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

learn more… | top users | synonyms

1
vote
1answer
25 views

Number of events within each elevation class

I'm trying to model how elevation affects fire events for an AOI, I have run my cluster analysis for the fire events and right now I'm trying to calculate how many fire events fall within each ...
1
vote
0answers
30 views

Can I interpolate but follow the trend of another surface?

I have a point data set will a fairly low sample density and a raster that should loosely correlate with the values of the points. For example, this could be elevation and temperature readings. I want ...
-1
votes
1answer
46 views

raster calculator (spatial analyst) tool not working in arcpy [duplicate]

I am using arcpy and while running the script it is unable to find RasterCalculator() method? Even after imporiting arpy module >>> RasterCalculator("IDSI_2002.img + IDSI_2007.img","D:/...
3
votes
3answers
57 views

Checking where values are the same between 2 rasters

I am working in ArcGIS 10.3 and I am trying to discover where the output of two different models agree. two models were run for the risk of contamination with a carcinogenic toxin. The output of each ...
0
votes
1answer
56 views

Determining raster intersection using ArcGIS for Desktop?

Using Arc 10.2.2 with Spatial Analyst, I need to determine the spatial intersection of two rasters (both rasters are in the same coordinate system, and are aligned to the same snap raster). The two ...
2
votes
0answers
54 views

Arcpy.sa NoData issue with saving TIFF

Similar to the poster here, I am attempting to convert numerical NoData values to actual NoData cells. The solution in the linked question doesn't work for me, however, as when I use the save method ...
1
vote
2answers
142 views

“ERROR 010214: Unable to read STA of…” while running Arc Hydro Geoprocessing Tools

Today I tried running the Combined Terrain with Unknown Sink and Stream Locations Tool from the Arc Hydro Toolset (version 10.3.0.58, ArcMap 10.3). As input I used a DTM with values between -10 and 19 ...
1
vote
1answer
72 views

Average of raster elevation based on polygon boundaries

I am attempting to extract and calculate the average height of buildings using LiDAR converted to raster elevation data. I've created a DSM to cover the entire area and I am trying to extract just the ...
3
votes
1answer
96 views

Too many zones for Zonal Histogram?

I have 45 tif tiles each of 20-50MB and a single shp file with about 4000 polygons. I want to run zonal histogram in Arcmap 10 to get the number of pixels with each value for each polygon. If I ...
0
votes
1answer
212 views

Creating Heatmap from attribute value of point features in ArcGIS for Desktop?

I've run through tutorial from ArcGIS on how to create a heat map using Spatial Analysis. Based on the example, point features are scattered around the map and we need do the following to generate ...
0
votes
1answer
35 views

Writing only final raster with intermediate bands going to disk using ArcPy?

I have a raster with 4 bands. I would like to create a new raster (its individual bands called new_band) from this raster (its individual bands called old_band) in with : new_band1 = old_band1 * 2 ...
1
vote
0answers
44 views

How to create separate viewsheds for individual points?

I have a feature class with 3000 points. My goal is to have a viewshed, at each point, clipped to 50m and 500m buffers. I want to be able to look at the percent visible/not visible for each point. I ...
0
votes
1answer
72 views

Viewshed analysis on building

I'm trying to run a viewshed analysis of building. My original building layer was a vector which had a height attribute. I converted this to raster and added my elevation layer to my building raster ...
1
vote
1answer
61 views

Is there a difference between tools with same name in the ArcGIS 3D Analyst and Spatial Analyst toolboxes?

There are several of the same tools within the 3D Analyst and Spatial Analyst toolboxes (for example, Reclassify and Visibility). Is the same tool being accessed regardless of whether it is found ...
0
votes
0answers
54 views

applying Image regression in landsat image

I have two different date of Landsat image.I want to do change detection using image regression method.Is it possible to do image regression in Erdas Imagine or ARCGIS? How can I develop a model for ...
0
votes
1answer
112 views

Slope (Spatial Analyst) output shapefile having weird values

I'm trying to calculate the slope for a raster layer using ArcMap 10.2 and the Slope (Spatial Analyst) function. The raster I'm using is an NED 10m mosaic DEM, and the mosaic's datum is in WGS 1984. I ...
0
votes
0answers
74 views

Watershed delineation for multiple points in a single shapefile

I have a shapefile with 23 points along a 11 km river and I wish to create upstream watershed boundaries for each point without having to split the shapefile into 23 individual points. I have snapped ...
2
votes
1answer
101 views

Grouping points using grouping analysis to look at raster characteristics within overlapping buffers?

I want to extract averages from raster data that fall within buffer zones around a village point. The problem is that the villages are pretty close together in some places and I need to come up with ...
1
vote
1answer
100 views

Resample not changing the cell size

I am trying to use the Resample tool in Spatial Analyst to go from a 1kmx1km grid to a 500mx500m grid for increased resolution of my land use data. My cell size is 0.008, and I want a 0.004 cell size....
1
vote
1answer
89 views

ArcGIS method for declustering a spatial dataset?

I have previously asked this question but perhaps was using the wrong terminology. I would like to run some type of cell declustering on a spatial dataset. Is there a tool for doing this in Arc? ...
1
vote
0answers
53 views

Errors when using Spatial Analyst to Extract Values to Points?

I have a raster that I have classified into three slope positions and a points layer of bird nest locations. I'd like to add the layers together and use this to determine which of the three slope ...
1
vote
2answers
102 views

Alternative to nested Con statements in python

I have a nested con statement that I'd like to put into a script, as it's hard to follow in its current form. The raster it produces is incorrect, so it'd be easier to debug in a script. The ...
0
votes
0answers
18 views

Merging line features to produce bicycle friendly streets connectivity layer?

I was wanting to produce a connectivity of bicycle friendly streets layer. For my analysis, bicycle friendly streets are off-road cycle paths, local roads and on-road cycle paths. I have separate: off-...
2
votes
1answer
75 views

Check if night hours (TimeWithinDay; AreaSolarRadiation)

I am creating a script that uses AreaSolarRadiation. Currently arcpy gives a cryptic error during the night hours. arcgisscripting.ExecuteError: ERROR 999999: Error executing function. Failed to ...
1
vote
0answers
54 views

Distance Analysis from single point to multiple points on vector layers

Is it possible to do the following in QGIS: Create a text file that plots the distance from a single point (stored in one layer) and multiple points (stored in another layer). I have tried to use ...
1
vote
2answers
163 views

Selecting Specific Elevation Areas Contiguous to the Coastline for Coastal Flood Mapping

This is less a problem than an inquiry into a better way of doing something. I am curious how people might go about selecting, say, all areas less than or equal to 10 feet (from a DEM) that are ...
2
votes
1answer
286 views

Create largest circle (maximum radius) inside a polygon in ArcGIS for Desktop?

I am trying to create the largest possible circle inside a polygon including its perimeter and area size. I created via minimum boundary geometry the smallest possible circle outside a polygon (see ...
0
votes
1answer
58 views

Adding multiple rasters produces unexpected results. I have set the data extent to the same in all rasters

I am trying to add three rasters together. I'm trying to figure out where I am going wrong so I am going to list out what I am doing: I have Raster_1, Raster_2 and Raster_3. Raster_1 and Raster_2 ...
0
votes
0answers
12 views

Maximum Distance Nearest Neighbor and a Unknown Coordinate [duplicate]

Is there a way to solve this problem using ArcGIS? What coordinate within the blue polygon (2-dimensional) maximizes the distance between the unknown coordinate and the nearest neighbor (neighbor = ...
1
vote
0answers
70 views

Tabulate Area 2 Tool not returning correct area

I am having trouble with the output of the "Tabulate Area 2" tool in the following update: http://blogs.esri.com/esri/arcgis/2013/11/26/new-spatial-analyst-supplemental-tools-v1-3/ I have a layer of ...
0
votes
0answers
40 views

Interpolate Points with GAM-Model

I'm trying to interpolate some point-data to a raster-map. Until now i used kriging to interpolate the point-data to the surface. now i have to use a generalized additive model for that task. my ...
1
vote
0answers
288 views

How to Convert from Point to Continuous Raster in ArcGIS 10.1?

I have a vector point dataset that I would like to convert to raster. The point-to-raster conversion tool creates a raster grid with spaces between each grid cell. I want to create a 'continuous' ...
0
votes
0answers
27 views

Common methods of area comparison?

I have a set of raster area results, that represent a prediction for a specific loccation. I would like to measure accuracy of two methods, given the actual values, estimate-A method values and ...
3
votes
4answers
234 views

How can Identify highs on a DEM?

I have a DEM and I want to find each hill and create a polygon for its area, effectively the out closed contour that encloses the hill. I can do this visually but I'm about to work on a larger area so ...
1
vote
0answers
71 views

Why is the Spatial Analyst toolbar graph different to Graphs>Create Graph?

I'm using ArcGIS 10.3 and want to look at elevation vs frequency of each elevation for a DEM. There seems to be two ways to create this graph: Use the "Create histogram" tool on the Spatial Analyst ...
1
vote
1answer
92 views

How does majority algorithm works in ArcGIS

I'm trying to understand how does the majority resampling works in ArcGIS, they write that "The MAJORITY option, which performs a majority algorithm, determines the new value of the cell based on the ...
4
votes
1answer
119 views

Correlation between corn yield and planting speed using ArcGIS for Desktop or QGIS?

I have two maps that originally come from a harvester and a tractor as shapefiles: Corn Yield and Planting Speed. I would like to know what would be the best procedures to statistically answer the ...
0
votes
1answer
151 views

Debugging Flow Accumulation ERROR 999999 Error executing function The table was not found?

I have been trying run flow accumulation from the spatial analyst extension in Arc 10.3. I'm using a raster DEM from downloaded from the National Map. I used the fill and flow direction functions ...
1
vote
0answers
38 views

How to best populate points within a polygon with a set of rules

I've got a polygon (a Circle) with a certain size. I want to put points inside it, as much as I can, but with a set of rules : Points can't be near each other, up to 500 meters. Points can't be near ...
0
votes
0answers
70 views

How can I replicate focalmean with focal statistics

Hi I am trying to get rid of some small gaps of no data in my rasters. I would previosly have used focalmean but it is no longer available. I've tried what I expected to work but I'm getting errors. ...
0
votes
0answers
36 views

Derive individual land cover classes from .jpg map

I have a .jpg image which is land cover classification image with 9 classes. I want to extract raster image (.img file) which contains the same classes as .jpg image (9 classes too). Is there any tool ...
0
votes
1answer
73 views

Creating an intersecting linestring layer from two polygon layers using some tolerance

I have two postgis layers: The first layer contains the sidewalks of my town (polygons in blue). The second one contains the pavements (roads) of my town (polygons in brown). The map looks like ...
1
vote
1answer
45 views

Visibility analyses of two objects with ArcMap?

I'm struggling with a visibility analyses task in ArcMap. I have two objects: a spire and a WTG (wind turbine generator). Both are point features. The object's heights are deposited in the attributes ...
1
vote
0answers
69 views

Calculating spread of invasive species using ArcGIS for Desktop?

I have ArcGIS Desktop Advanced and so far have completed the following; Used Supervised classification on a satellite image to identify the invasive species with field verification. I have converted ...
3
votes
1answer
57 views

Watershed Tool Straight Edge Problem

I'm trying to accurately delineate a watershed into sub-basins using dams as pour points. I'm using the hydrology toolset, but I can't seem to get rid of straight edges that are along some of the ...
2
votes
2answers
448 views

Batch Extract by Mask, but customize individual output names

I want to extract by mask (the same mask everytime) on about 500 raster's, but I want to just append the name of every input raster. So if a raster is titled Landsat_010182 I just want to add _clip ...
0
votes
0answers
51 views

Working out percentage of different raster parcels in polygon?

I have a raster layer (LCM2007) that contains 24 classes of landcover and a shapefile, polygon, which represents areas in a survey. I want the area, or percentage, of each class in each area. For ...
0
votes
2answers
184 views

Expressing a Raster Calculator expression with Math Toolset

So here's the problem. I have two rasters containing bathymetry data: one containing the bathymetry of the sea floor, we'll call this raster1, and another containing the difference between two ...
2
votes
1answer
40 views

Adding separate distance files to calculate total distance in ArcGIS

I have two raster files: A raster of distance-to-outlet for a creek. Value = 0 at creek outlet (white), and the maximum value is at the beginning of the creek (black). A raster of Euclidean ...
2
votes
0answers
57 views

Spatial Analyst tools adding extra column of NoData

I've got a script tool in ArcGIS that runs Curvature and Aspect from Spatial Analyst, and the outputs of both contain an extra column. I've attempted to set the extent in the both the tool and the ...