Spatial Analyst is a extension within ArcGIS that provides a range of spatial modeling and analysis tools.

learn more… | top users | synonyms

3
votes
1answer
503 views

Calculating NDVI using Landsat ETM+ band values

I have sample points (shape file converted from a .xls file which contains XY coordinates,nnx,nny and canopy density) and a landsat etm+ image. First I applied 'SpatialAnalyst Tools>Extraction ...
0
votes
1answer
342 views

Error while creating a slope [duplicate]

I have a elevation raster (1 arc second) downloaded from USGS site. Before adding it to ArcMap I changed the display units to meters.The projection system for this raster is GCS_1983. When I use the ...
1
vote
1answer
622 views

Why does CON statement give ERROR 010240: Could not save raster dataset to (value) with output format GRID?

I am receiving the following error when trying to run the following code: import arcpy from arcpy import env from arcpy.sa import * arcpy.CheckOutExtension = "Spatial" env.workspace = ...
1
vote
0answers
18 views

Heat Map with species distribution [on hold]

what I am trying to do is to generate a heat map depicting the spatial distribution of certain species found in a lake, in association with their sex. For example, species_a+male or species_b+female ...
-1
votes
0answers
52 views

Geographical/Spatial analysis

I've got a vast number of layers (10) indicating a geographical phenomena from different dates. In ideal world, the phenomena should be in the exact same spot in all the different layers, or at least ...
0
votes
2answers
94 views

Multiprocessing with arcpy and Solar Analyst (spatial analyst)

I need help getting multiprocessing to work with the spatial analyst tool - Solar Analyst. I have tested the multiprocessing bit and it works fine. This sample is passing it a file containing 2 lines ...
0
votes
0answers
20 views

Spline tool using arcpy

Trying to use an arcpy script to operate the spline interpolation tool in spatial analyst on point data that represents soil sample points. When background processing is enabled I get an error of ...
1
vote
0answers
11 views

How to classify land cover with MMU 25hac

By using the 30 meter resolution of landsat TM & ETM+ data, I want to create the land use/ land cover map. I have read in several studies to first decide about the minimum mapping unit (MMU) that ...
1
vote
1answer
27 views

Arcpy - handling intermediate raster files

I have 8,760 (24*365) GRID rasters in a directory. I'd like to use use FocalStatistics analysis to reassign cells to the maximum of a 5x5 window/kernel and extract the resultant values at points ...
1
vote
0answers
14 views

Clarification on a previous Utilization Distribution Overlap Index (UDOI) answer

I'm really struggling to calculate the Utilization Distribution Overlap Index (UDOI) and could really use some clarification on a previous answer. There is a comprehensive guide to what i am trying ...
0
votes
1answer
37 views

Kernel Density with population

i want to do a kernel density with my points. As you can see on the picture, the black point reprensent all the buildings of my city and the green point all the locations of my customer. I would ...
3
votes
1answer
1k views

Why does Raster Calculator (RasterCalculator_sa) give ERROR 000539 in ArcPy?

I am getting a not executed error for a raster calculator. Here is part of the output: File "C:\projectTemp\FloodAnalysis\floodxsectionanalysis.py", line 107, in makeSeemless ...
1
vote
0answers
454 views

Raster calculator error 000539 - cannot create weak reference to 'classobj' object

I was - like many times before - trying to clip a raster with the raster calculator (raster * 1 with shapefiles as mask). Now - the following error keeps popping up: ERROR 000539: Error running ...
1
vote
1answer
707 views

ArcMap 10.1 - Tabulate Area tool “doubling up” for Overlapping Buffer Zones

This question is related to a previous question I asked: Raster Version of Spatial Join (one to many) I used the Tabulate Area tool to crosstabulate values between an overlapping "buffrast" raster ...
1
vote
0answers
30 views

How legitimate is smoothing raster data that has been converted from polygons?

I am interested in applying this methodology to census block data after conversion from a raster: http://rutgerscps.weebly.com/uploads/2/7/3/7/27370595/censusdatasmoothing_brief.pdf Basically, the ...
3
votes
1answer
55 views

Calculate change in canopy height over 10 years?

I want to know how many "tall" trees (greater than 30 m) fell down between 2005 and 2015. I have LIDAR imagery from 2005 and 2015 from an area where many tall trees are known to have fallen due to ...
1
vote
2answers
402 views

Using ArcGIS API interpolation functions (idw, kriging, splines) in my own dataset?

Does ArcGIS API provide interpolation functions, like if I want to interpolate from my own set of values? I know that ArcGIS provides functions for interpolation like IDW, Spline and Kriging etc, ...
1
vote
0answers
136 views

Error when labelling kriging result (contour) - the input layer is not valid

I've finished kriging, creating a contour-map, representing groundwater-height in my area. By a reason I don't know, it isn't possible to label my results. Neither can I export my data to vectors: ...
1
vote
1answer
328 views

How to create backlink raster for Cost Distance tool?

I have two polygon shapefiles and one cost surface. I need to estimate accessibility to these two sets of destinations. The part that I don't understand is whether I have to use an output backlink ...
2
votes
2answers
821 views

calculating zonal statistics of raster data in multiple overlapping zones and combining them into one table

The aim here is to calculate the max, min, mean, range, sum, count and std of raster data contained in areas delimited by polygons (much like what the Zonal Statistics as a Table tool from Spatial ...
1
vote
0answers
56 views

Is there PostGIS equivalent to arcpy.sa.Slice() function?

I have an existing system built on an 8.3 PostgreSQL database which uses a ArcGIS - Spatial Analyst for a couple of raster operations. The system is moving to PostgreSQL 9.2 and I'm evaluating if the ...
3
votes
0answers
22 views

Arcmap Combine tool output missing one field [closed]

I have sets of two rasters in Arcmap with identical extents and resolutions, but different values. I previously have used Combine in the Local toolset of Spatial Analyst to create a new raster with ...
0
votes
0answers
56 views

Understanding Spatial Join

How do I join .shp files so one layer will contain the amount of overlapped Area from another layer (per HUC as illustrated below)? I'm trying to determine how much Area [POLY_AREA] overlaps the HUC ...
0
votes
1answer
161 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
132 views

Weighted Overlay - passing parameter as text error?

For some reason when hardcoding the save path for the wieghted raster just before runtime it works perfectly. Like such... arcpy.env.cellSize = "90" arcpy.env.workspace = r'G:\Xcel\Route ...
1
vote
1answer
46 views

Kriging with expectation of 0, beyond the data supports

I am trying to Krige in ArcGIS from point samples of a chemical concentration. Towards the center, most of the points are larger, and on the periphery, all of the points are 0. The generated raster ...
3
votes
0answers
51 views

Problem with Flow Direction in DEM

I have the following problem with Flow Direction Tool in my DEM and with such wrong calculated flow direction in the centre of DEM I am unable to delineate any watershed. What can I do?
0
votes
1answer
44 views

Error: KrigingModelOrdinary not defined in python

Here is the code: rasterKrig = "run{}_Krig_{}".format(counter, field) outKrig = arcpy.sa.Kriging(Stations2010o3Data__2_, field, KrigingModelOrdinary, {2}) outKrig.save(rasterKrig) arcpy.env.extent = ...
1
vote
0answers
71 views

Estimating parameters of a semivariogram?

I have got a shapefile of rain gauges with a field giving the precipitation amount in a particular day. I need to interpolate the precipitation values to obtain a precipitation map for a particular ...
1
vote
1answer
56 views

Interpolate value at a specific point using kriging

Is it possible to interpolate the specific value at a point using the Kriging tool in the spatial analyst toolbox? If not, then, how can this be done in Arcgis? To my knowledge, Arcgis only produces ...
1
vote
1answer
43 views

Selecting different field in attribute table for kriging in ArcGIS for Desktop?

I have created a shapefile with several columns of data in the attribute table but I can not select any of the columns for a kriging except the 4 required to display (lable, northing, easting, ...
0
votes
2answers
20 views

Spatial Join Layer Derived from Zonal Raster on Original Polygon

I'm trying to do a 1:1 spatial join between polygons created from the zonal max of a slope raster on the original zonal features. The problem is that the jagged edges cause the target features to ...
3
votes
1answer
322 views

Can ArcGIS handle missing values to create a contour map?

I am trying to create a contour map for a waterbody. It turns out that in several locations there is no data. I just don't want to use the missing values as zero in ArcGIS because it would create ...
3
votes
2answers
123 views

Cost Distance Analyst In QGIS?

Are there any tools, plugins or methods in QGIS which allows for an analysis of the best path between two points using least cost path method? As shown below ArcGIS has several distance tools.
1
vote
0answers
17 views

Risk Maps - Spatial Analysis

I have created a basic mining subsidence likelihood map which contains the variables of depth and distance from lineament using the weighted overlay tool. From these results I would like to create a ...
3
votes
1answer
130 views

Creating constant slope DEM using ArcGIS Desktop?

I wanted to create a DEM of constant slope say 1/3000. How can I proceed in ArcGIS Desktop 9.3? The area may be 1000m x 1000m or any other as per convenience.
1
vote
0answers
37 views

How do I make a constant slope elevation model in arcMap? [duplicate]

I am currently working with ArcMap to develop an elevation model of a quarry showing how the terrain at the quarry site would look post-closure. One of the requirements is that the slopes placed along ...
0
votes
0answers
27 views

Getting all Google Earth Search Results into a KML for QGIS

This question has been asked by others before but there doesn't seem to have been a response, so maybe someone can help me here. I am using Google Earth to search for business premises in a UK city ...
0
votes
1answer
30 views

Calculate cells from which the feature would be visible above the skyline (horizon)

I'm trying to work out whether there is a way to do something similar to a ZTV/Visibility analysis but only include the cells from which the point (with 50m OFFSETA/height) would be visible above the ...
2
votes
2answers
42 views

How does the projection of a dataset affect the results of spatial analysis?

I am planning on conducting a multi-criteria-analysis with a number of different source datasets. A number of the datasets are found in different coordinate systems and projections. Do I need to ...
4
votes
1answer
96 views

Reclassification of raster

Is there a better way to do this? I'm trying to create a script that will change classifications of a raster to: 0 for: 0,7-9,15-20,40,62-63,73,78-87,89-130,132-151,153-175,177-203,215,228,251-253 ...
0
votes
0answers
34 views

Zonal Statistics As A Table - Missing Features in Results

I have a point shapefile that includes parcel centroid features across a county in Pennsylvania. I am trying to get a sense of the percentage of forest land within half-mile and mile buffers around ...
0
votes
1answer
36 views

Euclidean Distance between two lines

I have two lines in ArcMap 10.2.2 and was wondering if it is possible to create a raster showing the Euclidean Distance between them. Like to map each cell on one line to its nearest cell on the other ...
2
votes
0answers
59 views

How to use the multiprocessing module on python to execute a spatial join?

I have several shapefiles of the entire Amazon rainforest each with millions of polygons (they are fairly detailed and take some time to draw on ArcMap). I need each of these shapefiles to be ...
0
votes
2answers
36 views

Distance to, travel only on one surface

Looking to create a distance to wetland raster. However this travel distance must be through the water only. I have tried setting land to a high cost (e.g. 99) however doing so I have to set each ...
0
votes
0answers
68 views

Spatial analysis using QGIS or ArcGIS for Desktop?

I am working on the spatial distribution of commercial parking public spaces. I made a database (NUMBER PARKING PLACES, NUMBER OF PARKING MONTHLY), business subjects with adresses with activity. I did ...
1
vote
2answers
43 views

Low point density analysis

I'm working on a project for a conservation plan. Part of the plan requires that areas added for conservation have less than one structure per five acres (these are pretty large, mostly undeveloped ...
1
vote
0answers
20 views

Weighted Overlay Decimal Values for Evaluation Scale

I would like to do a weighted overlay of different raster datasets. I would like my evaluation scale to be from 1 to 10 with 0.1 as the incremental value. This way for example a criteria could have ...
3
votes
2answers
160 views

Calculating rate of spread of tree species

I'm fairly new to GIS and using ArcGIS for a palaeoecology project at university. I have created a map with isolines (all in the same layer using the contour tool) which represent time of arrival of a ...
0
votes
2answers
100 views

territory analysis

I want to determine the territories in which customers to a bank has the shortest path. It can be done with desktop software packages or programming if it is needed. Does anybody has idea on how to ...