All Questions
220 questions
0
votes
1
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616
views
Understanding ArcGIS Flow Direction pixel values?
The range of values in my flow direction raster is 1-129.
D8 method was used.
I would expect 128 to be the largest value in accordance with the documentation
what's more I show values OTHER THAN 1,...
- 952
0
votes
1
answer
648
views
Multiple Output for Zonal Statistics as Table [closed]
I am trying to merge NDVI data from 2005 to 2018 (two .tif per decade) with a region land use.
For this, I have used "iterate rasters" with 36 of .tif I'll be using, as the 'Input value raster' of ...
- 25
0
votes
1
answer
272
views
Incorporate treeline in viewshed analysis
I have performed a bare-earth viewshed analysis of a roadway corridor using a DEM, but upon further inspection on Google Streetview, realize that part of the road has dense trees along it. I need to ...
- 73
0
votes
1
answer
4k
views
Running ERDAS Imagine and ArcMap on same machine [closed]
ArcMap 10 and ERDAS 8.7 were already installed in my computer. But I want to open both programs at the same time. If ArcMap can open properly, ERDAS cann't open and vice versa, showed that following ...
- 659
0
votes
1
answer
620
views
Error: Intersect 2 polygons in Python. Record's geometry not match: 'GeometryCollection' != 'Polygon'
I'd tried replicating intersecting two shapefiles from Python or command line by anna-magdalena which requires intersecting two shapes. I used @gene answer for that:
import os
from shapely.geometry ...
- 283
0
votes
2
answers
424
views
Image Dodging (color matching algorithm) in ERDAS
I have two LISS 3 images acquired in Feb and March a year apart. I have performed atmospheric correction (haze reduction) for both the images individually before applying the color matching algorithm ...
- 5
0
votes
1
answer
439
views
Missing buffer values when using zonal statistics in ArcGIS Desktop?
I am using zonal statistics in ArcGis 10.2.2 to calculate the mean value of fire frequency within 1km buffers. However, I have noticed that this is not being calculated for all of my sites. There are ...
- 187
0
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0
answers
114
views
Aspect function creating empty raster using ArcPy
I am trying to derive the aspect from an elevation file. When I run the function it creates a new file but the file is empty. my code:
import arcpy, os
from arcpy import env
from arcpy.sa import *
env....
0
votes
2
answers
2k
views
Cell Size parameter for IDW (Spatial Analyst) tool
I am attempting to use the IDW (Spatial Analyst) tool in a Python script however I am a bit confused on what to put for the "Cell Size" optional parameter. When using the tool within ArcMap it seems ...
- 2,146
0
votes
1
answer
725
views
Determining Upslope and Downslope from Line Features to Map Hydrologic Capture Zones
I am trying to map hydrologic capture zones (HCZ). HCZ's are contributing areas upslope of any potential capture feature (i.e. road, pipeline path, railroad line), that would alter/impact the natural ...
- 235
0
votes
1
answer
706
views
Connecting address points to nearest part of a road network that has matching street name
In ArcGIS Pro (or ArcMap), using built-in Esri geoprocessing tools, how can I create connection lines between address points and the nearest part of a road segment with a matching street name (e.g. '...
- 588
0
votes
1
answer
1k
views
Calculating first quartile of a raster by zonal statistics?
I want to calculate the 1st quartile (25th percentile) of a raster (beneath polygons) using zonal statistics but it does not this option.
Zonal statistics has: MIN, MAX, MEAN, MAJORITY, RANGE, and ...
- 125
0
votes
1
answer
182
views
Using Combine function of ArcGIS Spatial Analyst?
I am trying to use the combine function on ArcGIS 10.3 for Desktop.
I have two raster files that have the same values and I want to combine them in order to compute an accuracy assessment through ...
- 103
0
votes
2
answers
107
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 ...
- 63
0
votes
1
answer
1k
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 ...
- 59
0
votes
2
answers
17k
views
Layer stacking Sentinel 2 imagery
Is it possible to layer stack all 13 Sentinel 2 bands or can I only layer stack those that are the same resolution (so for example the blue, green red and NIR bands). I have a very large area of ...
- 861
0
votes
1
answer
1k
views
Creating SpatialPolygons in R
I am trying to do kriging with my data. But there is a problem here. I want to use krige command in gstat package. But I do not have "Spatial object with prediction/simulation locations".
How I can ...
- 189
-1
votes
1
answer
675
views
Using arcpy.gp.Int_sa in ArcMap gives Error 000824 tool is not licensed?
My Arcpy code is not working in ArcMap 10.1 because an error with the last line:
Error 000824: The tool is not licensed.
I have all my extensions turned on, so I don't know why I would be ...
- 329
-1
votes
1
answer
6k
views
How do I subset image by vector layer using Erdas Imagine?
I have downloaded MODIS MOD10A2 8 day snow cover image. I need to subset this image. I tried to subset the image in erdas.
it says the AOI layer is empty.
-3
votes
1
answer
82
views
Spatial Analysis issues [closed]
I have this layers:
This one is the main layer (all of them are small polygons)
And this buffers
I need to cover all (or most part) of the pink polygons.
So I decided to make centroids (Only to keep ...
