AOI polygon. The contour area was set to pixel value = 0 and I have a nodata value of -32768. I want to redefine the nodata value into zero. I used to do this ...