7
votes
1answer
24k views

How to change the unit of measure from degrees to meters in QGIS?

I am running QGIS 1.7.0 on windows, and I donwloaded a shapefile of census block group boundaries from TIGER. This file appears to be in the WGS 84 coordinate system, and when I open it in QGIS the ...
5
votes
5answers
4k views

ExecutING SQL script in ArcGIS field calculator?

I am trying to transfer over row data from a table to columns in a shapefile table. There is a common "SA" variable between the two (i.e. the study area number) but there is more than one land use ...
5
votes
2answers
1k views

Which is the best way to store roads for the shortest path finding application?

I would like my application which is simply a shortest path finder in a city to meet the following requirements: the city roads network should be stored persistently on disk and loaded into memory ...
7
votes
1answer
940 views

How to create a 9.3 file geodatabase with ArcObjects SDK for ArcGIS 10?

In ArcGIS 10 I could use the Create File GDB geoprocessing tool to create a 9.3 file geodatabase or the Create Personal GDB geoprocessing tool to create a 9.3 personal geodatabase. But I cant't find a ...
1
vote
1answer
1k views

ArcGIS Server 10 and SQL Server 2008 R2 permissions and feature services

I have ArcGIS Server 10 with SP1 and SP2 on windows server 2008 and ArcSDE (from an edn liscense) installed on top of MS SQL Server 2008. When I make a spatial db connection in ArcCatalog (direct ...
4
votes
2answers
2k views

Kicking someone off a shapefile in ArcMap

I have ArcMap open, and someone else has the same shapefile open as me. How can I kick them off so that I can edit? I get the following error message: "Unable to save edits, cannot acquire a lock"
7
votes
1answer
506 views

Is the software used in the “seabed UFO” video GIS software? If so, what is it?

The icons almost make it look like the software is ArcReader or an ArcEngine based, but it's hard to tell from the video. I supposed it could not be GIS software at all. Is anyone familiar with this ...
6
votes
2answers
2k views

US Tiger or Open Street Map Route Data: One Way Street & Intersection Data

We're building a U.S. street routing application (finding paths for cars between two or more locations using public roads) and would like to use open source data US Tiger Data or Open Street Map or ...
4
votes
2answers
2k views

How to “calculate” distance-to-ground of all 18 OSM zoom levels?

Assuming I'm building a 3D solution with the "world" being mapped to global geo-data supplied by OSM / Cloudmade... think http://www.webglearth.com but with completely different goals and use-cases. ...
18
votes
7answers
3k views

How to migrate data from ArcSDE to PostGIS?

Its been suggested that i ask this question again, but perhaps worded differently than how to Bulk load multiple shapefiles into PostGIS. I'm new to postgis and sql but i want to use postgis as a ...
8
votes
3answers
11k views

Filling in Donut Polygons using ArcGIS for Desktop?

I have a set of polygons that represent bodies of water. In the same feature are polygons that are the islands in the body of water. So for a given lake, there are smaller polygons within that ...
1
vote
0answers
161 views

ArcGIS Mobile projects access from Field device

I am trying to figure out how to allow field users to connect to ArcGIS Server based mobile services within an enterprise environment. As part of this, I am asking network security to allow this ...
2
votes
1answer
392 views

FlexViewer 2.1 - Add scroll for widgetgroup

I have a site that is using the ArcGIS Viewer for Flex version 2.1. In the header I have a widget group that contains 25 items. The list is so long that it goes beyond the bottom of the browser ...
0
votes
1answer
1k views

Remove non-alphanumeric characters from a string in Mapbasic

I have a user-entered string which I am using as a search term. I would like to display the results in a table named "SearchResults_"+SearchString. However the string could feasibly contain characters ...
5
votes
2answers
1k views

Practical way of managing polygons and unions of them

I have a table in PostGIS with a quite fine partition of a region, which I'd like to dissolve at two higher levels by means of two foreign keys (e.g. municipality and state). The partition is a real ...
17
votes
3answers
13k views

Free tool to convert ArcGIS layer package (*.lpk) to shapefile (*.shp)?

I have received a *.lpk file from Esri's ArcGIS platform that I would like to convert to a shapefile. How can I do this, using only free software?
7
votes
4answers
8k views

Create a Layer in GeoServer using REST

As part of a possible solution to this question i want create a layer in GeoServer via REST that supplies a SQL statement along with a userid. Reading I think i would create a feature type and ...
2
votes
2answers
633 views

GeoServer WFS Row Level Security?

I'm trying to implement row level security with GeoServer. I know out of the box it supports service, layer and REST security and not row level. However I'm sure there must be a work around. Has ...
9
votes
1answer
9k views

Looking for ZIP+4 boundaries

I know where to find 5-digit ZIP code boundaries. Do 9-digit ZIP code boundaries exist? If so, where might I find them?
3
votes
1answer
468 views

How to programmatically access an Add-ins image?

From this thread: Can you programmatically change the button image for a ESRI.ArcGIS.Desktop.AddIns.Button? I've learned to change a command image programmatically, but... how can I programmatically ...
3
votes
0answers
175 views

Should the IRelationalOperator.Equals return true regardless of vertex orientation?

I don't recall every having an issue with this method, but I am now. As I understand IRelationalOperator.Equals, vertex orientation shouldn't affect equality and if I take a polyline and reverse ...
1
vote
1answer
61 views

Can I change a bunch of address points to labeled points without having to do each one separately?

Hi I am trying to make a map with all of our customers in a certain area, I got the addresses on the map so now i have 300 dots. I was wondering if there is a way to make those labeled points without ...
7
votes
2answers
3k views

How to calculate perimeter of polygons in Quantum GIS?

Is there a way to calculate perimeter of polygons with the field calculator of qgis, like there is for area calculation?
2
votes
3answers
2k views

How to find most common classification within buffers?

I have a point shapefile that identifies the location of incinerators in England and an output area classification shapefile. I have created a buffer for all the points in the shapefile because i ...
0
votes
4answers
523 views

In ArcMap, can polygon labels always be displayed in a fixed area of the screen?

If I'm inside an area, I want its properties to be displayed in a fixed area of the screen (top right, let's say). I am talking about data view, and what I mean is that if I'm zooming into a city, ...
3
votes
1answer
457 views

Open dataset(s) with centroids or other geometry for WOEIDs?

The Yahoo! GeoPlanet data is available for download but this data only includes the object hierarchies without any associated geometry. Do anyone know if there is an open source for geometry ...
7
votes
4answers
3k views

ArcGIS Server 10 Rest Admin login

I am trying to login to the http://myserver/arcgis/rest/admin page and when I log in with credentials I get no error message but I am returned to the same login page. If I put in bad credentials I ...
7
votes
2answers
2k views

DXF attribute to z value

We have been given a DXF that contains a Elevation attribute but we would like to generate a 3D DXF. I know I can generate a 3D dxf from a shapefile using: ogr2ogr -f "DXF" out.dxf in.shp -zfield ...
1
vote
0answers
175 views

How to use wglUseFontBitmaps in ArcGlobe?

Does anyone have any experience using, wglUseFontBitmaps in ArcGlobe. It seems no matter what I do, the text doesn't show up on the globe. Here's my code. This is the same way that I've plotted ...
9
votes
2answers
8k 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 ...
2
votes
1answer
213 views

Get Cell Value Webservice for ArcGIS Raster (LiDAR) without using ArcGIS

I want to expose the getCellValue function on Lidar Data, as a web service. But I don't have access to ArcGIS (server or desktop). What options do I have to fetch cell value, given lat lon, from a ...
1
vote
3answers
5k views

Convert Lambert Conformal Conic to WGS84

I am trying to convert my "Lambert Conformal Conic map with 2 standard parallels" to the basic/standard WGS84 projection that Google Maps use. I have 30 of these maps which I need to convert. They ...
2
votes
0answers
639 views

Intersect two layers and get resulting features

I have X layers on a map and I need to intersect chosen layers (two per time) and color resulting features. I'm trying to get this code working // get first feature (index 0) ...
12
votes
4answers
638 views

How is margin of error reported on a map?

When reporting estimates you should always include the margin of error. There are conventional ways of reporting margin of error in a table, text or graph. But, how do you report margin of error for ...
7
votes
3answers
13k views

Draw a point with ArcGIS Javascript API

I am currently trying to draw a point with the ArcGIS Javascript API. Pretty much like this example, http://help.arcgis.com/en/webapi/javascript/arcgis/demos/toolbar/toolbar_draw.html, except the ...
12
votes
2answers
598 views

How to clean such a bad shapefile for routing ?

I am trying to clean a shapefile to make it usable for routing with pgrouting, postgis, postgresql. Here an intersection, it seems to be connected but when we zoom …. It is not: Same here : ...
2
votes
1answer
175 views

Arcobjects - Make new folder

Does anybody know how to create a new folder with arcobjects? This is what I want to do: insert a text in a TextBox and, when I run the aplication, it will create a folder with the name wroten in the ...
2
votes
1answer
2k views

ArcGIS Server js api - buffer query against polygons and not points

I'm using the below sample and i want to change the queried results from points to polygons http://help.arcgis.com/en/webapi/jav...ry_buffer.html Probably very simple but cant get my head around ...
5
votes
1answer
634 views

Memory leak in ArcGIS aggregate points/buffer/Addfield/cursor?

There are concerns about the ability of ArcGIS 10 to fulfill a requisite of mine. ET Geowizards has been tried, although it doesn't have the same capability of ArcGIS e.g. I cannot aggregate all of ...
1
vote
2answers
2k views

Getting All Paired Shortest Paths in ArcGIS network analysis at once?

I have some difficulties on network analysis,I want to run shortest path algorithm, I don't know how to use ArcGIS to reveal the shortest route between the appointed points on the map, and if it's ...
2
votes
1answer
800 views

Postgis: WGS84 Lat Lon Point to Gauss-Kruger 3

How do I convert a WGS84 lat lon point in postgis to Guass Kruger 3 (31467)? Somehow, I do not seem to get it right. I tried the usual way for converting projections: ...
6
votes
2answers
1k views

How to read data from PostGIS in DotNet (VB.Net/C#)

I have stored my data in PostGIS (PostgrSQL). Now I want to read the data in DotNet ArcEngine Application using VB.NET/C#. Anyone know how to read the data from PostGIS in .Net? Regards
6
votes
2answers
3k views

Measuring distance between points in ArcMap - what coordinate system to use?

This is a basic -newbie - question. I have some handwritten data points taken off a GPS - so I am assuming they are in WGS 84, and I want to load them in ArcMap 9.3, via excel, and measure the ...
4
votes
1answer
6k views

Converting *.lyr file to shapefile or raster using ArcPy?

I am using ArcGIS Desktop 10 and Python 2.6.5. i have created a "test.lyr" file, now i want to convert it either to shape file or raster file. i have created the "test.lyr" from "test0.tif" and added ...
5
votes
3answers
541 views

Calculating order of points along a line

I have a shape file with transportation lines and another file with all bus stops along each line (with an attribute which links stops with specific lines to which they belong). I need to calculate ...
4
votes
2answers
4k views

How to find polygons within polygon using ArcGIS Desktop?

I am new to GIS and ArcGIS. I have a problem I need to solve: I have a set of polygons, some of which enclose other polygons. They are lake polygons, and within lake polygons, are smaller island ...
39
votes
10answers
56k views

Why does GPS positioning require four satellites?

I have a question on the GPS positioning algorithm. In all books I've read for 3D positioning we need four satellites, and I don't understand why. We need to calculate three variables: x, y, z. We ...
3
votes
1answer
307 views

How to map our data with Google Map data

I want to add all the bus route data and create a route finding app for my country since Google map has no data about bus routes in my country but with JavaScript API i could get the shortest path ...
5
votes
0answers
857 views

How to find layer ID and name from Identify query using ArcGIS Web ADF?

I need to retrieve the layer ID of every layer returned by the IQueryFunctionality.Identify function (I am using ADF with .NET) Identify function spits out a DataTable array for layers which have ...
3
votes
1answer
2k views

Georeferencing with Quantum GIS and reprojecting to EPSG:900913

I'm trying to reproject a map to EPSG:900913 The image I'm reprojecting is the following http://i.imgur.com/HmfLW.png I'm using the cities as reference points obtaining the coordinates from Google ...

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