Questions tagged [arcmap]

ArcMap is the main application of ArcGIS for Desktop and the tag for that (arcgis-desktop) should normally be used in preference

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61
votes
3answers
76k views

Layers with same coordinate system should align/overlap in ArcMap but do not?

I put 4 different layers into my ArcMap document, but only one of them will show up on the map! I should be seeing the other 3 layers as well. When I do a Zoom to layer, I can see one layer, but I ...
37
votes
21answers
30k views

Connecting to PostGIS database from ArcMap for display and query without ArcSDE?

How can I connect to a PostGIS database from ArcMap using ArcGIS Desktop 9.3 and later? I would like to be able to perform spatially enabled queries and receive the results back (e.g. spatial and non-...
30
votes
9answers
65k 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
votes
1answer
6k views

Calculating Flow Direction and Delineating Basins from Projected vs. Unprojected DEM Data

This is somewhat of a theoretical question stemming from some discussions with colleagues on the topic of implications with delineating basins with projected (e.g., Albers Equal Area) vs. unprojected (...
26
votes
10answers
57k 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:
25
votes
7answers
45k views

Changing data source for all layers in MXD?

I have an MXD. It connects to about 30 layers in one of our SDE databases. I want to change the SDE database they connect to. Is there a way to do this without having to right-click every layer ...
24
votes
9answers
65k views

Extracting coordinates of polygon vertices in ArcMap?

I've got about a dozen polygons in a feature class loaded in ArcMap 10, all in geographic WGS 1984. How do I easily obtain the coordinates associated with each vertex of each polygon in that feature ...
24
votes
5answers
9k views

What makes a MXD file size larger and how to decrease its size?

I know that MXD contains information about layers, symbology and configuration of default tools. I have a few that are exceeding 50 MB and are starting to take a while to load up. What are some of ...
23
votes
3answers
1k views

Counting consecutive pixel values for set of rasters using ArcGIS Spatial Analyst?

I'm using ArcGIS 10 with Spatial Analyst. I have a set of rasters (8 in total) that only every contain a 1 or a 0 for each cell. Each raster represents a different years worth of data. For arguments ...
22
votes
5answers
13k views

Optimal video cards for GIS programs [closed]

I recently purchased a Dell XPS-8300 (i7-2600|16 GB DDR3 RAM|64-bit Windows7) which I intend to use primarily for GIS programs. I bought a refurbished model because it was much cheaper and because I ...
22
votes
5answers
26k views

How to produce a better inset map in ArcMap?

Attached is an example of a generic inset map designed in ArcMap 10. For all the wonderful things that this software can accomplish, there has to be a more sophisticated way to produce better looking ...
21
votes
5answers
26k 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
votes
8answers
40k views

How to manually break statement execution in Python window of ArcMap?

How does one break the execution of a long-running process in the python console of ArcMap? For example, how do you break a long iteration like the one below once it is started? for i in range(1, 50)...
20
votes
3answers
4k 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 ...
18
votes
7answers
16k 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 ...
18
votes
7answers
19k views

How to change the order of features in a shapefile?

I have a shapefile and I want to change the order of the features. Is that possible? I want to sort the features in the shapefile because I'm embedding this shapefile in a mobile app. The app will ...
17
votes
6answers
18k views

Copy, not export, a table from Arcmap

How can I copy a table, or selection of rows or columns in a table, from Arcmap without going through the pointy-clicky-typey exercise of Export table? The destination of said copy could be anything: ...
17
votes
11answers
22k views

Why won't ArcMap 10 snap? [closed]

I'm really confused by this. ArcMap will seeminly randomly decide to not allow snapping when editing. Sometimes its only for certain features, sometimes for only parts of the same feature (e.g. one ...
16
votes
8answers
45k 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 ...
16
votes
3answers
28k views

Rounding column in attribute table using ArcGIS Field Calculator?

I want to use the Field Calculator in ArcMap to round an existing column to two decimals. Currently I have a column that is 6 decimal places long and would like to simply round it down to 2 decimals. ...
16
votes
5answers
57k views

How to split a polygon into multiple equal-width polygons in ArcMap 10?

I am adding parking spaces into a parking lot, and I need them to be exactly the same shape and not overlap each other or have spaces between. In ArcMap 9.3, there was an editing task that allowed you ...
16
votes
4answers
26k views

Automated/geoprocesing tool to slice, clip, or cut polygons using polylines using ArcGIS Desktop? [duplicate]

Looking for a simpler method here. I am trying to split up / cut / slice existing polygons by using existing poly-lines. An example would be splitting a water body or land parcel at the point where a ...
15
votes
5answers
5k views

Using Hillshade option in ArcMap?

Here is a pretty pic of the raster I am using - with no effects applied - just the color ramp and histogram adjusted to show out all the relief - albeit in a very 2D way! I have a raster layer that I ...
15
votes
7answers
9k views

Find/Replace Double Quotes using Python Parser of ArcGIS Field Calculator?

I'm trying to use the Field Calculator (ArcMap 10.0) to strip out double quotes in an address field (I didn't put them in there, believe me). I've tried many incantations but am still unable to even ...
15
votes
4answers
20k views

How to use consistent symbology between multiple stretched rasters in ArcMap?

I have a series of continuous rasters representing the same phenomenon over time, so I need to use the same symbology across them all. So I set the stretched symbology of the first raster, with a ...
15
votes
3answers
41k 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 ...
15
votes
2answers
11k views

Correcting gaps and overlapping polygon (parcels) geometry

I have come across a resource that we rely upon almost daily that is in terrible need of repair. It is not our own product and the supplier is generally not interested in fixing the problem. We are ...
14
votes
4answers
5k views

Does a large amount of GPU memory help when working with very large images and image mosaics?

It seems like it would help a great deal to store as much of the image as possible on the GPU for panning and zooming, etc. We deal with a lot of very large images. Many range from 8 GB to hundreds ...
14
votes
6answers
8k views

ArcMap Add-in with app.settings not recognizing app.config changes?

I have developed an ArcMap Add-in which requires a configuration file. After spending a while trying to read config values from a single App.Config file (and always getting null) I believe that the ...
14
votes
1answer
475 views

Python increasing the filesize of my .mxd

I have a geoprocessing script that runs the following.. arcpy.AddMessage("TEST...") Yes just one line of code. A blank .mxd starts at 391kb for me as I run my script and save the filesize increases....
14
votes
1answer
2k views

How to get selected Features/Geometry from Windows Clipboard in ArcMap/C#?

I have a custom tool in ArcMap 10. The Workflow is the following: Select Features in a Layer with the "Select Features by Rectangle" tool Copy the Features to the Clipboard using STRG+c Select the ...
13
votes
4answers
5k views

Defining parameter descriptions for Python Toolbox help?

I'm trying to create some Python Toolboxes for our ArcMap application (e.g. MyTool.pyt) I can see that the help text is defined with the classes self.description attribute. However, once I run the ...
13
votes
4answers
24k views

Setting which layers are selectable in ArcMap?

I cannot figure out how to toggle selectable layers in ArcMap 10. In 9.3, I remember being able to choose from a list which layers I wanted to be able to select features from in the map. Let's say ...
13
votes
1answer
22k views

Calculate area within Python script in ArcMap

I am trying to calculate the area of a polygon within my Python script. I create a new polygon from merging two together, and I'd like to add the area of the resulting polygon to a field in the output ...
13
votes
3answers
5k views

Deleting large numbers of fields in ArcGIS 10

It there a good strategy for deleting a few thousand fields from the attribute table of a shapefile in ArcGIS using either ArcMap or ArcCatalog? I know how to manually right-click and choose 'delete ...
13
votes
2answers
14k views

Automatic text wrapping in ArcMap layout text element?

How can I word-wrap a text element on an ArcMap layout, when it contains a lot of text? go into Layout mode choose > Insert > Text paste in a long text block eg lorem ipsum The text block now ...
13
votes
2answers
3k views

How to disable and enable drawing in ArcMap using Python?

The script that I'm writing repositions two data frames and sets their extents. When doing this, it redraws the entire Active View 4 times, slowing the script substantially. Pressing F9 or ...
13
votes
2answers
5k views

Difference between Heat Map and Hot Spot Analysis?

What is the difference between "Heat Map Analysis" and "Hot Spot Analysis"? Are we perhaps using hot spot analysis to get the required relations between features, and then using the results as an ...
12
votes
4answers
27k views

Tool or process to automatically snap endpoints of polylines within given proximity using ArcMap?

I created a network of polylines that were all supposed to be connected. However, I just realized that many of the endpoints of the lines aren't connected, but are very close. I think there should ...
12
votes
6answers
23k views

Partitioning Line into Segments using ArcGIS Desktop?

I have a shapefile of U.S. states. I extracted the boundary between two states, resulting in a line segment. For example, the boundary between Georgia and North Carolina. Is there a way to ...
12
votes
6answers
5k views

Identifying true curves/arcs in ArcMap?

The only good way of creating circles in ArcMap is using true arc, (compound curves) but I need to convert those to vertex (densifying) because of a compatibility problem. I need info for geodatabase ...
12
votes
4answers
5k views

Comparing two Digital Elevation Models (DEMs) from LAS files?

I have two LiDAR files (.las), one is original let's say with X points. And the other is copy of the first .las file but with Y points, where Y is less than X. Now, I want to compare the Digital ...
12
votes
1answer
28k views

Creating and re-using map template in ArcMap?

I am using ArcMap 10.1 and working on a project which requires 5 different analyses on the same data. I created five map documents (.mxd) and completed my analyses. Now, the problem is that I want to ...
12
votes
1answer
9k views

How do you view multiple tables at the same time in ArcMap 10?

My original question was: How do you undock the tables in the ArcMap attribute window? because that's how I thought it should work in the new ArcGIS 10 docking environment. Either it isn't ...
12
votes
1answer
779 views

Stop ArcMap from probing missing data sources on launch

When migrating a map from one environment to another (say, from an existing client environment to our development environment) we're often given MXD documents that represent the map. These documents ...
11
votes
5answers
25k views

Creating polygons around extent of similar points using ArcGIS Desktop?

I've millions of points collected for lithology layer. They have used a coding for different types of rocks. I need to create a polygon around the extent of similar points. What is the easiest ...
11
votes
4answers
17k views

Adding simple table of text (Excel) into layout and preserving formatting and clarity?

I am trying to put a simple table of text (excel) into my layout and preserve cell formatting including alignment, borders and text sharpness. I've tried many approaches but nothing so far is ...
11
votes
2answers
469 views

Select by Attributes - Strings with < 5 characters

I have a column of zip codes which are strings. Most of them are the usual 5 digit zip codes, but some are only 3 digits or missing a digit. (keep in mind, I need this column as strings for other ...
11
votes
3answers
2k views

Which data format typically displays fastest in ArcMap?

My organization is working on an application running on ArcGIS Engine. Previous versions of the application used primarily Shapefiles for displaying roads, parcels, buildings, etc. Since I was ...
11
votes
1answer
441 views

Using Python to disable Scale map elements proportionally to changes in page size?

I am changing sources on MXDs in differents offices using ArcPy and ArcGIS 10.0. As observed here, the printer settings revert to the default printer when the instruction mxd.save() is sent. Losing ...