2
votes
3answers
34 views

How to increase raster extent by filling extent with no data using ArcGIS Desktop without Spatial Analyst?

I am using feature to raster to rasterize water polygons. It only makes a raster the extent of the features in the polygons, whereas I would like it to be the extent of another existing .tif image. ...
4
votes
2answers
66 views

How to access raster NoData value?

I am trying to programmatically access the NoData value in a raster dataset as shown in the screenshot. Two tools that come to mind to describe raster properties do not seem to be able to describe ...
2
votes
2answers
32 views

How to add updated tiles to ArcGIS mosaic

I have several hundred aerial imagery raster tiles (in ecw format) that I have loaded into a mosaic dataset. I would now like to 'replace' or 'overlay' an older aerial imagery layer with this dataset. ...
2
votes
1answer
42 views

Smoothing raster map

I have a raster map of US Midwest which is very sparse, i.e. the pixels of interest are few enough to be almost invisble when viewed at a scale where all states of US Midwest are visible. I would like ...
2
votes
1answer
25 views

Get min-max values of a raster and populate two parameters with the values in tool validation script

I am customizing the script tool behaviour of a custom script and would like to get the min-max values from a raster self.params[0] and populate the next two parameters, self.params[1] and ...
1
vote
1answer
30 views

raster files are not exact in extent after clipping

My two layers (chlorophyll-a and Bathmetry) are not exact after I clip my rasters. My bathymetry data (1) is reporting up to 10 decimal places where as chlorophyll-a (2) is only 3 decimal places and ...
2
votes
1answer
33 views

Convert polyline to presence absence raster in arcpy

I have a polyline that I am converting to a raster in arcpy. This is occuring within a loop and at each iteration I change the processing environment to a different area of interest. In this case it ...
3
votes
0answers
26 views

Raster loaded in ArcMap 10.2.1 not showing decimal places for value

I have an IMG format raster that I am loading into ArcMap 10.2.1. The pixel type and depth, as reported by the Source tab in Layer Properties is 32-bit floating point. The values, as reported in the ...
2
votes
2answers
57 views

Group adjacent polygons with similar (but not same) attributes

In ArcMap 10, I have a few dozen tiffs with cells that represent habitat area that has been burned. Each burned cell has a Julian date of the fire associated with it. I want to end up with polygons ...
3
votes
2answers
113 views

How to generate wind direction raster using its U and V components in arcgis?

I have two raster layers representing the U and V components of a vector wind. I could generate the magnitude raster by applying (u*u+v*v) in Map Algebra in ArcGIS. Now I need to generate the ...
1
vote
1answer
33 views

AttributeError: 'unicode' object has no attribute 'save'

I'm trying to multiply my raster to 100 from my ListRasters. I've adapted the code (especially the for loop portion) also from this site. Now, I'm encountering an error at the last line, when saving ...
1
vote
0answers
66 views

Correlation between point feature (disease) and elevation

I have a problem! How can I calculate the correlation between point feature and Dem raster? Hypothesis: disease prevalence in high altitude is more than low altitude. I must do this in ArcGIS 10 and ...
2
votes
2answers
30 views

Setting background RGB value to invisible for multiple rasters in ArcGIS Desktop?

I'm using ArcGIS Desktop 10.0. I need to set my background rgb value of 255,255,255 to transparent. In the layer-Properties Windows > Symbology I can do it for one layer, but can I batch set this, or ...
1
vote
2answers
45 views

Is there raster equivalent to vector Intersect?

The intersect tool that is used on vector data cannot be used on raster data. What tool can I use for my two rasters that does the same as the Overlay > Intersect tool?
1
vote
1answer
34 views

Con() does not recognize raster values

I have a problem when using the con() argument. What I want to do is to remap all raster of a raster file ("Red_SL") cells with values larger than 40 to the new value 5. All other values should be ...
1
vote
0answers
20 views

Problem with adding mosaic layer via arcpy

I have a mosaic layer that I want to add to my map in ArcMap. When I add this layer manually (i.e the "Add Data" button), a raster image, a boundary, and a footprint are added to my table of contents. ...
2
votes
3answers
65 views

Zonal Statistics as Table Tool

I have a slope dataset. I have a polygon shapefile with territory within the extent of the slope map. I have to calculate the real surface area of this shapefile using the zonal statistics as table ...
1
vote
2answers
28 views

polygon to raster - not all polygons rasterized

I have a building footprint shapefile (polygons) that I want to convert to a raster. I use the Polygon to Raster tool, and specify a cell size by importing from another raster (which is 24m x 30m). ...
2
votes
1answer
24 views

raster overlap count

Would it be possible to simply detect and count overlaps between raster files, i.e. not polygons against rasters, using arcpy? By default I don't have the spatial analyst extension for ArcMap 10.1 but ...
0
votes
0answers
34 views

analysis of srtm data for gaps

I need to analyse the SRTM DATA (1025 X 1025) of a particular terrain which has gaps or voids. Could anybody suggest a solution to find the percentage of gaps or voids in the SRTM data? I would like ...
2
votes
2answers
41 views

What is the source of horizontal and vertical striping in USGS DEMs?

When processing 30m and 10m DEM data downloaded through the National Map Viewer from the National Elevation Dataset, we noticed horizontal and vertical striping not only in the produced results, but ...
0
votes
1answer
31 views

How I can sum 360 raster files in a folder with the Arcgis raster calculator?

In a folder I have 360 precipitation raster files and I want to sum them all to the raster calculator
0
votes
1answer
49 views

How do I overcome this problem of converting a raster layer to polygon form?

I am trying to convert a raster layer of U.S. climatic regions into polygon format using ArcMap 9.3 under Windows XP. The original data are to be found at the following address: Koppen Climate ...
1
vote
1answer
55 views

Spectral profile (z-profile) viewer for ArcGIS

I have multilayer raster with 6 bands. Is there a way to select one specific pixel and to display the z profile (the values of each band) for this pixel as a chart or table? I am looking for a tool ...
1
vote
1answer
51 views

rasters as independent variables in logistic regression: must they have the same values classification?

I am planning to build a predictive model for land productivity using arcGIS 10.1. and logistic regression. In my model, the Independent Variables would be, among others, distance from rivers, ...
0
votes
0answers
24 views

Overlaying Line (Vector) Layer on Raster Zones?

I will make my best attempt to clearly explain my problem. I am using ArcGIS 10 I have a raster layer with 3 values that make up zones. For the purpose of this example, lets say these zones are ...
2
votes
4answers
144 views

raster area calculation using python script

Hi I am a beginner to python programming in GIS and am trying to calculate the area of a raster. When I ran the program, I got error message below. I am also providing my code. Any help would be ...
1
vote
1answer
31 views

Why is the raster information No Data value set to -1.#IND?

I have a couple rasters that have been atmospherically corrected using the "landsat.toar" tool in Grass. When these rasters are output and I open up their properties in ArcCatalog, the NoData Value ...
1
vote
2answers
34 views

Adding Rasters as Columns in Shapefile using ArcGIS for Desktop? [closed]

I am currently working on a research project in a lab, and I am fairly familiar with ArcGIS (I'm only in high school and have done some previous work using ArcGIS). I was asked to add 3 columns onto a ...
0
votes
1answer
32 views

Symbolizing Raster using single Unique Value?

I'm dealing with a raster in GRID format. Currently it is symbolized in Unique Values and contains 5 classes. I'm trying to consolidate these to one class. Is there a way to do this and keep a single ...
3
votes
1answer
75 views

Cropping or removing borders (not NoData) from multiple scanned and georeferenced maps (ArcMap or QGIS)

I have several hundred scanned maps in TIFF format, each correctly georeferenced and forming a large grid of images. The problem is that the border for each map is present - a white band, with a black ...
4
votes
1answer
80 views

What's the correct way to reproject a population raster?

I'm working with a population raster that is in the WGS84 coordinate system, and I want to get it into a projected coordinate system (Albers Equal Area), using ArcGIS 10.1. According to the metadata, ...
0
votes
1answer
28 views

Raster data with no values (ArcGIS)

Used a DEM raster and then used the extract-by-mask feature to shrink it to the shp file I'm working with. However, when I try to get unique values, it gives me the following error message: "The ...
0
votes
1answer
52 views

Arcpy Subtracting rasters error - TypeError: 'unicode' object is not callable

I have a script which subtracts 2 versions of the same raster from each other (one newer than the other) and then extracts the additions & deletions that have happened. I created a simple test ...
1
vote
2answers
78 views

In ArcMap 10.2, exporting raster as .tif with “use renderer” and “force RGB” still produces inaccurate colors

I have a DEM and my aim is to change its color ramp using ArcMap, then export this colored raster as a geotiff (8 bit). I checked "use renderer" and "force RGB" options but the results are not good ...
3
votes
1answer
244 views

How to change value of an individual pixel using arcpy?

I want to change the value of an individual pixel in a raster using arcpy. The code I wrote for changing the value is below, but it changes all of pixels in my raster. How can I set an individual ...
0
votes
1answer
22 views

My raster values are always changed to zero

I'm uploading a series of XYZ data points onto GIS and the co-ordinates are coming up fine, but some of the Z values are changed to zero - and in some cases, all! I've interpolated the majority of the ...
2
votes
2answers
58 views

Display two-dimensional color gradient for two different quantities

I have two overlapping raster layers. One contains quantity A from 0 to 100, and the other contains quantity B from 0 to 100. I'd like to create a map displaying both sets of data at once based on a ...
0
votes
0answers
45 views

Bi-Weekly NDVI data into monthly Datasets

I have NDVI data in both Ascii Grid format (0.250 degrees resolution) and raster format twice a month like: ndvi1981_07a ndvi1981_07b I would like to combine these bi-weekly values (average) into ...
0
votes
1answer
41 views

How can I use polygon grid to export raster [duplicate]

I have a polygon grid which consists of 100 square polygons. For each square I need to export the raster overlay. I have ArcGIS 10.0, FME 2014, Saga-GIS. Is there a suitable tool for this or do I need ...
3
votes
1answer
67 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 ...
0
votes
1answer
49 views

GeoTIFF created using ArcGIS for Desktop not displaying in Google Earth or Photoshop?

I originally had an IMAGINE Land Cover raster file that I opened in ArcMap. I used the Extract Feature from Raster to extract only the Developed class and saved it (still IMAGINE). Then I used the ...
1
vote
2answers
139 views

Merging multiple rasters with SAME spatial extent

So I began with lidar elevation data 1m resolution, and I performed a terrain analysis to extract specific ranges of elevation from the raster (1st picture is 0-1m elevation, 2nd picture is 1-2m ...
0
votes
1answer
25 views

Calculating GRID Statstics

I have a GRID raster dataset with no calculated statistics. I have tried building pyramids and calculating statistics with no luck. What am I missing? EDIT: For those who don't understand: 1. ...
0
votes
1answer
33 views

Difference in vector / raster area measurements

I'm comparing raster and vector distance zones. So I created a line, calculated the Euclidean distance, and reclassified the raster to two zones: from 0-10m and 10-20m. To compare it with vector ...
0
votes
1answer
52 views

problem in scale of projected raster

I have a shapefile (my basin limit) and one raster file that I projected it to the shapefile coordinate system and set its cell size to 1000m(area=1Km2). my basin area is 5400 Km2 and it should ...
1
vote
2answers
64 views

Sum values within one raster (25m) using another raster (1km) ArcGIS Desktop 10.2

I am summarizing some population data using a 1km raster overlay. I converted population data, polygon layer, into a 25-meter raster that contains the value for population/m^2. That value is then ...
0
votes
1answer
42 views

Extracting info on polygons from underlaying raster layers

In ArcGIS 10.1, I have two layers: 1) raster of Topographic Wetness Index 2) vector layer of polygons representing soil types I am wondering how to accomplish what I am after, that is to get ...
1
vote
1answer
49 views

Export a large raster to a comma or tab delimited text file in ArcGIS 10.2 for Desktop

I have a large raster with multiple attributes in 200-meter cells, and I would like to export this to a tab or comma delimited file which contains the X,Y coordinates and all of the attributes. If ...
1
vote
1answer
31 views

How to change the symbology on many image files within a group?

I have a group of raster images from lidar data (so a DEM). When loaded in, they all have different symbology - so their color scheme and color ramp are all different. I would like to create a group ...