6
votes
2answers
4k views

How to extract road and building features from raster data?

I work with raster data and my task is to digitize a big image. This consumes much time just for digitizing roads and buildings! I'm looking for tools to simplify working on raster data to digitize ...
1
vote
0answers
406 views

Intersecting with Geodatabase.ISpatialFilter - no results

I'm trying to intersect two layers and get resulting features with the following code I've written: ESRI.ArcGIS.Geodatabase.ISpatialFilter spatialFilter = new ...
2
votes
4answers
3k views

Retrieving tiles in EPSG:4326 format. Is there a service for that like CloudMade?

Is there a service that can provide custom tiles in the EPSG:4326 projection? I've looked at Cloudmade and it would be the ideal solution but their tiles are using Spherical Mercator. Basically the ...
5
votes
3answers
3k views

What restrictions on KML/KMZ upload exist in Google Maps API v3?

I am currently using the google maps api v3 to load kml files into my web application. The file I am having trouble with is a KML which is 274 KB big. It will not load (uncompressed the file is ...
4
votes
0answers
131 views

Place recognition with WiFi [closed]

I'm looking for some algorithm able to better recognize the geometry place only exploiting wi-fi antennas. I read about place recognition is divided in two classes: geometry and fingerprint. I'm ...
2
votes
1answer
2k views

Issue with Mosaic to New Raster tool

I am having a major issue with the Mosaic to New Raster tool when importing ASC files. It processes the first few files but not all of them. I thought it was a space issue and tried to split the input ...
6
votes
1answer
129 views

Would it be possible to construct a stand-alone grass.script python package?

I would like to migrate dependency on ArcPy to grass.script without requiring the full installation of Grass. Would it be technically possible to have a portable directory containing grass.script and ...
5
votes
5answers
2k views

What kind of hardware configuration is needed for fast map services?

I have been trying to figure out the best way to have fast map services. So far i have done lot of changes on the process side like scale rendering, analysis, projections, SDE data layer indexing, ...
3
votes
2answers
326 views

GPS capable rangefinders or cameras that can capture lat / long data from a distance?

Anyone have experience using this technology? i.e. field verifications of structures where you need to capture the lat / long of a house that is 1000 feet from the road with limited access.
2
votes
2answers
4k views

How to Create Evenly Spaced Nodes/Lines or Set a Spacing Rule in Arc 10

I have written a Python script for ArcMap 10 that uses the x/y coords from a shapefile to create perpendicular transects to the existing line. Since these shapefiles are actually rivers the lines are ...
3
votes
2answers
771 views

ArcObjects: IMapEvents.FeatureClassChanged doesn't fire if the layer's previous data source was invalid

Is there any other event besides IMapEvents.FeatureClassChanged that will be fired when a layer's data source changes? FeatureClassChanged doesn't seem to fire if the layer's previous data source was ...
2
votes
1answer
1k views

Using a geodjango PointField with geography=True, my distance calculations are wrong

Here's my model: class ExchangeArea(models.Model): """ An Exchange Service Area, calculated from a phone exchange and surrounding census tracts. """ coordinates = ...
3
votes
2answers
3k views

Merge Error 000594 in ArcMap - falls outside of output geometry domains

I'm trying to merge together 5 different point feature classes into one using the Merge tool in ArcGIS desktop 10. It successfully merges 3 of them but not the other 2. It comes back with an error ...
1
vote
1answer
2k views

Trouble creating ArcSDE Connection File

I'm having trouble creating a ArcSDE Connection File. When I bring up the GP tool to do this, I enter the folder I was save the sde file to, enter an name for the file 'MySDEConnect.sde', enter the ...
2
votes
1answer
378 views

OpenLayers: failed to create a Ext.list that wraps a Openlayers.request.Get function

I am using Sencha Touch + OpenLayers to develop a demo app. One feature is to get the catalog of feature data in GeoServer. I want to use Ext.List to display the name of feature layers. I tried ...
3
votes
1answer
248 views

ESRI Flex API - Dealing With Graphics Layers in Polar Regions

I have developed a Flex app that incorporates a number of geo-processing functions. The Base Layer of this app is the standard ESRI World Imagery in Web Mercator coordinate space. One of these ...
2
votes
1answer
568 views

Arcobjects: Is my spatial reference Geographic or Projected?

I have the user select a coordinate system with the Spatial Reference Dialog. Is there a simple way to determine if the resulting spatial reference is a Projected or Geographic CS? I would of ...
3
votes
1answer
922 views

Postgis: Is there a way to do an intersection query based on lines while taking into account the dateline?

This is an exact copy of a question I asked on Stackoverflow a few weeks back and still haven't found a good answer for it. The original question is from here: original question. I've been searching ...
3
votes
4answers
2k views

Migration from postgresql 8.4 to postgresql 9.0, postgis 1.5 involved

Im migrating from 8.4 to 9.0, in pg8.4 i have postgis 1.5.1 and in 9.0 im just installed 1.5.2. I decided to dump the postgis databases before the pg_upgrade command, and delete them, planning to ...
1
vote
2answers
492 views

DBF write support in Ruby

this is repost of the same question on Stackoverflow where I got no answers so far http://stackoverflow.com/questions/5687130/how-to-write-into-dbase-tables-using-ruby-on-osx So, from OSX(Lion) using ...
2
votes
3answers
467 views

Is it possible to retrieve thematic layer information for a Layer in Mapbasic?

I found this code windowinfo(FrontWindow(), WIN_INFO_CLONEWINDOW) This function gives information (mapbasic) about the front Map window which can be used to regenerate the map. Is there any ...
7
votes
2answers
281 views

.Net Solution Structure for ArcObjects and Geodatabase programming

OK - I understand that this is a bit subjective - but you're the best community forum I've got! So, we are talking about starting a fresh customisation for ArcGIS or a Windows app using Engine. I ...
1
vote
0answers
178 views

How to retrieve the value of a cell in RasterLite?

Just wanting to know the SQL statement needed to find out the pixel value for a location, when the raster is loaded into SpatialLite as a Raster? I loaded the Raster using rasterlite_load -d ...
12
votes
1answer
10k views

How to convert/typecast from Polygon to Multipolygon in PostGIS?

Is there any way to typecast Polygons to Multipolygon type? For example, I have created a circle using ST_Buffer() on a point. The return type of that function is of Polygon type. The problem is that ...
4
votes
3answers
187 views

Math module VS PostGIS

I have a simple (and maybe stupid) question for you today. I have to compute intersection points between GIS polygons and imaginary lines I draw thanks to a script of mine... And I wonder if it would ...
0
votes
1answer
179 views

How do I assign a variable to a SQL Server ArcSDE database's feature class?

I'm using ArcGIS Desktop 10 and have no experience using Python with a SQL Server ArcSDE database. When using a shp file or file gdb it is very simple to reference a given feature class by simply ...
1
vote
1answer
3k views

Problem inserting Geometry into PostGIS Table

I am new to Postgis and I have imported a shapefile containing point layer into the postgis, and the SRID i had chosen was 4326. now while inserting the values into the table I am getting problem. My ...
7
votes
2answers
2k views

ArcGIS Server 10 - Feature Editing Services - Best Practices

What are some best practices for editing Multi-versioned sde data through a feature service? What should I be looking into? EDIT: seeing that when publishing a feature service the service is ...
10
votes
2answers
3k views

Is there a Free Aggregate Points tool out there for ArcGIS 10?

I need to do some Getis-Ord analysis but first I need to aggregate my points. I know of XToolsPro, but the aggregate points function is locked and you must purchase a license to use it. I am ...
1
vote
2answers
1k views

How to convert data in NAD83 (NSRS 2007) to NAD83 (CORS 96)?

I'm quite a ways outside my box on this one, but I would ceratinly appreciate any perspectives on this issue. I have some control points from NGS that are in NAD83 (NSRS 2007) that I would like to ...
10
votes
2answers
1k views

Which Windows GIS editors support the creation of 3D shapefiles besides ArcGIS with 3D Analyst?

I need to find and easy and affordable way to generate 3D linear shapefiles in Windows so one of our users can inspect our tool. We incorrectly assumed that he had 3D shapefile source data available ...
3
votes
2answers
2k views

Printing maps from OpenLayers with a Google Maps base layer

I need to implement an automatic pdf report generator on a web site. In the generated pdf file I need to insert images from maps extracted from OpenLayers with a Google Map base layer. On top of ...
2
votes
1answer
479 views

Using Natural Earth Dataset As WMS

This Question is about Natural Earth Project. I tried to do some research about creating my own WMS and came across this project. The web page says : Natural Earth is a public domain map dataset ...
0
votes
1answer
292 views

How to reuse Thematic layer definitions in Mapinfo?

I have a map from table. Let the table be TABLE1. Now That I have created Thematic Map from Column1 of this table. Again I executed the following query Select * from TABLE1 where TABLE1.column1 ...
1
vote
1answer
235 views

Get the names of currently visible rasters from a catalog

I have a simple win form app with a map control on it. The map has a layer (MADtedLayer) that was initialized from a catalog in a personal database (Access). The files displayed are DTED. I need to ...
2
votes
2answers
528 views

Parameterized insert query to PostGIS fails

I have a PostGIS database table that I need to insert data into. I'm using Python 3 and the pg8000 interface to Postgres. Somehow, parameterized inserts do not work. If I do iq="INSERT INTO ...
9
votes
1answer
1k views

How to add features to a PostGIS layer using Quantum GIS?

I am using Quantum GIS and the PostGIS dbms. I am able to call the PostGIS layer into QGIS but i am unable to add feature to it. I am using the method of adding features to a Shapefile but still it is ...
13
votes
3answers
3k views

How do I use sys.exit(0) in an arcpy script to exit early without having an error message show up?

I have an arcpy tool script for ArcGIS 10.0 that has two major functional sections. The user can choose whether or not to run the second section. If the user chooses NOT to run the second section, I ...
11
votes
4answers
436 views

How to generalize coastlines?

I have a large set of data points that essentially represent the coastline of the world. I don't know the exact resolution but I'd say it's in the neighbourhood of 5-10m. Imagine a set of points ...
3
votes
1answer
134 views

Prevent ArcGIS from maintaining extents during resize

Background: I have a custom ArcGIS application written using ArcGIS Engine 10.0 that at its simplest form is just a map control inside of a resizeable form. The Problem: During resizing of the ...
3
votes
2answers
464 views

Project twitter geo data into wgs 84 map

I'm currently working on displaying twitter geo data (currently just long/lat -> cartesian without any analysis). This is the world map (source: naturalearthdata): ...
10
votes
3answers
5k views

How to create polygons with straight lines and right angles in QGIS?

I am running QGIS 1.7.0 on Mac OS X 10.6.8. When creating a polygon, how do I do it so that the lines are straight (90, 0 degrees, etc.) and when I create corners they can be right angles? For ...
5
votes
2answers
2k views

Using ArcGIS 10 ModelBuilder to perform In-line variable substitution for input data path?

Does anyone know how/if you can use in-line variable substitution for an input path name in ModelBuilder for ArcGIS 10? I used "get field value" to retrieve a code from one feature class, and I ...
1
vote
2answers
210 views

Finding zones with nodata in ArcGIS 9.3

I have a DEM raster with some small and large areas of NoData. I also have a raster defining zones (the zones consists of a rectangular grid). I want to create a new raster marking the zones where ...
5
votes
0answers
101 views

Is there a tool to retrieve the projection system used to create a shapefile when the prj file is missing? [duplicate]

Possible Duplicate: .shp with unknown coordinate system Are there any tools to help retrieving the projection system used to create a shapefile when there is no .prj file? Given that ...
5
votes
1answer
367 views

How to filter points based on proximity while inserting into PostGIS?

I have a large amount of locations that need to be inserted to a PostGIS database. However, I'd like to aggregate these points so that if there's already a location, say nearer than a kilometer, then ...
3
votes
1answer
2k views

Linear Referencing using ArcGIS v10

I'm a fairly experienced ArcGIS user, but am new to Linear Referencing. Here's my problem .... I have a road segment dataset, stored as a simple line feature class in File Geodatabase, and I have a ...
1
vote
1answer
250 views

What is the sequence of select query execution in Mapinfo?

I have confusion with the following query: Query 1: Select * from TABLE where vendor = "vendor1" OR "vendor2" OR "vendor3" ...
3
votes
0answers
125 views

Looking for best practices for GIS file systems [duplicate]

Possible Duplicate: Organization and tidiness issues - How do you deal with multiple copies of layers? I'm trying to organize my GIS data in a file system. I work with DTED (0,1,2), raster ...
5
votes
1answer
3k views

Why is PostGIS query not using spatial index?

I am having an issue with a spatial query that is not making use of indexes. My schema is: CREATE TABLE geoplanet_place ( woeid integer NOT NULL, "name" character varying(300) NOT NULL, ...

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