Raster is a data format consisting of regular grids of values, usually stored in an image-like format.

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Add Rasters to a new GDB/Mosaic Dataset in ArcGIS ModelBuilder

I'm attempting to add rasters to a new mosaic dataset in a new file geodatabase, all in the same model. However, the Add Rasters To Mosaic Dataset tool does not recognize the NewMosaicDataset or the ...
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117 views

Raster layer - changing values in raster cells

I have a lot of cells in a raster layer (GeoTIFF) with a -9999 value in it. I would like to update that values to 0. I mean, in vectorial layers would be something like: CASE WHEN band1=-9999 THEN 0 ...
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30 views

QGIS Rasters - Filling no data cells [duplicate]

When making a sum between two raster layers, for every cell, if one of the two cells have no data in that cell, the opeartion is not done in that cell, example: In QGIS raster calculator I do: ...
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103 views

QGIS Raster Calculator, joining two raster

In QGIS raster calculator I do: Plus (+) And I get: The red circle in the middle is like cut in the result, QGIS it's not adding every pixel on each raster, it makes a kind of ...
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35 views

How do you symbolise a 32-bit raster in ArcObjects? [closed]

For rasters that are above 16-bit - you cannot apply a colormap. So what is happening when you symbolise in ArcMap a 32 bit raster - it's certainly possible. I'm trying to emulate this funcitonality ...
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31 views

Worldfile incorrect? Puzzler: all resources supplied!

Trying to manually create a worldfile for gif images of surface currents supplied by the navy here. I have QGIS and am decent at using it but the world file tool is failing without error on me (even ...
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277 views

Error adding MrSID raster layer to QGIS for Mac OS X 10.10.2 (Yosemite)

I want to add a MrSID layer to QGIS (version 2.6.1) with a computer running Mac OS X Yosemite. I installed QGIS through macports from the terminal and all python packages through macports, as well. I ...
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55 views

QGIS change raster tiles properties at once

I have a set of several raster tiles and I need to change the properties of each one, by setting up a transparency for instance. I have found no other solution but changing properties of each one at a ...
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152 views

Metric maps vs topological maps for path finding and UI rendering of indoor floor layouts

I'm building a software to map indoor floor plans of large facilities (like malls). I read through some of the questions on this forum, but my constraints are a little different than the ones ...
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107 views

SAGA GIS - raster image from Civil 3D

I am a new user of SAGA GIS software. I need to interface the Civil 3D 2015 and Hec Ras software in order to create a flooding map. In order to put in communication the two softwares, I have to use ...
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74 views

Generating ESRI compatible raster reference files in QGIS?

Backstory: employer is GIS incapable and most of the data we work with doesnt play nice with GIS software. That said, we have a client who is very GIS oriented. My boss (not my work) is providing them ...
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112 views

creating composite raster tiles from multiple vector layers as new background map in QGIS

I have been patiently restyling OS Vectormap product to create a map background I'm happy with, which i want to now use as a background for a leaflet map using QGIS2leaf. I understand that performace ...
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52 views

How to check if error due to no spatial reference of extracted raster? [closed]

I have raster file without spatial reference and I extracted my area of interest by shapefile that has spatial reference. And finally, I got extracted raster with spatial reference. can i assume ...
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25 views

Loading ordnance survey raster ArcMap [duplicate]

I have connected to the correct folder on ArcCatalog. Only the .tif files show on my ArcCatalog tree, but the .tlw files are in that folder too. How do I create a raster layer with this data? I ...
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28 views

How to identify downhill cells for a dispersing frog?

I'm hoping that someone on here can help me out with a task. First, let me set the scene. I'm working on a movement/cost analysis for frogs dispersing from 135 wetlands located in Maine's mountains. ...
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1answer
21 views

How to add terrain information to an existing project in QGis 2.6? [closed]

I have created contour lines and a hillshade layers and saved it as a vector and as a GeoTiff file respectively. However, when I try to add these layers to an existing project, nothing shows up. Where ...
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41 views

QGIS 2.6.1: “no enhancement” option not working on DEMs

When I import DEM raster layers and try to change the contrast to "no enhancement" I get a blank white image in the map window. Changing "black to white" to "white to black", the map remains a blank ...
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61 views

QGIS Web Client Raster not visible

I have loaded rasters from PostGIS and Oracle Spatial 11g with below script.Both layers are visible in QGIS Dekstop.My OWS settings are correct but the Oracle raster layers are not visible in ...
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93 views

Load Oracle Spatial Raster using PyQGIS

Able to connect to Oracle Spatial 11g and print tables with SDO_GEORASTER attribute both in QGIS python console and standalone application.I get below error when loading rasters from oracle Table. ...
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74 views

Saving fields after a raster join with python arcgis

I am working on a raster processing script in which i join a categorical raster with a table that includes some extra data on each category. After much hassle, I have the join working, but I can't ...
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96 views

Assigning score to raster based on cell overlap with other raster and field value

I have a set of rasters that I've assigned scores to individually (scored based predominantly on values of other fields). The scoring scale is the same for all rasters, but the factors that determine ...
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155 views

Transparency on black/white raster after clipping in QGIS?

I'm new to this forum and QGIS. I'ld really appreciate it if you could help me with my problem, since I couldn't find any solution online but people experiencing the same issue. It seems as if this ...
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67 views

Slope tool output has artifacts

So I've tried using the slope tool for a DEM using an appropriate Z-factor and the output is smooth, but it seems to be over-estimating slope angle. I would prefer to reproject the DEM (to NAD 83 UTM ...
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121 views

Reprojecting a population raster from LAEA to lonlat

I have a population density raster from the EEA which is based on the CORINE land cover 2000 data. ...
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1answer
142 views

How do you calculate a new field for a raster table based on value from a joined table?

I need to know whether it is possible to calculate a new field for a raster table based on a value from a joined table. Ideally I'd like to be able to accomplish this task without having to add table ...
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27 views

TIFFDirectory.getAsMetadata() is not including GeoTIFFTagSet. Any solution to this problem? — JAI

The source code appears to simply copy the TagSet List object to the IFD and then the TIFFMetadata. I don't understand where it is losing the tagset as it is in the list before the call. Anyone ...
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124 views

Using the accCost() function in R: questions regarding the transition layer

I am trying to use the accCost() function from the gdistance package in R. I load my cost raster using the raster()function from the raster package. According to the documentation, I need first to ...
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135 views

How to run GAM with raster package?

When I am using the raster package to predict a surface probability map of species distribution using the following functions in R, the following error occurrs: CA132122200=raster("F:/CBG ...
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58 views

Calculate raster mode with r.mode - problem with decimals

I am working with a raster file that represents the percentage of vinyards by commune (e.g., municipality) in a region in France. The statistics were calculated for each commune based on surveys from ...
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73 views

How to sum up values of neighbouring rasters? [duplicate]

I have a raster (25X25 meter) and I will make a new raster where each cell get the value of the sum of all the raster cells in a radius of 500m. I use QGIS. What is the best option to do this?
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130 views

QGIS Mac OSX version cannot batch write output files after rasterization

Happy new year everyone, I have been trying to batch rasterize a series of .shp files using QGIS for Mac OS X, and keep coming up against a strange problem. I am using the QGIS 2.6.1 user interface, ...
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89 views

Tiff Raster File slow to Load in Win 7 64 Bit QGIS 2.6.1

I have been unable to load a Geo Referenced Tiff file in 2.6.1, I have found it it will load but takes minutes, It will load quickly in 2.4 It is a Lidar file so it is large, about 14 gb in size, I ...
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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 ...
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91 views

Map Routing (paper route) [closed]

I am doing a undergraduate GIS project. It entails a paper route for newspapers in the Pittsburgh Area, so far I have plotted all of the points in a point layer. I have now plotted my points, what ...
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47 views

How can I equalize raster?

I've got 2 rasters , its seems that 1 has the data equalized (all values from 1-65535 are there) and the 2nd don't . Is there a process I can run in order to equalize the data in the 2nd raster ? ...
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53 views

Convert shapefile to multiple single-value TIFFs

I have a shapefile that is composed of multiple overlapping polygons that represent extent of habitats of certain species. Here is a 1 MB example of such file from International Union for the ...
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205 views

Conversion of Polygon vector files to Raster GRID 8 bit unsigned integer

I am trying to convert a polygon shapefile layer into Raster GRID with 8 bits and which is unsigned integer. I managed to convert the shapefile in ArcGIS with the Arc Toolbox Conversion tools, but the ...
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81 views

How can one modify map service legend (specifically raster layer)?

I've got the raster layer in my map service, which in fact is created automatically by asynchronous GP service as its output result ("View results with a map service" option). The raster is symbolized ...
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63 views

QGIS Raster moving when Majority filter

I'm running QGIS 2.01 Dufour on Linux Mint. Data & project are WGS84. I'm trying to smooth a grid & following other posts here I've used the Majority filter. This is looking helpful, but the ...
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45 views

Raster: how to locate cells having nodata

I am new to oracle spatial. I am using SDO_GEOR package's getNoData prcedure. the results are populated in following format. MDSYS.SDO_RANGE(MDSYS.SDO_RANGE(-32768,null)) My questions are: Is ...
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77 views

raster and vector misalignment

my vector and raster datasets align perfectly fine in Arcmap but not in QGIS, any suggestion on solving this dilemma is very much appreciated.
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21 views

QGIS Extract elevation data only for one country [duplicate]

I have a map built with a shapefile for country contours and a raster from .hgt files with elevation representation. How can I only select the area corresponding to the country? I found some thing ...
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34 views

Web Server/Technology to work with Raster-Imagery Data

I am in the process of designing a web application which will allow the end users to load raster imagery data (size range from 300 MB to 500 MB) as a back ground map and a corresponding OLD JPEG image ...
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159 views

Creating a Raster of Road Distance to Point

I am using QGIS 2.6. This question is in two related parts: I'm trying to create a raster of travel time from one point to another point travelling via the road system. Each raster pixel will roughly ...
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1answer
102 views

Defining polygons based on thickness maps using ArcGIS for Desktop? [closed]

I want to find and create polygons that demarcates three different inflection points in a thickness raster: where the thickness start to increase, where the thickness is at its max and where it starts ...
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39 views

Adding images to raster field in batch

So I've got about 300 records in an attribute table that each need an image to go with them. I've created a raster field on the table, and I've got all the needed images as rasters in the same GDB. ...
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23 views

Raster overview hierarchy in WMS [duplicate]

I have rasters with low resolution which covers the whole area, and in certain spots i have some rasters with higher resolution which covers small parts of the same are covered by the lower raster ...
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634 views

How to convert a 3-band image to a color-mapped one-band 8-bit image with ArcGIS or FME?

I have a 3 band image which needs to be converted to a 1 band image with colour-map so that I can assign different colours to the values. How can I first create a 1 band image out of RGB images with ...
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781 views

Permission denied when clipping raster

Trying to use raster extraction clipper to prepare a selected area of the map for generating contours - keep getting the error message: ERROR 1: TIFFOpen:everest_gmted30.tif: Permission denied ...
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70 views

“Points To Raster Tool”- Output pixel values differ from original point values

I am trying to convert an evenly spaced set of points to a raster using the "Points To Raster" tool in 10.1. Problem: Generally, the raster makes sense, but in some areas the cell values differ quite ...