7
votes
1answer
946 views

Should I split MultiPolygons into Polygons?

In the system I'm implementing I have a table T1 with an associated geometry. Most of the geometries are a set of n polygons, with 10 < n < 100. At the moment in the table T1 I have a geometry ...
1
vote
1answer
578 views

ArcGIS for Windows Phone with Bing maps and shape files

I have a set of shape files that I want to display on a map along with satellite imagery. I currently use ThinkGeo for this sort of thing on Windows. I'm writing a Windows Phone app that must ...
2
votes
1answer
1k views

sharpmap overlay mapinfo on bing/google

I want to use sharpmap to overlay a mapinfo tab file onto google or bing. I have it working pretty much at the moment however the co-ordinates that bing/google show are in correct so my mapinfo file ...
9
votes
1answer
824 views

Large Scale Geocoding and Processing in ESRI

Ok, so I guess this kind of a informal query/survey about how big a datasets you are using in your ESRI worlds... I am building and maintaining a statewide dataset, where I have to process down to the ...
15
votes
4answers
756 views

Why do valid polygons repeat the same start and end point?

In the GIS world, for most modern formats and Standards (e.g., Shapefiles, WKB/WKT, GML, KML, etc.), valid polygons need to have closed linear rings, which is a linestring of coordinates where the ...
3
votes
1answer
1k views

File IMG from OSM

Is it possible to convert or open an IMG file from OSM? I don't find a solution for the visualization and conversion. Thanks
9
votes
1answer
2k views

How to create sidebar help information for Python script tools of ArcGIS Desktop?

I have been creating custom tools (Python script tools) using Python with the ArcPy module. I can set up the tool successfully with parameters and all, but I cannot figure out how to create help ...
1
vote
2answers
1k views

POI Datasets for North America

I use foursquare because it contains a lot of POIs. Which database do you use when you need a point of interest in North America?
5
votes
1answer
507 views

.NET And ArcGIS 10x - Where have all the wrappers gone?

With prior versions (to ArcGIS 10x) of ArcGIS, the .NET wrappers used to be placed in a dotnet directory. Where are they located with 10x? With prior versions, I used the absence or presence of this ...
5
votes
2answers
620 views

BBOX and Projections of WMS services in Geoserver

we have tried to overlay a raster layer on Google map and have some difficulties to align the raster images onto the base map. When it is on the overview (Zoom level 1), it looks like this: On a ...
4
votes
1answer
301 views

Facebook Place Api

Do you know if there are a requirements or restriction on Facebook Place API? Is it possible to download the data? Is it open-source?
3
votes
1answer
1k views

How do you make a SQL join query for a NULL in a search cursor in ArcPy?

I am trying to learn how to do some error catching/avoiding in ArcPy. Here is a simplified version of what I would like to do. I would like to take some points, and then check to see if there is a ...
0
votes
3answers
2k views

Copying objects to existing records in MapInfo

This should be fairly simple but I think I'm missing something... I have two tables of similar structure with corresponding data in them (i.e. same number of rows, rows have the same IDs). The main ...
0
votes
1answer
268 views

Why do Web ADF Map and MapResourceManager maintain their state in session this way?

I'm using ArcGIS Server Local datasource. ArcGIS Web ADF MapResourceManager control maintains resources added once until session is abandoned. Why does it do so? Why not just use viewstate? Map ...
7
votes
1answer
716 views

How does one calculate an angle in a geographic coordinate system?

Given three points on a line in a geographic coordinate system, how does one calculate the angle formed by these three points? Please, give a general solution but also include system specific ...
2
votes
3answers
374 views

Esri Web side and Silverlight

I am experienced on Esri gis desktop and engine development.But i want to learn about the web side.Where should i start ? There is noone to teach me where to start.Is it as difficult as desktop and ...
4
votes
2answers
275 views

How can I make my data efficient and “light” to do 3D Visualizations in Google Earth?

As a test run, I'd like to visualize population on census blocks for a few states (New England for example). I assume that the kml to do this will be huge, when you factor in the census boundaries and ...
3
votes
1answer
719 views

Convert from shapefile to GPX with selected attributes

I have a points shapefile that originally came from a GPX file (imported using QGIS). The original GPX file contained waypoints only and has disappeared. The shapefile has many attributes, but only ...
2
votes
3answers
1k views

Convert Arcgis Rest to OpenLayers Vector

i am working with openlayers and esri rest services... in my api due to esriGeometryPolygon for all city , rendering map is taking lots of time ..there for i dont take a good result.. first of all is ...
2
votes
1answer
233 views

Geocoding advice by using Arcgis

Hello everyone i have an administrative unit feature dataset (polygons) with 3 levels: Admin 1 - Province, Admin 2 - District and Admin 3 - Commune. Now i want to make a geocoding process of an ...
2
votes
4answers
527 views

Extraction of monthly image from two-16 day images

I need to conbine two-16 day NDVI image into monthly NDVI image. To do this, what kind of function and formula are used in ENVI, ARCGIS or ERDAS? Best regards,
37
votes
7answers
4k views

Best practices for PostGIS production environments?

What PostGIS documentation have you come across that has been helpful when tuning PostGIS for a production environment? I would like to get together with my DBA to setup a Postgresql/PostGIS ...
0
votes
1answer
381 views

Calculating length with Python and the PYTHON_9.3

(Please critic wholly if possible) If I have polyline data in NAD83 and I want to calculate geometry using the PYTHON_9.3 parameter from the arcgisscripting.create(9.3), I am getting mixed results. If ...
1
vote
1answer
986 views

Using C# + Mapcript + Openlayers

Nowadays i'm using Mapscript and C# to generate and display a Mapfile, but in this way i need to create manualy the interface, is there any way to use Mapscript + Openlayers?
2
votes
1answer
759 views

How to provide transform information to openlayers on Image layer

I would like to include an overlay raster layer into my OpenLayers map. I've pre-transformed the image into the correct projection (EPSG:900913) and saved as a png using the gdal_translate command: ...
3
votes
1answer
740 views

How to Solve the error - “Python Plugin is Broken”?

I tried following the steps to build a python plugin for QGIS. (step 3 is where I am stuck at) 1) I used the Plugin Builder plugin to build the initial set of files. I call my plugin ...
3
votes
2answers
231 views

How can I load .SID files in ArcEngine?

How can I load .SID files in ArcEngine? I think its possible, but I can't find any links. With Kirk's help I got it here's the code: public void add_SID_file(string dir) { ...
6
votes
1answer
720 views

Creating columns in PostGIS using osm2pgsql hstore tags

While I feel this may come down to a database question, it feels GIS-related enough that I feel comfortable posting it here. I'll be happy to take it elsewhere if it belongs there, though! I've ...
4
votes
0answers
942 views

FeatureLayer SaveEdits failing

I've created a layer which I have bound a DataFeatureForm. Everything is working hunky dory, up to the point where I try to call the layers SaveEdits method in the EditEnded event. When I call this ...
8
votes
3answers
753 views

Longitudinal Issues with NetCDF data

I am seeking advice on working with world data sets where the GCS has a positive range (0 degrees to 360 degrees). The data I am working with are NetCDF oceanographic data and have positive coordinate ...
4
votes
2answers
928 views

Comparing two featureclasses using C#

I'm sorry, I know this is a pretty simple question but am having trouble getting this to work. Basically, I have 2 linear featureclasses and they both have the same fields and spatial reference. FC1 ...
5
votes
3answers
2k views

resize image resolution from 1000 m to 250 m

I'm beginner of ARCGIS and RS. I have many problems with the procedure. One of them is I have NDVI images and Soil map. Both are at the different resolution: NDVI is 250 m. soil map is 1000 m. So I ...
10
votes
7answers
10k views

Where can I find a shapefile of city boundaries in the US?

Where can I find a shapefile that contains boundaries for the major cities in the United States? I have tried the census website but could not find anything.
8
votes
6answers
17k views

ERROR 000212: Cannot create XY event source Failed to execute (MakeXYEventLayer)?

I have a csv file that is 133mb in size and has over 1.3 million lines of data. Each line of data has its own lat/long and I was wondering what would be the best way to display those points based off ...
2
votes
1answer
1k views

How do I change a text box to a text area? (ArcGIS API for JavaScript)

I recently posted this question on the Esri forums and thought I'd give stack exchange a try too. I'd like to take this sample: ...
8
votes
2answers
678 views

Why do I need ArcGIS Server just to host ArcObjects in a web service?

I get this question a lot from web developers, and would like to have a short concise answer for them ... Why do I need ArcGIS Server just to host ArcObjects in a web service?
1
vote
1answer
300 views

How to get a composition name in Qgis python console?

In Qgis python console: I want to populate a list with compositions names, like in Composer Manager, but I can't figure out how to get the names (titles). So far: composerlist = ...
2
votes
0answers
472 views

Why can't an “AI export” from ArcGIS 10 be opened in CorelDRAW X5?

It doesn't matter whether the .ai file is 1.5GB or 5MB, whether it's complex or simple; I always get the "The file cannot be opened." critical error. I use CorelDRAW X5 not Adobe Illustrator but ...
2
votes
1answer
1k views

GeoTools Dynamic Layer

I need to change the features of a MapLayer in real-time but I don't know how I can update/refresh/repaint the layer on the map without having to remove it and add it again (which creates flickering). ...
0
votes
1answer
141 views

OL application is at different production server than GeoServer

My OL ASP.Net web application is hosted at 172.24.100.16 production server (windows server 2008)whereas Geoserver is hosted at 172.24.100.15 production server (Linux, UBUNTU). When i access page from ...
6
votes
3answers
7k views

Converting X,Y coordinates to lat/long using pyproj and Proj.4 returns the wrong coordinates

I'm writing a python script that reads multiple XML files containing x and y coordinates and combines them all into a single csv file. Latitude and Longitude are required fields in the csv, but I am ...
5
votes
2answers
4k views

Directional Flow Arrows for sewer lines

I am working for the Town of Yadkinville, NC and would like to know how to create a layer of directional flow arrows for sewer lines to be able to turn them on and off at will?
14
votes
1answer
19k views

Programmatically creating a vector feature in OpenLayers

I want to create a vector feature, programmatically, on my map. It's supposed to be in the A4-paperformat, for showing a sort of print preview. I've created a control for handling this, but now I'm ...
8
votes
1answer
1k views

arcpy.geometry __geo_interface__ and AsShape() function: loss of precision and holes

I'm serializing my arcpy geometries as geojson so that I can 'hydrate' them back as geometries later and I'm having 2 problems in the cycle.: PROBLEM 1: Precision R0 = ...
3
votes
2answers
678 views

Generate cache tiles for EPSG:27700 for use with OpenSpace

I am using GeoServer 2.1.0 (windows jetty local install for dev), open layers and Ordnance Survey openspace api and have a set of shape data that I am using as an overlay. Everything is working as ...
1
vote
2answers
655 views

accessing mapinfo data without using mapinfo api

I need to be able to access various mapinfo layers but without using the mapinfo api. I have found that I can convert the mapinfo layers to an access database to get the attribution and I can use ...
2
votes
1answer
418 views

How can you make RasterToASCII_conversion observe environment setting output cell size?

I have two rasters (an ESRI grid and an IMAGINE image) that differ in projection, extent and cell size. I want to convert the IMAGINE to an ASCII, and want it to have the extent, cell size and ...
8
votes
3answers
2k views

How to create TINs in ArcGIS from triangular elements

I am working with FEM models with triangular elements, and I'd like to view the results as TIN surfaces in ArcGIS (and in ArcScene). In my external source, I have nodes (with X,Y,Z coords) and ...
3
votes
2answers
565 views

FME - Convert DWG to JPG

I am a beginner in Safe FME and i need to know how to Convert DWG files to JPG Files. Is it possible?
2
votes
2answers
2k views

ArcGIS Server Data Extraction - Job does not exist or is inaccessible

I have followed the documentation and video to set up a data extraction geoprocessing service, which I am accessing with the ArcGIS Viewer for Flex (v. 2.3.1). When I run the Extract Data widget in ...

15 30 50 per page