All Questions
Tagged with arcgis-10.5 spatial-analyst
27
questions
1
vote
0
answers
101
views
Creating IDW of up to 20,000 points in ArcGIS Desktop? [closed]
I am create IDW interpolation of 60-70 points in ArcGIS. It takes 2 minutes. But when I create IDW of 20000 points in ArcGIS, it takes at least 4 hours and 30 minutes. I want to ask why takes much ...
- 11
0
votes
1
answer
627
views
Understanding difference between area calculation when using zonal statistics tool and identify button?
I am working in ArcGIS Desktop 10.5 and I am a beginner.
I have very basic, non-overlapping polygons over a raster that represents bathymetry data. I need to figure out various statistics about each ...
2
votes
2
answers
963
views
Fill sinks until a known value
I have a DEM and I want to fill every sink with a Value of 2 meter. If a sink is less than 2 meter, it is filled full and if it is bigger, it is filled until it reach 2 meter.
The problem is that ...
- 301
2
votes
1
answer
746
views
Inverting raster changes my min and max values
I am trying to invert a raster in ArcGIS (10.5), and have used the following expression (from esri support page) in the raster calculator:
invert = (("raster_file" - maximum) * -1) + minimum
However,...
- 148
1
vote
1
answer
82
views
ArcGIS '+' operator not working in Spatial Analysis package
The following python script is working:
import arcpy
from arcpy import env
env.workspace = 'C:/Users/Matthew/Desktop/ARC_processing'
file_path = 'C:/Users/Matthew/Desktop/ARC_processing/...
2
votes
1
answer
902
views
Flow accumulation map giving zero values
I have applied the flow accumulation tool in arcgis 10.5.
The results map has zero values in places that it should not, which makes the further processing of my images wrong.
Any idea why this ...
- 591
0
votes
1
answer
701
views
Con tool not working In ArcGIS Desktop 10.5?
I have a raster dataset [Flow Accumulation Raster]. Which is located in gdb. I need to perform Con Tool operation with this raster dataset. The Con Tool operation runs successfully with this dataset ...
- 193
3
votes
2
answers
459
views
Counting occurrences across many rasters using ArcGIS Desktop?
I am interested in drought occurrences in the US, especially how often droughts of a particular severity occur in particular regions. I’ve got nice vector maps from http://droughtmonitor.unl.edu ...
- 31
1
vote
0
answers
720
views
Zonal Statistics or Tabulate Area by Multiple, Cascading Zones [closed]
A basic GIS task that I regularly come across in my work is to calculate the area of a variable of interest by multiple, overlapping and/or hierarchical zones. I am looking for a more efficient way to ...
- 665
2
votes
1
answer
367
views
Hillshade error: output values all equal 180
I am having trouble producing a hillshade using the ArcGIS spatial analyst (hillshade) tool. I am working with a 1m DEM in a projected coordinate system (GDA_94_MGA56) and have adjusted the Z-factor ...
2
votes
2
answers
537
views
Ordering a road network based on "Strahler Stream Order"
I want to classify a road network similar to Strahler's Order (keep track of how many smaller roads flow into a bigger road). I'm working with mountain roads, so most of them "look" like rivers.
...
- 135
0
votes
1
answer
507
views
Removing Clouds From (Landsat8) NDVI Imagery with ArcMap? [duplicate]
I recently was able to generate NDVI images from Landsat 8 using Arcmap. My end goal is to run some zonal statistics over specific neighborhood polygons, however with the cloud values (ranges of 0.002&...
- 1
1
vote
0
answers
149
views
Comparing normalize options of ArcGIS Desktop?
I am wondering if the tool “rescale by function” is definitely doing the same than the raster calculator with the expression ("raster"-min("raster"))/(max("raster")-min("raster"))*100? (I guess so, ...
- 131
1
vote
0
answers
161
views
How to use bandwidth matrix from R in Kernel Density tool in ArcMap?
I want to calculate and map kernel densities using ArcGIS (10.5 so I am unable to use GME). I calculated a bandwidth matrix using the plugin method in the ks package in R. How can I input and use that ...
- 11
1
vote
1
answer
386
views
Getting extreme values for NDWI calculation for Landsat 8 Imagery
I am currently in a remote sensing course at my university and am working on a change detection project. I am having some trouble creating an ndwi raster from landsat 8 imagery. I am using arcgis 10.5....
- 599