ArcGIS is Esri's GIS platform name. DO NOT USE this tag except for questions concerning the ArcGIS platform AS A WHOLE. Product tags (arcgis-desktop, arcgis-server, arcgis-online, etc) combined with version tags (arcgis-10.3, arcgis-10.2, etc) are preferred

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29
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2answers
2k views

Streamlining Python Code for Big Data

I have Python code which is designed to take point shapefiles through the following workflow: Merge points Integrate points, such that any points within 1 m of each other become one point Create ...
22
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3answers
4k views

How to hide “internal” polygon boundaries?

We've been scratching our heads over how to tackle this for some time, and are no more illuminated than when we started. I hope you can help. Our task is thus: how to draw a lake with a solid outer ...
16
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4answers
8k views

The simplest way to uninstall any and all ArcGIS products?

What it is the simplest and most straightforward way to uninstall any and all ArcGIS products more or less in one go that might be present on a Windows machine? perhaps scriptable? Add/Remove ...
14
votes
3answers
661 views

Ecological geospatial conundrum

I am looking for a different, more elegant solution to a spatial statistics problem. Raw data consists of an x-y coordinate for each individual tree (i.e. converted to a point .shp file). Although ...
14
votes
3answers
576 views

How to determine if trees within forest gaps are clustered?

The attached dataset shows approximately 6000 saplings in approximately 50 variable sized forest gaps. I am interested in learning how these saplings are growing within their respective gaps (i.e. ...
13
votes
1answer
895 views

How can I utilize NumPy arrays to optimize big data geoprocessing?

I'm interested in learning how to utilize NumPy arrays to optimize geoprocessing. Much of my work involves "big data", where geoprocessing often takes days to accomplish certain tasks. Needless to ...
12
votes
4answers
913 views

Applying version control to ArcGIS Models

Version control is an indispensable tool for software development, allowing one to reliably and cleanly step back in time to the last time X did it's job exactly right, or to see what changed between ...
12
votes
3answers
4k views

How to find and merge duplicate points?

I have two point shapefiles: Red and Blue. Each point shapefile has a z value which represents a radius (i.e. represented as buffers in the example). A duplicate point is defined as a point that ...
11
votes
4answers
3k views

Programatically split a polygon with a line

In looking at this question, it occurred to me that I am not sure how one would go about using geoprocessing tools in ArcGIS to split a polygon with a line programatically. Manually, you would use ...
10
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5answers
6k views

How to calculate Topographic Ruggedness Index in Arcgis?

Does anyone know how to calculate Topographic Ruggedness Index in Arcgis without access to command line arcinfo workstation? "The topographic ruggedness index (TRI) is a measurement developed by ...
10
votes
2answers
2k views

Methods for optimizing multcore processing in ArcGIS

I am interested in learning methods to utilize the full extent of multicore processing power available on a desktop computer. Arc states that background geoprocessing allows the user to utilize ...
10
votes
2answers
1k views

How to create a transparent box in the map layout?

Is there a way to create a transparent box in the ArcGIS layout view similar to the one in the screenshot? I have tried without success adding a transparent box by inserting a neatline, adding a new ...
10
votes
1answer
5k views

“Field Mapping” in ArcGIS 10 - ArcPy

I've wrote a Python script that does a spatial join and some simple calculations. My problem is with setting the merge rule for one specific field, and leaving the rest of the fields as is. For ...
10
votes
1answer
374 views

How to create an error map to support an average kernel density map?

I've created an average kernel density map by running KDEs on points stacked within the same spatial extent. For example, say we have three point shapefiles representing seedlings in three different ...
10
votes
1answer
318 views

Open-source software for managing terabytes of different formats of geospatial data?

I have a problem that I am sure many GIS Teams or Departments have which is how to find, keep track of and manage multiple different datasets from multiple sources. I have read the responses from a ...
10
votes
7answers
2k views

How to identify polygons with “flag” sliver errors

Working in ArcMap, I have come across errors in a polygon layer that I will call "flag slivers" (taken from similar language in parcels call "flag lots"). These sliver polygons (see image below) are ...
10
votes
4answers
534 views

Does SHAPE_Length take into account elevation values?

Does the Shape_Length attribute take into account the elevation? For instance, if I have 3 points: A, B, and C A.X = 10 A.Y = 10 A.Z = 10 B.X = 10 B.Y = 10 B.Z = 50 C.X = 0 C.Y = 0 C.Z = 10 Then I ...
9
votes
7answers
6k views

How to get raster image as array in Python with ArcGIS

When starting to work with Python and ArcGIS 9.3, I assumed there would be a simple way to get a raster image into a Python array so that I can manipulate it before storing it back as another raster ...
9
votes
2answers
1k views

How to bypass errors in arcpy for/while loop?

I have a handy script tool that loops through a workspace and renames and copies shapefiles to a feature dataset. However, if there is a corrupted shapefile somewhere in the workspace the script ...
9
votes
5answers
14k views

Is there a tool or process that will automatically snap endpoints of polylines within a given proximity (ArcMap 9.3)?

A friend of mine created a network of polylines that were all supposed to be connected. However, he just realized that many of the endpoints of the lines aren't connected, but are very close. I told ...
9
votes
3answers
636 views

How to create random points outside polygons?

The tool Create Random Point is able to generate a certain number of points within polygons. I am wondering, given a bounding box, is there any way that I can generate random points outside those ...
9
votes
1answer
2k views

Difference between network dataset and geometric network

In ArcGIS, what is the difference between a "network dataset" and a "geometric network"? Are there differences with what can be done with each?
9
votes
3answers
2k views

How can I speed up slow-loading, template-generated MXDs?

I have an ArcMap template (.mxt) file which causes .mxd documents created with it to take 5-10 minutes to load (if it ever loads). Even after stripping out all the data sources and tables, the issue ...
9
votes
2answers
2k views

Is there a ArcGIS python script development API?

I'm a somewhat experienced software engineer new to the GIS world. I started working on a GIS project that supports ArcGIS 9.3 and 10.0 and looking through existing code it looks like the main ...
9
votes
6answers
4k views

Is there an existing library for converting ArcGIS Features to Json?

Is there an existing library for converting ArcGIS IFeature types to and from Json/GeoJson?
9
votes
2answers
696 views

Can ArcGIS and OSGeo4W share the same python install?

I don't like unnecessary duplication. Is it possible to install python only once and have both ArcGIS and OSGeo4W use it?
9
votes
4answers
24k views

Add Google Basemap to ArcGIS

I am looking for a way to add Google Earth imagery to ArcMap 10. Over a year ago, a GIS.SE member mentioned Arc2Earth was the only way to accomplish this (04/2011 thread). Another somewhat ...
9
votes
4answers
462 views

How do I figure out if there are clusters of one set of points around another set of points from a different layer?

I want to see if there is clustering of a certain type of buildings (x) around another type of buildings (y). The two point files are in different layers. I cannot figure out which tool I would use to ...
9
votes
3answers
1k views

How to combine corner-touching polygons into a single feature

I have created a polygon layer from rasters, and only have a single classification ID (and calculated acres) for each polygon. I would like to "dissolve" all touching features into larger, individual ...
9
votes
3answers
1k views

Best ways to embed dynamic maps into PDF files

Working in consulting, I found that sending clients PDF file with my embedded maps is one of the best ways to achieve a wow-effect from them. The latest pdf file formats all support the layers feature ...
9
votes
1answer
8k views

Which is the correct projection in ArcGIS for EPSG:3857/900913?

I want to publish a mapservice in ArcGIS server, which will be overlayed on Google Maps or Bing Maps. For this, the Map Service needs to be in EPSG:3857/900913. The Google Maps projection is supposed ...
9
votes
1answer
525 views

Any experiences or “gotchas” integrating Whitebox GAT (free and open) with the ArcMap UI?

I wrote a number of ArcGIS VBA automations in grad school; however, they're fully dependent on the ESRI SpatialAnalyst extension, which is not only closed-source but expensive to the point of ...
9
votes
1answer
1k views

Why does ArcGIS “forget” my specified default GDB for a map document (mxd)?

I'm using ArcGIS 10.0 on Windows 7 64 bit Ultimate. I've noticed that sometimes ArcMap's geoprocessing tools as well as scripts seem to forget my setting in the mxd (confirmed via arcpy.env.workspace ...
9
votes
2answers
1k views

Transform metadata in xml format to html

I extract metadata from the GDB_UserMetadata SDE table. Now I want to transform that xml to html so that I can view it from my browser. To do that I use the ISO.xsl stylesheet found in C:\Program ...
8
votes
3answers
4k views

How do I use variables from one Python script in other Python scripts?

I want to set up a single python file containing variables that have the locations of all my data sources. This would then be used by all my other scripts, then as a data source changes, I only have ...
8
votes
4answers
285 views

Subset Folder Contents ArcPy

I have about 1500 .txt files within a folder named 3410001ne => 3809962sw. I need to subset about 470 of these files to process with a Python script. Below is the section of code prior to my for ...
8
votes
4answers
625 views

How to publish maps to web with no programming required?

I am new to GIS web development. I do not have any programming background and I want all the maps that I design in GIS (shapefiles, using ArcGIS 9.3) to be published on the web. Please tell me the ...
8
votes
4answers
2k views

How to trace a line layer (road network) through points?

OK. I've been reluctant to post this, but I've just about given up. I have a road network (purple), Point files (green) and a beginning point (yellow). I want to trace the point files based on the ...
8
votes
3answers
1k views

Map Application Requires Refresh to Initialize

I tried this question over on StackOverflow but didn't get any answers. Hoping you all might be able to help. Creating a web mapping application in Javascript/Dojo: When I load the app in a browser ...
8
votes
7answers
6k views

How do I select by month in a date/time field?

I would like to select by a specific month from my date/time field in ArcGIS, and just can't seem to find a statement that will work. I have multiple years and multiple days, but want to filter those ...
8
votes
6answers
1k views

How to integrate SAGA Python Modules into ArcGIS Desktop?

I have been having a look at SAGA (http://www.saga-gis.org/en/index.html) and it seems to have some nice tools for geoprocessing. I was wondering if anyone out there has had any luck bringing SAGA ...
8
votes
2answers
1k views

How do I combine high resolution and generalized hillshade rasters to produce enhanced shaded relief?

I often add LiDAR data to a map along with a shaded relief. Most of the time i have to generalize the LiDAR dem depending on the scale of the map. Still, there is often too much detail and mountain ...
8
votes
3answers
3k views

How to query all records (>1000) and export to csv?

I posted in arcgis forum but never got any answer. Can anyone tell me how to solve this? Assume you have a vehicle tracking records from Oct.1 to Dec. 31 with wind speed information. All data is ...
8
votes
1answer
176 views

The role of '#' in a python 'if':

I recently exported an ArcGIS model to python and was reviewing the script and am confused by the following line: if TRU_W_DatableFeatures == '#' or not TRU_W_DatableFeatures: I can't seem to find ...
8
votes
4answers
1k views

How to split points by polygon?

I am looking for a way to split points by a county polygon feature class. The attached image shows two feature classes: one composed of points and the other a county polygon feature class. The split ...
8
votes
2answers
2k views

ArcGIS 10.1 edit PostgreSQL layer

I've been working with QuantumGIS/PostgreSQL/postGIS for a while now, without problems. But now I have to change QuantumGIS for ArcGIS 10.1. I'm having trouble adding a layer from PostgreSQL and ...
8
votes
3answers
2k views

Transform bookmarks to data driven pages in ArcGIS?

We have this large project in ArcGIS with 30 maps with different extents using Bookmarks to pan between these maps/pages. Now we would like to use Data driven pages instead. The question is, is it ...
8
votes
3answers
1k views

How to get full path of layer selected in drop-down box for ArcGIS Python tool

I have a Python script-based tool in ArcGIS. One of the parameters for the tool is an input raster file, which I've set (using the properties of the tool within the toolbox) to be a Raster Layer. This ...
8
votes
3answers
826 views

Are there any training resources in SQL and Python as applied to GIS database management?

I've taken ESRI database courses, which have been helpful to my work. But I also need training in SQL and Python as applied to GIS database management. Any suggestions?
8
votes
1answer
400 views

How can I use an ArcGIS.com map that's not shared with everyone from JavaScript API?

I like to use the ArcGIS.com to create a map with operational layers on top of a baselayer. I would like to have the Content and Map as private but to show the map in an application built with ...