All Questions

2
votes
0answers
643 views

Rendering raster layer from DTED based on height color map

I have a raster layer that was create from DTED file (dt1 specifically), created by the following code: var rasterLayer = new RasterLayer(); rasterLayer.CreateFromFilePath(dtedFilePath); The dted ...
2
votes
1answer
503 views

Is it possible to add custom SQL-based layers in GeoServer?

I would like to add a layer to GeoServer that builds its features from an SQL query executed against a PostGIS database (something like a PostGIS layer in QGIS, but customized with additional SQL ...
2
votes
5answers
4k views

Convert geographic coordinates to UTM zone 29N with Javascript

I have an issue converting lat longs to UTM with the ArcGIS javscript API. Lets say that I have a map, based on the UTM zone 29N, also known as WKID 32629. I have a known set of coordinates from a ...
4
votes
1answer
177 views

Why does a cache service need to load first when a dynamic service is involved?

I notice if you have 2 services 1 cached and 1 dynamic you have to load the cache first for it to display. Does anyone know why?
4
votes
3answers
4k views

50k Mexico Topo Maps Sources?

Anyone know of another source (preferably free) for these 50k Mexico Topo Maps other than www.omnimap and www.eastview? There is a free WMS that has them but only for UTM 15 and 16 here: http://...
8
votes
3answers
6k views

Setting parameters in Script Tool using Python?

I hate to bug you all with the same problem over and over again but I run into a new problem everytime I make a slight change to the code. All I did to the code below was to replace field names to ...
6
votes
2answers
2k views

Why does GeoServer/OpenLayers show only points from my PostGIS?

I am reading the PostGIS in Action book now and I have a problem with one example: I have created a table: CREATE TABLE my_geometries (id serial NOT NULL PRIMARY KEY, name varchar(20)); I have ...
2
votes
1answer
147 views

Optimal placement of a shape on a polygon layer based on an attribute

I am using ArcGIS and I have a layer of polygons that has an attribute. I would like to overlay a circle (or other shapes in theory) of a specified size such that it would encompass the maximum amount ...
3
votes
3answers
5k views

What Geotransformation (NAD27 to WGS84) to use for Gulf of Mexico?

I'm working with datasets that are spread out across the northern part of the Gulf of Mexico, stored in NAD 27. I've been told the polygons shown above were obtained from BOEMRE (formerly known as ...
43
votes
13answers
33k views

Converting ArcGIS Server JSON to GeoJSON?

I'm creating a web map using Leaflet, and I want to be able to grab feature layers from our ArcServer. I have successfully been able to retrieve a feature class as JSON, but Esri's JSON objects don't ...
7
votes
1answer
611 views

What does pgRouting's architecture look like?

I know that pgRouting is a pretty nice tool, but I would like to use something of my own in my application, mainly because I don't know C and I don't know how to tweak the performance of pgRouting. ...
1
vote
1answer
902 views

How to segmentize/sample a LineString using geodjango (postgis/geos) and/or openlayers?

I'm trying to sample points along a linestring. The goal is to have the distance between 2 consecutive points to be at most X (eg. 50m). I'm drawing linestring in openlayers and sending it to a ...
11
votes
2answers
47k views

Changing 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
5k 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
2k 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 on ...
7
votes
1answer
1k 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 ...
2
votes
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
4k 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
618 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 ...
8
votes
2answers
3k 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
3k 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. ...
19
votes
7answers
5k views

Migrating 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 ...
10
votes
3answers
19k 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
167 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
400 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
2k views

Removing non-alphanumeric characters from 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
2k 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 ...
21
votes
4answers
33k 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?
15
votes
5answers
19k 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
930 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 ...
12
votes
4answers
21k 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
564 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
199 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
64 views

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

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 labelled 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
3answers
550 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
517 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 ...
10
votes
2answers
3k 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
192 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 ...
13
votes
4answers
23k 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
232 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 ...
2
votes
3answers
9k 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 ...
3
votes
0answers
746 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) ESRI.ArcGIS.ADF.Web....
14
votes
4answers
1k 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
17k 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 ...
16
votes
2answers
753 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 : Here ...
2
votes
1answer
193 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 can't get my head around ...

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