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

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11 views

Created raster with not expected range

I have created a raster layer with kriging tool as source of data have localized sapefile attached and shown in Figure. Why the value range and are produced raster information is irrelevant to the ...
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19 views

Raster colormap setting in Arcmap not honored in GP tool

I am working with digital versions of paper maps. Here is what I am attempting to do: In Arcmap determine the value in a raster's colormap that is the undesired black mask / "no data" section. Set ...
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25 views

Using numpy.dstack() for merging two 3D arrays but losing spatial reference.

The code is as following: >>> temp = numpy.dstack((spi_negative,spi_positive)) >>> >>> temp.shape (16, 126, 294) >>> out_ras = arcpy.NumPyArrayToRaster(temp,pnt,...
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54 views

Using arcpy.CopyRaster_management function convert raster to 64-bit raster?

I am writing a Python script tool that takes a raster as an input parameter. I want to use this input to create a constant raster that is saved to an output geodatabase (which is another parameter). ...
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34 views

Add raster layer or a WMS using geotools - problem to run the jar file from cmd

I am using geotools in order to develop a custom GIS. So, i tried to add a raster layer and a WMS based on the tutorials given by geotools. When i am running the project using the main class in ...
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43 views

geoserver load image mosaics tiff files

I have a massive amount of tiff files (+prj. all together 100k). For test purpose I have loaded a small bit of these into geoserver and worked fine. But when I try to add to the store the data folder ...
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32 views

How to iterate a raster calculator with a change in the input raster and in the values calculated? Than, how to put the results in a table?

What I do without iteration is the following: Change radiance to reflectance for band 3 with raster calculator Samething as #1 on band 4 (the values in the formula are different from #1) Calculate ...
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51 views

Clipping raster without create new table in PostGIS?

I'm learning about PostGIS, and I would like to create a SQL to cut a raster with a shapefile to work in my R program. I managed creating a new table, but I would like build it without a new table. ...
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24 views

GRASS: strange classification output and reject map from “i.maxlik”

I am trying to perform a supervised classification with "i.maxlik". I have three bands: 1) elevation (a dem); 2) reflectance (derived from Landsat ETM+ band4); 3) cumulative solar radiation (derived ...
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43 views

Convert Raster to other format No data problem (ArcGIS)

I am converting a raster tif file into other tif file with JPG compression to reduce the size. The original file have a NO-Data value. after conversion some areas have almost black color (1,5,1), (2,...
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99 views

How can I smooth a discrete raster in ArcGIS?

I started with a continuous spline raster of hotspots, classified by standard deviations from the mean. This displays as 7 classes, but since it's a continuous raster in ArcGIS 10.2, it appears nice ...
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32 views

How do Arc Grids and file geodatabase rasters differ?

I know that they are stored differently, but I'm interested in comparisons such as storage capabilities, access speed and data types. I've searched the web but haven't found any such technical ...
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69 views

'Extra' Pixel in Nightlight Raster Data

I am new to GIS and working with gridded data so please excuse me if my question is simple or if I miss an obvious point. I want to work with 30 Arc Seconds Nightlight Data (my data comes from NOAA: ...
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108 views

Error to add store through cURL REST API too geoserver

I have problem with adding raster layer to geoserver automatically. I need, that geoserver add layer without person job, only script action and i saw that it may be done with cURL REST API but, i can'...
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30 views

Aster DEM damaged file (N30 E041)

I tried to merge several raster data sets ( from Aster GDEM), but one file is possibly damaged and I get a hole in my raster, see here https://www.dropbox.com/s/ypos9zhmsny476b/...
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26 views

Loading rasters using agent analyst

I'm new to agent-based modelling, but have been using GIS for a number of years now. I am trying to create a simple model that shows the potential loss of salmon from a number of locations due to ...
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86 views

Improve Slope Raster Precision?

Im working with ArcGIS and i have a raster layer created with just four points in XYZ, the plane that forms between these four points has a slope of 10 percent. When using the tool SLOPE (3D Analyst> ...
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33 views

USGS Raster Conversion with GDAL Returns Blank .TIF File

I am new to GIS systems. I installed GDAL to convert .ADF files to .TIF files to obtain image heightmaps. It outputs a GeoTIFF .TFW file that I can't open, and a .TIF file that is blank (all white). ...
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35 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 ...
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16 views

need to clip multiple USGS quadrangles in Geotiff format to statewide index in polygon format

I need to trim the collars off of many USGS 7.5 minute quadrangles for a state. I have the quads as GeoTiffs and have the polygon boundary for the whole state. I think there are about 1446 quads/...
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38 views

How to test if a point shapefile is in a raster in ArcMap using Python?

I have a shapefile where the features are points. It should be about 500 points. All of this points are on top 5 different rasters. Some points are in one raster, but some others are not. I need to ...
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29 views

Spatial Join Points Vector with Raster Dataset using Arcmap

I have a points file of taxi drop off locations and a raster file grid. I am trying to get a count of each point on a raster cell. How do I go about doing that? It is like I am doing a spatial ...
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35 views

Strange display of raster in ArcMap

I have a Raster file jp2, in the full zoom there is a strange black dots on the border of the raster, but keep zooming these dots disperses see images
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27 views

DEM Mosaic Dataset Processing - Output Surface and Hillshade raster to same extent as input raster tiles

I have a lot of DEM rasters, tiled adjacent to each other. I would like to make a surface and a hillshade raster to the same extent as each DEM tile. Current issue: processing on a tile-by-tile basis ...
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63 views

Convert raster to polygon then join attributes

I'm trying to convert IMG files to shapefiles, then joining the attributes of the IMG file to the new shapefile. I got the conversion part to work, but am a stuck on how to join the tables. I have ...
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9 views

Stretched raster bar appears divided

When I add a raster bar to a legend on a map, the bar appears divided in two parts, anyone knows how to fix this?
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50 views

Generating outlines of islands using QGIS?

I have a (raster) satellite image showing islands. I wish to extract the boundary (shoreline). I tried a simple classification with just two groups (land and water). Unfortunately too many ...
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69 views

Problem with stretched value and classified value in ARCGIS desktop? They are different than each other

I want to classify the value of an image into 3 groups. when I check properties of a raster image, stretched value is different than classified value. Here I have uploaded the images as follow. I ...
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70 views

Importing array directly as raster to PostGIS in memory?

Below is python code I wrote to import downloaded rasters into a postgis table using raster2pgsql. I have a question involving efficiency. Instead of writing the raster to disk after doing array ...
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49 views

Adding Raster by raster calculator gives no values

I`m trying to add several raster files to one (like a merge). I tried using the raster calculator (in ArcGIS 10.2.2 and in QGIS 2.8.1 and QGIS 2.10). Anything I do leads to rasterfiles which have only ...
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24 views

Monthly GIMMS composites (example code doesn't run through)

Are there anyone familiar with r package 'gimms' ? I am trying to run this code: https://github.com/environmentalinformatics-marburg/gimms but I cant produce the monthly composites. The code gets ...
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27 views

Raster of masked area to polygon shapefile in R

I have masked() two rasters (Landsat scenes), so that I have a new raster that covers the overlapping area of both. Now, I would like to transform the overlapping area into a polygon shapefile. Do ...
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31 views

Is it possible to reclassify rasters manually?

Is it possible to change raster cell values individually or as a group? Currently, I am digitizing around cells I want to change and then doing a polygon to raster conversion and then a merge to ...
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43 views

Changes in TIN and Lattice between ARC/INFO Version 4.0 and ArcGIS 10.1 for Desktop?

Our team surveys a sedimentation pond every year to assess change in storage volume (or dredged volume), and we've been doing the same survey for decades. We survey x,y,z points, create a TIN from ...
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95 views

How to “mosaic” rasters and keep attributes

I have individual 10 m raster files (with both quantitative and qualitative data) for each state and need to combine them into a national dataset. But, when using a mosaic it seems that the attributes ...
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48 views

GeoServer ImageMosaicJDBC: Result set after last row

I am using the ImageMosaicJDBC to access raster data from an oracle database using ojdbc7. in my log I get the following error: INFO | jvm 1 | 2015/10/28 18:57:22 | 28 Oct 18:57:22 ERROR [...
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43 views

ArcGIS raster-based districting for equal population districts: cost allocation?

My goal is to define 13 starting points as centers from which 13 continguous, non-overlapping districts will "spread out" across a raster (containing population data for each cell) until each district ...
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103 views

Geoserver raster as wms has blue-ish appearance when black background is visible

I have a problem with a blue-ish overlay color over my WMS layer that only is visible if there is part of the image background (nodata area) in the requested map extent. The original image is a ...
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10 views

Raster layer underneath others

I have a TileMill project going. It's my first one ever. I have a raster layer in my map which I got from here. Unfortunately, it covers/hides all my labels. Is it possible to order layers? So that ...
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47 views

NDVI Raster to Polygon - What's the deal with the color ramp?

So I'm following this tutorial. At the end, the color ramp is strange. See 7:48 for the content table, and it seems the ramp resets every ten numbers. I'm wondering if I should be re-applying the ...
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66 views

Trimming downloaded Worldclim Climate Projection Layers to specific area in QGIS for use in Maxent Program?

I am very new to QGIS and modeling. I have downloaded many Future Climate prediction files(GeoTiff) from Worldclim. I only need to use a small portion of the globe, but they do not allow for the ...
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26 views

Exporting Raster Column

Probably an easy solution here I just cannot think of one. Using ArcMap 10.0 So I have a feature class which has 5 columns. One of them being a "Photo" Raster layer. This has over 2000 Objects in ...
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102 views

published raster with custom coordinate system to geoserver (comes in as EPSG 404000), but it won't overlay with other layers?

I have an ecw file that is an aerial photo in a custom coordinate system. When I publish to geoserver, it specifies the EPSG as 404000. It seems like this isn't actually storing the coordinate system ...
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71 views

Publish postgis raster based on column value in geoserver

I have a postgis raster table with the following columns: rid, rast, year, plant I created a wms layer in geoserver pointing to the table and successfully serve out the raster when the table only has ...
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19 views

Combining unique raster value using QGIS?

I am writing an instruction to combine two unique raster values using an open GIS software packages like QGIS. Example of two unique raster values are raster1=landcover, raster2=admin units. The ...
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64 views

Why Does My Raster Catalog Crashes When I Try to Zoom?

I have a file geodatabase which includes a Raster Catalog. Up until today I've had no problems with my Raster Catalog. Now, when I pull in the Raster Catalog, I can see the footprint of my rasters. ...
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60 views

Pan sharpening of World View 2 image

I want to pan sharp world view 2 multispectral data its panchromatic band using HCS resolution merge tool in erdas imagine, can any one guide about which resampling technique(Nearest neighbour, ...
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157 views

Converting raster image of floor plan

I'm looking for ways to convert a raster image of a floor plan to workable data in a sense that the program should be able to locate the destination by referring to the co-ordinates of matching "ID/...
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184 views

stack raster using GDAL and numpy dstack

I am testing Savitzky-Golay filter with my MODIS dataset. Currently I am testing for 10 rasters (but later on will use my whole dataset) only just to test how should I create my script. So my initial ...
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130 views

How to make DEM raster in Google Sketchup?

I would like to make DEM in google sketchup, later add 3D buildings and finally convert this file to raster. Afterwards, I want to import this raster to GRASS GIS to make solar maps. It is possible to ...