All Questions
2,694 questions
10
votes
3
answers
6k
views
Workflow for determining stream gradient?
As far as data goes, I'm working with NHD .shp files, 10m DEMs, and some LIDAR data.
My goal is to determine gradient for 100m segments of a network of streams.
I'm already able to do this, but I ...
- 930
9
votes
6
answers
37k
views
Representing several points with same coordinates on map using ArcGIS Desktop? [duplicate]
I'm working on Arcgis 10.
I have a point shapefile representing events with several points having coinciding coordinates (They have the same coordinates). For representing them in a dynamic way, I ...
- 3,185
9
votes
2
answers
1k
views
Creating summary table of symbology of all datasets in multiple MXDs?
This is related to the following Retain ESRI symbology in Mapinfo TAB . As an initial step (in arcpy) I want to access the symbology of all the datasets and create a document which has the details of ...
- 8,298
8
votes
4
answers
12k
views
Debugging RuntimeError: workspace already in transaction mode from arcpy.da.UpdateCursor and ArcSDE feature classes?
I am making my first attempt at editing an ArcSDE feature class with python through a da.UpdateCursor. I'm essentially taking code I've written for a file geodatabase feature class and applying it to ...
- 13.9k
8
votes
4
answers
4k
views
Extracting Values to Points without ArcGIS Spatial Analyst?
I have a raster DEM & multiple points. I want to determine the DEM elevation at each point. Other than manually examining the DEM at each point, (very time consuming with lots of points) is ...
- 542
7
votes
4
answers
5k
views
Unsplit/Dissolve multiple touching lines in Stream Network using ArcGIS Desktop?
I am trying to dissolve multiple lines for stream networks into individual features. The dataset contains many stream networks so a complete dissolve of the whole dataset wont do as I would like to ...
- 429
5
votes
2
answers
3k
views
Performing Point Distance analysis using Basic level license of ArcGIS Desktop?
I am using ArcView (ArcGIS Desktop Basic) 10.1 and I need to perform a point distance analysis.
What are the steps to determine the distance from A to B-Z, B to A-Z, C to A-Z, etc?
4
votes
1
answer
3k
views
How to run OGR in ArcGIS Scripts?
When I run my script outside ArcGIS it works because during execution script uses a GDAL and OGR modules from osgeo. When I use script as a tool in ArcGIS it does not work. In PySripter I can import ...
- 389
3
votes
1
answer
5k
views
Iterating through columns in table using ModelBuilder?
I am unable to find any info on how to use ModelBuilder to run a certain spatial analysis function on each column in a table.
I have a table to sample locations and at each location there are a ...
- 471
3
votes
1
answer
409
views
Why isn't the service layer shape properly spread out?
I created a simple service layer polygon in network analyst (ArcGIS Desktop 10.2) with no hierarchies set in the street network. Now I don't understand why is this polygon created along some ...
- 736
2
votes
4
answers
7k
views
Splitting multiple polylines by distance in ArcMap
Is there a method to split thousands of polylines by employing a tool like the "Editor" - "Split" method and using distance, in ArcMap?
When I utilize the "split" - &...
- 61
2
votes
2
answers
3k
views
Using sieve filter in ERDAS Imagine and/or ArcGIS for Desktop?
Where can i use a sieve filter for my supervised classification?
Can i do it in Erdas Imagine or in ArcGIS?
I can't find it anywhere.
- 21
38
votes
11
answers
116k
views
Performing reverse clip in ArcMap
Is there a way to perform a 'reverse' of the clip function in ArcMap?
I am not exactly sure how to explain this so here is a diagram:
- 2,483
37
votes
3
answers
29k
views
What is the proper syntax and usage for ArcGIS "in_memory" workspace?
I am unclear how best to use the in_memory workspace in ArcGIS. The best resource I have found on the subject is from ESRI on Using in-memory workspace. Unfortunately, the help section is not very ...
- 51.8k
33
votes
3
answers
12k
views
How to hide "internal" polygon boundaries?
Our task is to draw a lake with a solid outer perimeter line and no lines between internal wetlands, shoals and shallows? 'Tis a relatively straightforward process with Arcinfo coverages and Regions, ...
- 28.3k
25
votes
5
answers
33k
views
Adding PDF (especially GeoPDF) to ArcMap as data?
I receive a lot of PDF maps (vector, image, with georeference and without) and I am having to convert them to an image file before I can add them to ArcMap and georeference.
I can't see any obvious ...
- 20.4k
21
votes
7
answers
19k
views
Recalculating full extent of File Geodatabase feature class?
I have a featureclass in an Esri file geodatabase. When I edit the features using the editor in ArcMap, and I delete most of my features and keeping only the ones in the middle, the zoom to layer ...
- 521
20
votes
3
answers
5k
views
Producing building shadows using ArcGIS Desktop?
How would you generate building shadows from building footprints?
I have attribute values for the heights of buildings.
So would preferably like to have the shadows' sizes vary based on that.
The best ...
- 413
18
votes
0
answers
8k
views
Creating trade flow maps in ArcGIS for Desktop (or any free software)? [duplicate]
I am trying to represent trade flows on a world map where the size and direction of arrows indicate the exports/imports of a given country.
This type of map is commonly found in magazines and ...
- 2,810
15
votes
4
answers
11k
views
Re-ordering fields permanently using ArcGIS Make Query Table tool?
In the Answer to Reordering fields (permanently) in file geodatabase using ArcGIS Desktop? it was stated that the Make Query Table tool could be used to re-order fields in tables and feature classes ...
- 65.4k
14
votes
2
answers
30k
views
Installing 64-bit geoprocessing of ArcGIS for Desktop?
I am trying to install 64-bit processing to ArcGIS 10.2, but the ESRI Patches and Service Packs website only has installations for Service pack 1 that goes with ArcGIS 10.1.
One similar question on ...
- 1,177
12
votes
2
answers
4k
views
Making Map Book of pages with same area shown but different layers turned on/off
In ArcMap a Map Book is best suited for a series of features that each get their own page. It allows you to pick a feature and generate a Map Book Page for each feature including any additional ...
- 655
12
votes
5
answers
65k
views
Creating polygons from lines using ArcEditor/Standard level license of ArcGIS Desktop?
I am trying to create polygons from a line layer of lots and concessions (large blocks of land in rural areas).
The lines are mainly grid style as they intersect mostly at right angles.
I need to ...
- 899
12
votes
2
answers
14k
views
Converting from DMS to DD using Python in Field Calculator?
I need to convert lat/long that is expressed as degrees, minutes, and seconds in the data into decimal degrees. For example, in the data, they are listed as N335042.06 in the Latitude column, and ...
- 981
11
votes
2
answers
5k
views
Finding if polygon has hole using field calculator in ArcMap
Some 3rd party software cannot handle polygons with holes (donut polygons).
To find them I always use ArcView 3 field calculator, because:
however when I try to do this in ArcMap, I get this:
How do ...
- 23.3k
11
votes
6
answers
17k
views
Creating duplicate features based on many-to-one conversion of related table?
I need to create duplicate features (in this case parcels), using a related table to populate ID fields. In essence, I need to use a related table of parcel owners to create duplicate parcels, each ...
- 161
11
votes
7
answers
81k
views
Extracting raster DEM elevations to vector attribute tables using ArcMap without 3D or Spatial Analyst
I have an ArcMap 10 project with multiple layer groups. One layer is a raster DEM, another layer group is a bunch of vector shapefiles (including points, lines and polygons). The client wants all ...
- 111
11
votes
5
answers
27k
views
Adding file name to attribute field using Calculate Field?
Does anybody know how to add the shapefile name to a field in the file's attribute table?
I've found a description:
'You have to use inline variable in CalculateField like %Name% in
expresssion ...
- 335
11
votes
5
answers
55k
views
Measuring area of raster classes?
Are there any tools or methods in ArcMap that can measure the area of each level of the kernel density output?
Note this is just a kernel density plot (not a shape file or polygon). Kernel Density ...
- 195
10
votes
3
answers
9k
views
How does ArcGIS compute the distance between two points with a non-equidistant projection?
This is a follow-up question to my previous one, Can you suggest some well-written introductory texts about coordinate system projections?
Let's assume I'm working with the CH1903 map projection, ...
- 1,161
9
votes
3
answers
4k
views
Calculating all distances from single points to multiple polygons [closed]
I have two layers: a point layer defining properties (95 objects), and a polygon layer defining plots of land associated with the properties (211 objects). Each point relates to one or more polygons. ...
- 385
9
votes
2
answers
3k
views
How to create an oriented buffer using arcpy?
I would like to create an oriented buffer for every polygon in my shapefile using arcpy. By oriented I mean that I have two angles a1 and a2 that constraint the direction of the buffer. This is ...
- 625
9
votes
6
answers
5k
views
Finding minimum bounding extent of given pixel value within raster?
I am wondering if there is a way to find the minimum bounding extent for a raster with a particular value. I clipped a raster from a global image and the extent is set as the global extent with a lot ...
- 2,215
9
votes
5
answers
17k
views
Batch exporting MXD to PDF files using ArcGIS Desktop?
Nico Burgerhart made a fantastic script called "Batch export MXD to PDF" back in 2008.
http://arcscripts.esri.com/details.asp?dbid=14872
Any ideas how to implement it in ArcGIS 10? Something ...
- 2,059
8
votes
2
answers
4k
views
Achieving Super or Subscript graticule labels in QGIS Composer windows?
It is quite common for paper topographic maps to label the map graticule with ordinate values in a mixture of superscript and standard digits, eg. ⁴123⁰⁰⁰ to emphasise the significant digits.
The ...
- 3,427
8
votes
3
answers
10k
views
Splitting lines automatically at specific distances using ArcGIS Desktop?
I have a set of polylines which I need to split at varying distances from their starting points.
In general, I'm looking for a something similar to the SPLIT function within the editor tool. There ...
- 2,586
8
votes
2
answers
6k
views
Troubleshooting ERROR 000989 Python syntax error from ArcGIS Field Calculator?
I'm trying to used the Python syntax in ArcGIS 10's field calculator and am thoroughly confused. So far the most basic calculations are failing me, and I don't understand why.
I'm trying to create a ...
- 16.3k
8
votes
3
answers
9k
views
Adding "noise" to overlapping X,Y coordinates so no longer in EXACT same place?
I have a series of points representing animal observations. Many of them overlap, having the exact same coordinates, and this is causing me trouble when I want to run some analytical tools which ...
- 81
7
votes
3
answers
20k
views
Removing spatially duplicate features using ModelBuilder?
I am creating a model to remove features which are duplicated within a polygon feature class. Most of the features are duplicated once, but about a quarter have up to three or four exact copies. I do ...
- 4,055
6
votes
5
answers
5k
views
Counting number of lines connected to point?
I have a water network which and I need to install elbows and Tees (T). When 2 lines connect to a point, I want to install an elbow, when 3 lines connect, I want to install a Tee.
How do I get ...
- 71
6
votes
3
answers
11k
views
Resizing image resolution in ArcGIS Desktop?
I have NDVI images (250 m) and Soil map (1000 m).
How can I change the resolution from 1000 m to 250 m, so I can compare/work with them?
- 579
6
votes
3
answers
2k
views
Summary table with a field that shows components of each summarized record
I have a table with 2 fields the first is for community and the second for the main community that it belongs to, as in the image
I want to summarize the second field (Belongs_to) but with an extra ...
- 61
5
votes
1
answer
5k
views
Creating custom coordinate grid using QGIS
I am using QGIS 2.14.2.
I want to create a custom grid different from latitude / longitude, with letters and numbers on the axes.
X = A, B, C, D, E, ...
Y = 1, 2, 3, 4, 5, ...
A
B
C
D
E
1
2
3
4
...
- 1,135
3
votes
3
answers
12k
views
Why do ArcToolbox tools give ActiveX error?
I work with ArcGIS 9.3. When I try to run any ArcToolbox tool I receive the message:
Window Internet Explorer [Title of the Window]
One or more ActiveX controls could not be displayed because ...
- 1,039
35
votes
9
answers
79k
views
Adding GPX files into ArcMap?
What is the smoothest route, the easiest user experience, to add gpx files to ArcMap?
Ideally, I'd like to interact with .gpx with the same facility as .shp, being able drag'n'drop onto the map ...
- 28.3k
27
votes
2
answers
9k
views
Creating Thiessen (Voronoi) polygons using lines (rather than points) as the input features?
I have a set of line features inside a particular polygonal boundary. For each line, I'd like to generate a polygon inside which every possible point is closer to the given line than to any other line ...
- 12.3k
22
votes
9
answers
73k
views
Changing Field Name in ArcGIS Desktop
How can I change the field names (not the alias) in ArcGIS 10.2?
I already found this page on ArcGIS support: "Renaming shapefile fields (Defense Mapping)" but there is is not "Defense ...
- 1,498
20
votes
8
answers
59k
views
Select distinct values from a single column of an attribute table (or layer)
Is there a way to select distinct values from a column in ArcMap?
I have the data in both GDB and SHP formats.
I have searched for ways to select using SQL, QueryLayers, ModelBuilder and individual ...
- 410
17
votes
3
answers
55k
views
Removing duplicate features with same geometry in ArcMap?
Is it possible to uniquely identify each geometry in a feature layer?
Essentially I have a polygon feature layer with many rows of data represented by the same geometry. I would like 1 row for each ...
- 530
15
votes
4
answers
37k
views
What is layer file (*.lyr) in ArcGIS Desktop?
My organization uses *.lyr files consistently as a means for our users to view the data and build their mxds.
It works great for our purposes, but we have run into an issue where we don't think the ...
- 4,580