All Questions

5
votes
2answers
697 views

Segmentation Fault (segfault) when using OGR CreateField() in Python

Receiving a segfault when running this very short script in Ubuntu. from osgeo import ogr, osr shpfile = 'Census_County_TIGER00_IN.shp' def cust_field(field): '''cust_field(shpfile, field) ...
3
votes
2answers
3k views

Using Buffer Wizard in ModelBuilder?

I am creating a model in ArcMap 10 and I need to use the Buffer Wizard tool to create multiple buffers within a polygon feature class. The problem is, I can't seem to place the Buffer Wizard within my ...
3
votes
2answers
575 views

Modelling stream in 3D based on known depths across it using ArcGIS Desktop?

I have an excel spreadsheet that contains the elevations across the profile of a stream. I was wondering how to model this in 3-d. Basically there are 6 monitoring stations that are within a stream. ...
7
votes
6answers
8k views

How do I cluster XY point data? (ArcGIS 9.3)

I have a whole bunch of icons displaying on a map, I want these clustered together as was suggested to me for a different question here... ArcGIS 9.3. How do I increase Picture Marker Symbol ...
3
votes
2answers
314 views

Is it possible to sync the extents of two open mxds?

I've never seen it, and it's not vital, but I'm wondering if anyone knows of a way to sync the extents of two open mxds? I'm pulling an old ims service into one mxd, and have another mxd open that i ...
6
votes
0answers
268 views

How to set order of operations for Field Calculation in Network Analyst Evaluator Dialogue? [closed]

I desire to have a ratio calculated each time I create a new route. To get this ratio, I created and populated a field that multiplied the length of each segment by a designated number from 1-5, ...
1
vote
1answer
654 views

Balloon popup in dynamic display looks weird (with image link)

Here's how it looks when dynamic display is enabled http://iterationx.posterous.com/34293301 Each letter gets its own balloon callout - this is quite annoying and I can't image why anyone would ...
2
votes
1answer
586 views

Can I create a balloon callout on an address point on a published map?

Very new to this, so please excuse any ignorant question! I've created a vb.net app to open a published map in ArcReader. Have a few questions... First, I started with the query attribute sample ...
3
votes
1answer
177 views

What sample size should be used when applying the National Standard Spatial Data Accuracy (NSSDA)?

I'm less interested in what is recommended by FGDC, and more interested in information like this: SAMPLE SIZE AND CONFIDENCE WHEN APPLYING THE NSSDA, which suggests you need a sample of 100. Is there ...
1
vote
1answer
2k views

ArcGIS: Generate Random polygons within a polygon

I have a generic polygon layer, would it be difficult to do subdivide the polygon into sub polygons provided they're all relative of the same area? Let's say divide a polygon into 10 or so sub ...
27
votes
6answers
11k views

Dealing with data that spreads across UTM Zones?

I have data that spreads across two UTM Zones GDA/MGA94 UTM Zone 55 and 56. I have layers such as a cadastre, roads, pipelines etc where I want to store measurements like lengths and areas in metres ...
27
votes
5answers
51k 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 ...
15
votes
5answers
2k 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 ...
5
votes
1answer
2k views

ArcSDE - Registering table with Geography spatial column fails with error -138 (SQL Server 2008)

I have a table of point features I am trying to register with ArcSDE (9.3.1 on SQL Server 2008) using the following command: sdelayer -o register -l ThirdPartyWellsSurface,Shape -e np -C OBJECTID,SDE ...
2
votes
1answer
193 views

WGS1984 polygon labels incorrectly located in web mercator projection?

I have polygons for states/provinces (wgs1984). When I label these polygons in ArcGIS (web mercator) some of the labels occur in random locations. For example, texas might show up in southern canada, ...
2
votes
2answers
2k views

ArcGIS 9.3. How do I increase Picture Marker Symbol performance?

I have a layer with 400 point features that display a picture marker symbol on the map. We expect this number to increase a great deal. Unfortunately it's already noticeably slow. This is being ...
3
votes
2answers
1k views

Add-in; Failure to get code to execute when toolbar button pressed

I had written several VBA routines for ArcGIS up through v9.3 and have since upgraded to 10. Since VBA will be a thing of the past in the next version, I downloaded and installed VB Express 2008 and ...
22
votes
3answers
10k views

Seeking Generalisation Strategies for Building Outlines in PostGIS?

I have a dataset of building footprints vectorised from a raster dataset. The dataset is currently just a vector representation of the raster data. I would like a polygon dataset that only has ...
3
votes
1answer
259 views

esriFramework.appRef is null?

Trying to use the following code with an ArcGlobe Control Type t = Type.GetTypeFromProgID("esriFramework.AppRef"); System.Object obj = Activator.CreateInstance(t); Howevewr, t is coming back as ...
6
votes
9answers
12k views

ArcGIS: Create a line layer from a point layer and csv data file

UPDATED DECEMBER 20 I have a Regular point layer and a csv file that has the same ids as the point layer. The csv file is organized as ID From To Weight -- ---- -- ------ 01 ...
9
votes
6answers
7k views

Calculating orientation of each side of polygon using ArcPy?

I want to examine the orientation of each line in a polygon so that I can calculate their solar exposure. Each polygon represents a building, and has an associated height. For the moment, I just want ...
3
votes
2answers
3k views

How can I change the line width of the outline for polygons in the Mapfile?

I display Polygons in the UMN Mapserver. With the OUTLINE-keyword I set a color for the outline of the polygons. How can I change the line width of this outline?
4
votes
2answers
555 views

Has anyone successfully implemented a web service that sits on top of ArcSDE (SQL Server 2008)?

Here's the situation. We have planned point locations that lie within predefined polygonal project areas. Our IT department currently has these polygonal project areas in SQL Server 2008 as geography ...
17
votes
2answers
29k views

Controlling Image Output Settings in QGIS?

I am exporting a QGIS map to an image format. I would like to have control over the output settings of the image (dpi), as currently it is only exporting the images at 96 dpi. Does anyone know if ...
14
votes
4answers
6k views

Create Vector Tiles for Polymaps

Ok, likely my bad for not making it to WhereCamp5280 and asking the FortiusOne geeks directly, but what's the process for creating GeoJSON 'tiles' for use in Polymaps? The Population example over at ...
6
votes
1answer
309 views

How can I get more verbose messages from a GP service?

When I run a tool I've published as a gp service, the only messages I get are these: esriJobMessageTypeInformative: Submitted. esriJobMessageTypeInformative: Executing... ...
13
votes
0answers
813 views

Incorporating Length of Route Value into Cost Evaluator Function (ArcGIS Network Analyst)? [closed]

A friend and I (who more frequently than I posts on this board) are creating a walking network and we have run in to a snag. We would like to attribute a cost evaluator to our network dataset using a ...
2
votes
1answer
2k views

Making a layer read-only in arcgis 9.3.1

Is there a way to make a layer (a independent shapefile or a layer in a SDE gdb) read-only - so that people will be able to see it but not edit it? (I'm using 9.3.1)
27
votes
2answers
4k views

Benefits of Multipart Features?

Multipart points, lines, and polygons are implemented in nearly every GIS, but what benefits, if any, do they provide? In a relational database attributes shared by different features can be stored ...
5
votes
2answers
527 views

Summing attribute of feature in network along route using ArcGIS Network Analyst?

In the walking network that a friend and I are creating, we want to calculate an overall safety rating for each route. Each segment of our walking network has a certain safety value. We have ...
14
votes
5answers
10k views

Seeking ArcGIS Desktop tutorials?

I'm looking for a good way to learn more ArcGIS techniques than I came across in my undergraduate Geography degree to really use the power of the software. Browsing around and asking questions on ...
6
votes
1answer
722 views

Programming a Tessellation in MATLAB and Using Map Data As Input

First of all, I hope this question isn't too basic, obvious or inappropriate for this forum. I'm very new to using map data. I'm working on a project on locating service terminals in a geographic ...
5
votes
4answers
3k views

Event raised when selected layer changes in TOC

Is there an interface which exposes events for when a TOC selected item changes? I can find snippets showing how to get the currently selected feature from the TOC. However, I have not been able to ...
9
votes
9answers
11k views

Extract boundary from detailed layers in ArcGIS Desktop or QGIS?

Is it possible to return the boundary (outside) perimeter of a polygon layer? Let's say you have the map of the USA, for simplicity, broken down to the county level, is it possible to return the ...
11
votes
3answers
3k views

Spatio-temporal interpolation in R or ArcGIS?

I'm trying to calculate average rainfall value from a number of points using Inverse Weighted Distance tool in ArcGIS 9.3. My problem is that: each point has it own time series, therefore the ...
9
votes
1answer
10k views

How to provide automatic overview map in ArcGIS Desktop?

This is a slightly badly phrased question I know, but I'm not really sure what to call this. My supervisor recently showed me a printed out map that he had produced with a high-resolution satellite ...
8
votes
1answer
1k views

Books from Esri Press

Which books from Esri Press can you recommend?
53
votes
13answers
18k views

Seeking QGIS tutorials and web resources?

I wish to familiarize myself with the capabilities of QGIS up to and beyond QGIS version 3.0. Can you recommend some good web resources and tutorials that would show me QGIS' capabilities? I am ...
4
votes
2answers
4k views

One-to-Many table relate viewed through ArcGIS Server

I want to create a Table Relate with a one-to-many relationship between a layer and a non-spatial table based on a common field. My question is, if I publish this data to ArcGIS Server, will an ...
5
votes
2answers
159 views

Monitoring programmes

I am not sure if it is a right place to ask this one but let me try. Monitoring programmes are known for various targets and for various spatial levels. They may include regions, countries or even ...
4
votes
2answers
503 views

Misalignment when generating centroids with Qgis

I was wondering if anyone could shed a light on why this behavior is happening in QGIS ? I'm pretty confident that the issue here is not due to "centroids within polygon" Edit Added a detailed ...
2
votes
1answer
1k views

Network Analyst hierarchy routing issues. (ArcMap) [closed]

My friend and I have created a walking network. We created a network without a hierarchy evaluation and the routing worked fine, but when we added a hierarchy to the equation many routes won't solve. ...
3
votes
2answers
798 views

Setting Layer in the Georeferencing ToolBar in arcMap 10?

Does anyone out there knows how to set the layer in the georeferencing toolbar. There is no information in the object models. Using ICommandItem ic = ArcMap.Application.Document.CommandBars.Find(...
4
votes
0answers
3k views

The best GIS book! [duplicate]

Possible Duplicate: GIS Pros - what lives on your bookshelf? Which book do you think is best for GIS with theoretical bases?
6
votes
3answers
365 views

How could I switch data connections in case of server failover?

Here is the scenario. I want to be able to switch the end users database connections automatically in case we ever have to switch to our backup SDE server. My first thought was to set up sde ...
4
votes
4answers
17k views

Correcting a table's projection in MapInfo

Occasionally I have a MapInfo TAB file that doesn't match up with others. Presumably this is because MapInfo is interpreting it as a different projection to the one it was saved as. I am also assuming ...
15
votes
2answers
8k views

How to add custom Feature attributes to Shapefile using Python?

I am seeking a way to take an existing Shapefile that has a Feature set of 200 countries. Each country Feature has an attribute of "NAME." My objective is to create a Python script that adds an ...
30
votes
8answers
5k views

When is a 3D Visualisation in GIS Useful? [closed]

I can currently only think of two cases: to visualise potential changes in a landscape, such as the effect of adding windfarms, or the addition of a new building to an urban area. However both these ...
5
votes
1answer
322 views

GIS project advice

Hello: I have the following: Shapefile of the world with the boundaries of each country Successfully imported shapefile into PostGIS database Can display map of the world in a browser via Openlayers....
6
votes
1answer
1k views

Setting transparency in background colors of neatline fame?

Is there an easy way to set transparency levels in background colors of a neatline frame or any other frame for that matter in ArcGIS?

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