5
votes
1answer
53 views

How can I match the cells of two rasters?

I have many raster files each one containing information that is different from the others (e.g. one contains information on rain, the other on altitude, and another on land use). The cells in each ...
0
votes
0answers
33 views

Creating spatial Reference to ASCII file

I have produced ASCII files in MaxEnt. These files are able to be loaded into Arcmap10.1 and display as an image, but i cannot interpret them or create them into a polygon for further analysis. I have ...
0
votes
0answers
18 views

Update Raster extent

How do you update raster's extent after you export the raster ? I forgot to enable the Date Frame rather than it's original Dataset ? Thanks.
2
votes
1answer
33 views

Subset multiband tiff file using Python in ArcGIS for Desktop?

I have a multiband (1140) raster file in tiff format that I want to subset. Each band represents a prediction of monthly rainfall (12 bands for each year) over a 95 year period (12*95=1140). I need to ...
0
votes
0answers
27 views

Setting raster resolution in meters when working in a Geographic Coordinate System

I work in WGS 84 (Geographic Coordinate System) in ArcGIS 10.1. I need to create a raster specifying its cell size in meters, and output it in WGS84. Is it a good solution (towards a less shape/area ...
1
vote
0answers
26 views

Making grayscale map from multiple band satellite image in ArcGIS for Desktop?

I have satellite multiple band map, I needs to make grayscale map,what should i do? what is the steps? which band and format of input are to be used in this? How to make attribute table of this? In ...
1
vote
1answer
35 views

Making color map in ArcGIS for Desktop?

I have bands 2, 3, 4, and 5 map. How can I use these to make a color map in ArcGIS 10.1 for Desktop? Can you give me steps? Also I want to make attribute table of colormap. How this can be ...
0
votes
1answer
36 views

Combining raster images? [closed]

I've decided to work on GIS implementation in transportation. I've these small tiles of images, with world files. I want to combine them to create a base map. I don't know coding/programming, so ...
4
votes
1answer
109 views

Why covariance values are different in R and ArcGIS?

I've calculated covariance between 7 rasters using R and ArcGIS. It gives me different results. Each times covariance values from R are approximately 1.874 times higher than ArcGIS values. R - ...
1
vote
1answer
37 views

How to calculate area of respective pixel?

I wants to create NDVI Map, In which it shows an area of respected pixel value lies in map.I have NDVI value within -0.6 to 0.7. Suppose,I wants to calculate area of 0.5 NDVI value with scale of ...
1
vote
1answer
31 views

How to calculate percentage area cover using Focal Statistics

I am trying to produce raster outputs in ArcGIS for later use in MaxEnt to model species distributions, and want to produce variables with statistics on the percentage cover of different habitat ...
2
votes
2answers
44 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. ...
1
vote
1answer
45 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 ...
3
votes
2answers
187 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
2answers
54 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?
2
votes
1answer
31 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 ...
1
vote
1answer
76 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
1answer
36 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 ...
4
votes
1answer
96 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

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
43 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 ...
3
votes
3answers
250 views

Las to bare-earth DEM: average points spacing and cell size

I am using ArcGIS 10.1 to generate a DEM (bare earth) from LAS dataset. To accomplish this, I use 'Las Dataset to Raster' tool as described in Esri website. I have read here and there in the web that ...
0
votes
1answer
53 views

How do I replace cell values of a raster using values of another raster with differing extent?

I have two rasters (raster1 and raster2). The raster1 extent is smaller than raster2. I want to replace the value of raster2 pixels using raster1 pixels. How can I replace the values?
1
vote
1answer
72 views

Need to calculate values for a cell based on surrounding landscape

I have a raster file with the urban development of a county mapped out (values: 1=urban 0=not urban). I also have a raster file with several blocks of forested land, each block of land has its own ...
2
votes
1answer
42 views

Identifying X-Y coordinates from a raster

I need to find the high and low values of multiple raster datasets individually. Then determine the x,y location of these values. I am using ArcGIS 10.1, have built the mosaic datasets I need, and ...
1
vote
1answer
80 views

How to export a Raster attribute table into a .txt using Model Builder

I'm using ArcGIS 10.1 I need to export a Raster attribute table into a .txt (or any other format Excel can import), using Model Builder. Is it possible?
1
vote
1answer
275 views

ArcGIS 10.1 Remove (or SetNull) areas of overlapping rasters

I have one raster layer that is a site suitability layer for a county. Then I have two feature classes (one for roads and one for hydrology) that I need to remove or just set to Null from the site ...
2
votes
2answers
285 views

Digital Number (DN) on satellite imagery? [closed]

How would I know if any of the satellite imagery (Landsat, ASTER, Quickbird and so on) have DN or Digital Numbers such as integer or uninteger on its pixel. I download from the USGS EarthExplorer and ...
3
votes
0answers
61 views

How to create cost surface for least cost water transport analysis?

I am working on a project to derive least cost pathways between sites by dug out canoe travel. Has anyone worked on a similar project or found a function like the Tobler hiking function that can be ...
1
vote
1answer
55 views

Exporting .tif from referenced mosaic dataset does not use functions in raster dataset

Very frustrating little issue in ArcGIS 10.1 -- I have a referenced mosaic dataset of terrain data that has a series of functions inserted (slope and several iterations of a statistics function to ...
2
votes
1answer
124 views

ArcGIS model builder: How to reclassify 16,000+ rasters and do weighted sums on these rasters per year?

I've been trying to build a model in model builder (ArcGIS 10.1) which can do the following task: I have a folder full of ca. 16,000 raster files (.asc) representing mean temperatures for each day ...
1
vote
0answers
71 views

How to create a circle vector layer with 12 sectors with Python and to save average value of underlying raster in each sector?

Hi I am writing a code with Python 2.7 using Arcpy 10.1 and I guess I am doing stuck with a silly problem that lies under my eyes. I have created a grid of points (with "Create fishnet" function) over ...
0
votes
0answers
65 views

How to extract raster using corresponding polygon using ArcPy?

I have to perform a simple raster extraction, but I can't find the way to do it. In a polygon layer, I have watersheds with their ID's. And in a folder, I have rasters, each one corresponding to a ...
1
vote
1answer
82 views

How to combine Boolean and Fuzzy logic?

So I have a set of 5 Fuzzy Memberships and a polygon feature class, to which I already added a yes/no field. For the final map, I need to combine/overlay all Fuzzy Memberships and the rasterized ...
2
votes
4answers
575 views

Combine overlapping rasters with priority to values of specific rasters?

I have 5 rasters that cover a large area. I want to combine all 5 into 1 raster. Each raster has data for portions of the total area that none of the other rasters cover. Raster C overlaps A,B and D. ...
0
votes
0answers
36 views

problem saving GRID to .img keeping original names (export by attributes)

I am really new in Python programming. I try to make a loop for Extract by Attributes tool in ArcGIS 10.1. I have a huge dataset of raster (760pc) and I want to extract a specific value. This part of ...
1
vote
2answers
106 views

Copy Jp2000 from Mosiac Dataset turns white

I am trying to copy a raster to jp2000 from another File Geodatabase that I created as a Mosaic Dataset. It came out as a whiteout in the middle. I don't know what it cause this. See screenshot : ...
1
vote
1answer
103 views

Calculation amount or number of certain pixel-values in a raster

It seems pretty simple but until now I could not find a proper solution: In a given raster i want to know the number or ratio of e.g. red pixels. Edit: to be more precise: I have a number a arial ...
1
vote
1answer
247 views

Extracting data from a raster to a polyline based on start and end points?

I have a polyline shapefile with the attributes seen above. startx and starty represent the coordinates of the beginning of each segment of a polyline. endx and endy represent the coordinates of ...
0
votes
1answer
124 views

Export raster file geodatabase to jp2 or jpeg?

Can I export or copy a raster from a file Geodatabase and create a output to jpeg or jp2000 formate? I was reading two different helpline on ArcGIS 10.1 and wasn't sure if I was supposed to export ...
1
vote
0answers
147 views

ArcGIS Mosaic to New Raster() tool seems to interpolate data gaps on one computer/version but not another?

i have a group of raster files in .tif format that I want to mosaic together into one .tif. I've noticed that I get data gaps along the seams when I do Mosaic to New Raster() on my home computer ...
1
vote
1answer
199 views

Multiply a raster list with a field value list in a FOR loop in ArcPy

I'm trying to create a simple map algebra calculation not managed by ModelBuilder, but writing it in Python is trickier than I thought. I have a list of raster in a GDB and I must multiply them by ...
0
votes
2answers
357 views

Can you change the processing extent in environment settings using python to a shapefile?

I have managed to do this manually at Geoprocessing>Environments>Processing Extent and setting the shapefile in the drop down bar. I was wonder if this could be automated with a python script? My ...
6
votes
2answers
194 views

How to force 1-bit raster output in ArcGIS 10.1 for Desktop?

Any ideas on how to force a 1bit raster output in ArcGIS 10.1? By default, ArcGIS is being very dense about recognizing pixel depth. I have a binary raster [0,1] and a mask raster [1] and they are ...
1
vote
0answers
99 views

Fill tool creating large output files from sections of a Raster

(This raster information for one of the clipped rasters) I have a raster image representing a landscape that is about 1.3Gb. I clipped the raster into 31 sections which vary in size from 10Mb to ...
1
vote
1answer
141 views

ListRasters not recognizing raster files in python

I have 2 rasters in my workspace, one in TIFF Format and the other in GRID format: "C:\ExampleFolder" When I use the python script: import arcpy >>> ...
2
votes
3answers
911 views

Clip a raster using a shapefile into multiple rasters?

I have a raster file representing a large area and a shapefile of 30 polygons representing watersheds. I would like to clip the raster with the shapefile to create 30 rasters representing each ...
0
votes
1answer
79 views

Topo To Raster executing but not creating the raster

I am using Topo to Raster by File (ArcGIS version 10.1) via arcpy on a large stream and point dataset. Arcpy runs fine and executes without issuing any error message, however it does not create the ...
0
votes
1answer
62 views

Attribute names being truncated during extraction

I have 30-40 raster layers and each raster has approximately 40 columns. The attribute/column names are very long, and the beginning of each column name is the same. During the extraction process, ...
1
vote
0answers
219 views

TIN to Raster Tool, output elevations are 3.40282e+038 and -3.40282e+038, tried calculate statistics didn't work

I have an input TIN file that I created using Create TIN. The elevations are all correct. When I convert the TIN to Raster using the tool, my output elevations are 3.40282e+038 and -3.40282e+038 ...