Questions tagged [arcgis-desktop]

Use this tag when ArcGIS Desktop is the product you are using but also tag for the application (ArcGIS Pro or ArcMap) that you are using.

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65 votes
3 answers
92k 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 ...
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10 votes
3 answers
7k views

Assigning point IDs to respective start and end attributes of polyline using Arc Hydro with ArcMap

I have two shapefiles, Point and Polyline. I'm trying to populate my polyline layer with the point data ID (systemID) where the lines start to where they end; eg. create two columns (from and to). The ...
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  • 159
39 votes
12 answers
70k views

Exporting feature class into multiple feature classes based on field values using ArcGIS Desktop?

I have a feature class with over 2,000 features, and I need to make them all individual feature classes based on a field. Is there a way to do this?
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  • 393
12 votes
1 answer
3k views

Auto incrementing field based on groups within feature class?

I am needing to auto increment a field based on groups within a feature class. I have 8 plots within a given polygon and I need to assign them an ID from 1-8 for each set of plots within each polygon. ...
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  • 123
21 votes
1 answer
5k views

Using customized Coordinate System in ArcGIS Desktop?

I don't know so much about coordinate systems... In my office we use to deal with spatial data coming from archaeological sites. Each site has its own x-y-z coordinate system (GCS). Three simple ...
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  • 451
9 votes
2 answers
1k views

Computing dominant area in polygon using ArcGIS Desktop?

First, I have a shapefile consisting of square grids and each grid has an ID. Second, I have a shapefile consisting of different zones (with IDs). A grid ID in the first shapefile can contain many ...
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  • 369
3 votes
1 answer
3k views

Graph/Network building and analysis of linked polygons in ArcMap

This is more of a follow-up question to Dividing polygons into *n* number of groups of equal counts with ArcPy? and Grouping village points based on distance and population size using ArcMap, ...
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  • 138
20 votes
5 answers
14k views

Using SRTM Global DEM for Slope calculation

I have downloaded SRTM GDEM (~90m resolution). I am using ArcGIS 10. I have tried to use the Spatial Analyst tool to compute for slope. However, I cannot compute for the slope. The output values has ...
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  • 1,188
7 votes
1 answer
2k views

Grouping village points based on distance and population size using ArcMap

How do I group a number of villages based on their distance to each other and total cumulative population size? I have a vector file of say 100 village points attached to atable containing data on ...
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3 votes
2 answers
6k views

Create a line perpendicular to an existing line in ArcGIS

For an existing set of line features, I would like to generate a perpendicular line, of say 1km, at the midpoint of each existing line feature in ArcGIS. I imagine that The methodology would be to: ...
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31 votes
6 answers
41k views

Creating Centrelines from Road Polygons/Casings using ArcGIS Desktop?

I want to create center lines from road polygons. Are there any automated tools in ArcGIS for Desktop to do this? I am including a Screenshot of my vector file below.
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  • 759
13 votes
3 answers
14k views

Calculating sequential numbers into sorted table using ArcGIS Desktop?

Is there a way to calculate a sorted field with sequential numbers? I have seen Sorting feature class to calculate sequential ID field using ArcGIS Field Calculator? that outlines how to calculate ...
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  • 29.2k
37 votes
6 answers
40k views

Difference between map layer and spatial dataset (e.g. feature class, shapefile)?

What is the difference between a feature class and a feature layer? To me they seem very similar in concept.
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  • 1,327
7 votes
5 answers
20k views

Converting LiDAR data to raster (DEM/DSM) for ArcGIS input?

I was wondering if there is an option to convert LiDAR data (.las) to a raster/grid (DEM/DSM) format that ArcGIS 10.0 can read?
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  • 79
6 votes
4 answers
6k views

Checking if polygon fits inside another polygon using ArcGIS Desktop?

How do I check if one polygon fits inside another polygon? Furthermore how do I automatically check if one polygon fits in other polygons of my shapefile? I have a shapefile with thousands of ...
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  • 71
4 votes
5 answers
8k views

Creating polygon feature class from area in one not covered by another using ArcGIS Desktop?

I am working on a project doing spatial analysis at a statewide level. I am looking at a form of transportation coverage in a state, and part of my analysis involves buffers and drive time polygons. I ...
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30 votes
5 answers
72k views

Converting ArcGIS layer style to Styled Layer Descriptor (SLD) file?

I am putting together a GIS server using GeoServer and need some help with importing my layer styles from ArcGIS 10 to SLD format. I have one layer in ArcMap properly symbolized and labeled, how ...
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  • 2,089
9 votes
2 answers
20k views

Sorting feature class to calculate sequential ID field using ArcGIS Field Calculator?

I am in ArcMap and I want to sort the records based on a field and then do a Calculate Field with an auto-incrementing value with the sort in-place. Any ideas? It looks like I could get an update ...
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  • 3,390
65 votes
5 answers
46k views

Building effective heat-maps?

Using ArcGIS, QGIS, Grass, and/or GVSIG: What are some of the tools and processes involved in building effective heat maps? What are the plugins involved? What are the major data requirements? What ...
29 votes
3 answers
11k views

Dividing polygon into specific sizes using ArcGIS Desktop?

I have several thousand irregularly shaped polygons in a shapefile. I want to be able to split each polygon into three areas, and to specify what the size of those areas (they sum to the previous ...
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  • 15.9k
7 votes
2 answers
4k views

Does Calculate Value (Model Only Tool) work correctly in tools run in Batch?

Am I correct that if my model has a model-only tool (Calculate Value), and then I run the model as a batched process, it will not run the Calculate Value expression? I wrote a model to upload, ...
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12 votes
1 answer
1k views

Displaying images next to features in ArcMap?

I have a series of point features which represent road signs and each point has one photo of each sign associated with it. I want to create a mapbook with the locations of the signs shown as points ...
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  • 207
40 votes
15 answers
114k views

Converting MapInfo TAB and/or MIF to SHP using free tools or ArcGIS for Desktop core product?

How do I convert MapInfo TAB and/or MIF files to SHP using only free tools or ArcGIS itself? I've not had much luck trying to do this in the past and I don't want to have to shell out for the ArcGIS ...
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19 votes
3 answers
105k views

Basic If/Then in Python Parser of ArcGIS Field Calculator?

I am using ArcGIS 10.2 for Desktop, and I've been looking through this site, and can't seem to figure out my answer yet. Very new to VBA and Python, but lots of years with ArcGIS. I know I can do ...
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  • 613
16 votes
3 answers
9k views

Cartographic techniques for symbolizing routing data [closed]

Some common problems with displaying routes created from street data, such as bus routes, include: Routes may overlap themselves, such as when a route takes the same road in opposite directions ...
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  • 35.4k
8 votes
3 answers
23k views

Auto-incrementing field in feature class using ArcGIS Desktop?

So I'm relatively new to ArcGIS and ArcCatalog. I have created a field name of PROJECTID in a feature class in a Personal Geodatabase. The data type is TEXT. This will be a ten digit ID. The first ...
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  • 307
6 votes
6 answers
24k views

Deleting polygon defined area from raster layer in ArcGIS Desktop?

Which tool do I use in ArcGIS 10.1 for Desktop to exclude areas covered by vector polygon layers from a raster layer? I want to keep portions of the raster layers that exclude the portions covered ...
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  • 61
39 votes
4 answers
9k views

Using directional shading on boundaries for cartographic effect in ArcGIS Desktop?

The attached screenshot of a National Geographic map shows some beautiful directional shading of boundaries. I'm trying to reproduce this sort of shading for a burn perimeter map, as I want to ...
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  • 50.3k
19 votes
6 answers
20k views

How to randomly subset X% of selected points?

What methods are available in ArcGIS 10.2 to randomly subset a selection of points. For example, in the attached screenshot I am interested in keeping 20% of the selected points and deleting the rest....
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  • 50.3k
17 votes
8 answers
22k views

Creating convex hull in ArcGIS Desktop?

I would like to be able to create a convex hull in ArcGIS Desktop 9.x, but I cannot find an appropriate tool. How does one go about creating one? I am interested in answers for all license levels: ...
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13 votes
2 answers
30k views

Maximum length of text fields in shapefile and geodatabase formats?

The maximum text string for a field in a geodatabase is 320 characters. The data I am importing has long character strings and it seems to be truncating when I convert into shapefile at the max ...
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  • 155
10 votes
7 answers
22k views

Fixing corrupt shapefile?

I have a shapefile that I was working on in ArcGIS Desktop 9.3 get corrupted somehow and it gives me the error "Number of shapes does not match the number of table records.". What I would want is to ...
user avatar
  • 873
9 votes
0 answers
7k views

Splitting feature class by unique values for an attribute/field in ArcGIS for Desktop? [duplicate]

I would like to split a single shapefile into multiple shapefiles by using unique values for one attribute/field to select features for each value out into a new feature class. I found ET Geowizard ...
user avatar
  • 5,777
44 votes
5 answers
24k views

Calculating average width of polygon? [closed]

I'm interested in examining the average width of a polygon that represents the road surface. I also have the road centerline as a vector (which is sometimes not exactly in the center). In this example,...
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  • 15.9k
16 votes
2 answers
4k views

Ortho Projection produces artifacts

I`m trying to create a sphere-like view using qgis and the "world from space"-projection http://spatialreference.org/ref/sr-org/6980/ (essentialy an ortho-projection). ArcGIS wraps the shapes ...
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17 votes
6 answers
21k views

Preparing CSV files for use in ArcGIS Desktop?

How do I prepare CSV files for use in ArcGIS Desktop. I ask because I have some troubles using CSV files because ArcGIS attributes wrong field types to my columns and also misinterprets special ...
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  • 1,391
5 votes
3 answers
9k views

Iterate through multiple Raster files and compute statistics using Zonal Statistics

I have a large number of raster images. What I'd like to do is to compute statistics on different sections of these raster files using a polygon. I think everyone is suggesting Zonal statistics. ...
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6 votes
5 answers
18k views

Varying transparency of symbols within single layer in ArcMap

I have a polygon layer which I am drawing in ArcMap using a graduated color symbology: Is it possible to vary the transparency between the classes, so that the transparency tapers off with the color ...
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  • 20.5k
36 votes
5 answers
127k views

Extract Raster Value into Polygon Attribute

I have Raster Data for a State which has Elevation Data in its pixels. I also have Vector layer which has the 300 divisions of State. what I need is, I want to get the average elevation value of ...
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  • 725
12 votes
2 answers
4k views

What is the source of horizontal and vertical striping in USGS DEMs?

When processing 30m and 10m DEM data downloaded through the National Map Viewer from the National Elevation Dataset, we noticed horizontal and vertical striping not only in the produced results, but ...
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  • 2,010
22 votes
3 answers
13k views

Performing Raster Noise Reduction and Edge Smoothing?

I have a raster image like this I want to delete the isolated noise point and smooth the edge (say the white single points, and I want the edges of the entity look smooth). How can I do this in ...
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  • 2,195
1 vote
2 answers
462 views

Using ArcGIS Field Calculator to create classes in new field?

I first classified firstCol into groups and then I want to give the groups with different weighted values in another field, SecondCol. I will need to give different weighted values very often. I find ...
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  • 141
9 votes
1 answer
4k views

Symbolizing using RGB values from Excel in ArcGIS Desktop?

I have an excel file with 2 attribute columns, 1-feature info 2-Number of color (RGB) that the current feature should be symbolize. This file file can be joined with the layer using the "feature info" ...
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8 votes
4 answers
17k views

Automatically update field value in one column based on change to another column in same table?

When editing I want to be able to change the attributes of one field and upon doing this allow for the automatic update of another field in the same attribute table. Essentially I have one layer ...
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7 votes
1 answer
787 views

Buffering point with different distance toward N, E, S, W using ArcGIS for Desktop?

I want to create buffer polygon(with curved edges) from points like this using ArcGIS for Desktop. distance toward North from a point 5, toward South 1.5, toward west 1, toward East 2. all this ...
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2 votes
1 answer
1k views

Splitting all polygon features in a shapefile into smaller equal width polygons

I have a shapefile of thousands of polygon features, that i would like to break up into smaller pieces (i.e. break a square into 8 equal pieces). I have read all over these boards for the right ...
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  • 21
43 votes
7 answers
38k views

Choosing File Geodatabase (*.gdb), Personal Geodatabase (*.mdb) or shapefile format?

Previously, I have used geodatabases as an easy way to keep all files together rather than having dozens of shapefiles all over the place, and it is easier when finally exporting all the relevant data ...
38 votes
21 answers
34k 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-...
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  • 9,321
34 votes
13 answers
100k views

Getting boundary of raster image as polygon in ArcMap

I have a rectangular raster image in ArcMap. How can I produce a polygon which is just the extent of the raster image? That is, I want to have a polygon layer with a single quadrilateral which is the ...
user avatar
  • 3,866
26 votes
3 answers
4k views

Packing Polygons within polygon using ArcGIS Desktop?

I have a Boolean raster. In the grey areas of the raster I would like to fit a given size polygon within a contiguous extent. Basically, I have an irregular polygon, and i would like to "fit" a ...
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  • 925

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