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

learn more… | top users | synonyms

1
vote
0answers
39 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
71 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 ...
0
votes
2answers
140 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 ...
3
votes
0answers
26 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
73 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 ...
3
votes
0answers
84 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?
1
vote
0answers
64 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 ...
1
vote
0answers
26 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
2answers
230 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.
0
votes
2answers
24 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 ...
0
votes
0answers
47 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
2answers
60 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 ...
4
votes
1answer
160 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
63 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 ...
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
1answer
65 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
80 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
44 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 ...
1
vote
2answers
53 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
1answer
39 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 ...
2
votes
2answers
60 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 ...
0
votes
1answer
35 views

How to make sense of multi-band global radiation output raster from area solar radiation tool

So I'm running the area solar radiation tool using the time configuration and other parameters as seen here: By selecting the "Create outputs for each interval" checkbox, the global radiation ...
0
votes
0answers
63 views

How to find a least cost path through several points?

I want to do a least cost path analysis and the least cost path has to go through several different points instead of having just a start and end destination. Is this possible? I am using ArcGIS ...
0
votes
1answer
43 views

How to find out the length and friction costs of my least cost path?

I modeled different possibilities for transmission lines with the GIS tool "Cost Path". Now I would like to find out more information about my results. First of all: Where can I see the length of my ...
0
votes
2answers
31 views

Aspect Patch Count

I am using ArcMap to create aspect maps. I want to find the how many different directions the land faces (total aspect patch count) with continuous patches greater than three. So for example I want ...
0
votes
0answers
103 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
1answer
72 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 ...
0
votes
0answers
43 views

Unusual results with Watershed geoprocessing tool

From the starting point of that I already have a flow direction raster and a pour points feature class, I get different results if I execute the geoprocessing tool Watershed using as input the raster ...
1
vote
2answers
102 views

Understanding flow accumulation

I used this youtube video: https://www.youtube.com/watch?v=FSblORbDyhc&list=PLWJ2X2wvq78QRGzl8Un5ADF0_4m5t99iD&index=11 to learn how to run flow accumulation and was successful. I realize it ...
0
votes
1answer
87 views

Obtaining ArcView 3.2 Spatial Analysis 1.1?

Is it still possible to obtain and use a copy of the Spatial Analyst 1.1 extension to ArcView 3.2 in order to finish a final project at a University?
1
vote
2answers
54 views

SplineWithBarrier (Spatial Analyst) - different results between model builder and external python script

I'm puzzled by different results I get from application of SplineWithBarrier (Spatial Analyst) using Modelbuilder and by external Python scripting: import arcpy points_shp = "pointShape.shp" ...
1
vote
0answers
105 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 ...
0
votes
0answers
55 views

How to randomly generate 3 X 3 pixel window/grid size in ArcMap?

I have a raster image in ArcMap and I want to assess the accuracy of my raster image with a reference image. So, I need to randomly generate a bunch of (i.e 50) 3 X 3 pixel window/grid size from my ...
1
vote
1answer
22 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. ...
0
votes
0answers
19 views

Is there a way to terminate the Particle Track tool based upon a specific change in direction angle (ArcGIS 10.2)?

I am currently using a Python for loop structure to process a CSV file of coordinate points through the Particle Track tool in Spatial Analyst. I understand from the tool instructions that tracking is ...
0
votes
0answers
129 views

Determining Flow Direction in ArcGIS for Desktop?

I have a problem with the Flow Direction tool ArcGIS 10.2.2. After running the tool on a digital elevation model in .tif format 16 bit unsigned integer. However the result is an image of 8 bit ...
1
vote
1answer
48 views

Is there any statistical measure/tool that compares two different sets of location configurations in R or ArcGIS/QGIS?

Here is what I'd intend to do; I have a given set of facility locations as shown below; And based on a predefined one optimization criterion, I obtained the following configuration (and there are ...
0
votes
1answer
87 views

ArcGIS Spatial Analyst in arcpy - FATAL ERROR (INFDEF) DIRECTORY FULL

I have been running into this error in several geoprocessing scripts I've written lately. When I call a spatial analyst function I return this error: FATAL ERROR (INFDEF) DIRECTORY FULL import ...
3
votes
2answers
74 views

Create map(s) to help determine site selection

I have the task of creating a map in which the objective would be to help determine a site for a conference. I have the following data: Addresses of possible conference attendees (I have already ...
2
votes
1answer
71 views

Automating estimation of invert elevations using ArcGIS for Desktop?

I’m working on a project where I need to estimate about 1400 pipe inverts using the adjoining pipes and manholes. The problem is a lot of the adjoining pipes are missing elevation data as well, so ...
1
vote
1answer
86 views

Wedge neighborhood on Focal Statistics calculation

I am using Focal Statistics in Spatial Analyst of ArcMap10.2, and use the wedge type of neighborhood for a radius of 10 km around each processing pixel. I want to calculate the maximum elevation for ...
1
vote
0answers
58 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 ...
0
votes
1answer
222 views

Finding correlation between point location and raster value

I have what i thought was a very simple problem but i think i may have overthought it.... I have a population density raster and a point feature layer showing the locations of X (about 70 points). ...
1
vote
0answers
45 views

Filtering for slope using kernel size in ArcGIS Desktop?

I have problem in smoothing the slope derived from digital elevation model. I want to do filter for the slope <5 degree in 7 X 7 kernel size, 5-20 degree in 5X5 kernel and >20 degree slope in 3X3 ...
2
votes
1answer
79 views

Count Number of Times 100 Feature Classes Overlap

This must have been asked before, but I can't find the exact answer and my attempts so far have not worked. Most of the overlap questions I see are for calculating the area of overlap for portions of ...
1
vote
1answer
64 views

How can I come up with the spatial variation of ndvi using arcgis 9.3.

I would like to come up with the spatial variation of NDVI of a certain area. I have the average NDVI from 1998 to 2014. I'm using Arcgis 9.3
0
votes
0answers
51 views

Create .lyr file from a raster and add to display

I'm working with rasters, there are 3 folder (input, query, result). In the input folder are the basic rasters. The user can choose between these rasters, the code can collect the rasters into the ...
0
votes
0answers
17 views

implement aspect in least cost path analysis to account for downhill and neutral ground movement [duplicate]

I am creating a least cost path model for large species that migrate over large distances across a rugged landscape (elk, deer, etc.) To calculate movement cost I am using a slope raster but I ...
-1
votes
1answer
86 views

Field calculator (using ATAN)

How do I input the arc tan in the field calculator given the values of the fields to get the desired answer, I compare the answer of the manually computed arc tan value and the Atan Spatial Analyst ...
1
vote
0answers
79 views

Calculate amount of rainfall per grid

I have precipitation measurement data of some points. I calculate the spatial distribution of rainfall using thiessen polygon method with ArcGIS. This shows amount of total rainfall on polygons. How ...