All Questions

5
votes
4answers
4k views

Live KML from PostGIS to Google Earth

Is there a way to bring data from a postGIS database into Google Earth to view live? I know of the asKml function in PostGIS, but I'm interested to know if anyone had managed to hook up a kml so that ...
1
vote
1answer
941 views

How to bring georeferenced raster data into MAPublisher?

What is the appropriate method to import a georeferenced raster image into MAPublisher? I have been able to import other forms of map data, and created map views and such for them, but I am now ...
7
votes
8answers
2k views

List of Virtual Globes

I kept a listing of virtual globes in 2005 and 2006, but it's now woefully out of date http://geography2.blogspot.com/2005/11/listing-of-virtual-globes.html. Today, the main four seem to be: Google ...
0
votes
1answer
136 views

Retrieving attribute's domain using ArcIMS ActiveX Connector?

I have an ArcIMS Image Service that's consuming data stored in an ArcSDE database (both v9.3.1). Many of the layers have attribute columns that use coded value domains defined in the SDE database, ...
9
votes
3answers
2k views

Looking for a fast, open-source raster cost-distance function to use in code

I've been scouring the internet for a fast, open-source cost-distance function that I can embed inside my code. The functionality should basically work like the ArcGIS implementation where I can ...
39
votes
12answers
7k views

Representing network flows? [closed]

For a project I'm working on, I need to represent network flows over 1,000 zones with directionality. Any suggestions on displaying the information in a nice and non overwhelming way? Any examples ...
7
votes
5answers
450 views

Using Creative Commons licenses for spatial data?

As more people and organizations are realizing the importance and benefits of publishing their data under an 'open' license, people are looking for the best license to apply. Creative Commons CC ...
6
votes
6answers
3k views

What are some web based clients for GeoServer?

There is a list of Web Clients for Geoserver on the Geoserver site (http://geoserver.org/display/GEOSDOC/Clients). Unfortunately, it is posted as no longer maintained. Does anyone have a current list ...
6
votes
2answers
3k views

OpenLayers filter: OGC (xml) or CQL?

While having not used filtering that much in OpenLayers, we are discussing which type of filtering we should use: The OGC XML filter or the more simple CQL filter? Are one of them more appropriate ...
3
votes
5answers
2k views

Ways to load OS VectorMap data

Us lucky fellows in the UK have been able to access public geodata from Ordance Survey under an open licence since April this year. Some of the datasets, including VectorMap, are broken into 100 ...
10
votes
5answers
2k views

How to convert line simple features to topological network?

using Gdal/ OGR is there a way to convert a shp, kml, or PostGIS line layer into a network of nodes and segments so it can be used in packages such as networkx?
1
vote
1answer
387 views

Requirements for BaseCustomLayer in ArcScene?

What must be implemented/included to add a layer deriving from BaseCustomLayer to ArcScene? I have had success adding a BaseCustomLayer to ArcMap by implementing Draw, AreaOfInterest, Cached, ...
3
votes
2answers
2k views

Adding KML layer using ArcGIS API for Silverlight?

I am trying to create a map which will include radar rainfall data in a KML format. How can I easily do this using the Silverlight API (the version doesn't matter)?
13
votes
3answers
10k views

Creating a custom OpenStreetMap tile server

I'd like to create a map tile server based on the entire OSM planet database for a project I'm working on. I've worked with a couple of guides to try getting something up and running, but haven't ...
9
votes
7answers
5k views

Is there an existing library for converting ArcGIS Features to Json?

Is there an existing library for converting ArcGIS IFeature types to and from Json/GeoJson?
6
votes
3answers
952 views

What is ArcGIS for Desktop (and Geodatabase) equivalent to Regions of ArcInfo Workstation Coverages?

Here's one for those who've been around the block a few times. ArcInfo Workstation from days of yore had an intelligent data model called Regions or Region sub coverages. With this model one could ...
3
votes
1answer
378 views

Geoprocessor AddMessage issue in Eclipse

I wrote the following code as a wrapper around messages pushed during the running of the script. Using Python IDLE this works fine, but in Eclipse I get the following output: def ESRIP(gp,message): ...
4
votes
2answers
23k views

How to Display Coordinates of an Existing Point Layer in ArcMap

I have been asked to provide a list of coordinates for a point layer in our GIS. I am currently using a state plane coordinate system. How do I view/list this data. Below is the data request in it'...
6
votes
3answers
1k views

Has anyone discovered any compatibility issues between ArcGIS 10 clients editing older ArcSDE geodatabases (e.g 9.3.x)? [closed]

I’ve read the ESRI documentation here: http://goo.gl/UUSM (link to ESRI) and http://goo.gl/TsmV (link to ESRI) , so I know the documentation states that you can. And I’ve actually edited data (a ...
10
votes
3answers
10k views

Define “geospatial data” for a non-GIS professional

I realize this is a sort of a subjective question, but I've seen other subjective questions on the site, so I thought it I'd put it out there. A colleague recently had a request for "geospatial data" ...
6
votes
4answers
6k views

Vertically docking Tools toolbar to left of map and right of TOC in ArcMap 10.x?

In general, I really like the docking environment in ArcGIS 10. As I was showing off ArcGIS 10 to some of my end-users, I couldn't get the toolbar docked to the left of the map and to the right of ...
22
votes
2answers
10k views

How can I find a point inside a polygon in PostGIS?

How can I find a point that is guaranteed to be within a given polygon in PostGIS? I am aware of the ST_Centroid function. However, the centroid is not always within a polygon, see below: ...
82
votes
8answers
10k views

Managing large amounts of geospatial data? [closed]

How do you manage your geospatial data? I have terabytes of data spread out over hundreds of datasets, and have an ad-hoc solution using symbolic links within projects which link back to an domain-...
12
votes
5answers
15k views

How can I measure area from geographic coordinates?

If I have polygons in geographic coordinates (WGS84), how do I measure the total area each takes on the surface of the earth, taking into account the curvature of the earth?
7
votes
6answers
562 views

What Professional / Industry Associations are available that are related to GIS?

This was a well liked (but not hugely rated) question in the beta, so here goes. Please provide a brief synopsis and links if possible. I'd also like to hear about things that are in the planning ...
2
votes
2answers
239 views

Publish a Feature class on ArcDesktop with C#?

I have a feature class in ArcCatalog. I need to save the feature class to a Map and then publish the map to the Arcserver. All programatically and hopefully in C#. I can't seem to find any examples ...
0
votes
2answers
209 views

APDM - error exporting database from Oracle

I have a fairly large database on a slow network and I am using a third party tool to update data which calculates other fields and so on. I have a guid string with an empty box (weird glyph - seen ...
4
votes
2answers
3k views

Merging two polylines with programming?

We are currently working on a project where we have to merge sections (polylines) to a route, but the big question is how to do this. We have currently tried adding those two as segmentcollections but ...
15
votes
4answers
1k views

GIS in medical geography

I am interested in knowing about current trends in application of GIS for medical geography other than disease/epidemic mapping, heath atlas, availability of health infrastructure (hospitals, blood ...
6
votes
8answers
322 views

Podcasts related to geospatial technologies

Here I would like to make a list of the best podcasts related to geospatial technologies. Do you listen to any? Do you find them interesting and informative? One podcast per answer, please.
18
votes
2answers
6k views

How can I calculate the bearing between two points in PostGIS?

How can I find the bearing between two points in PostGIS? Please specify in your answer whether or not the method producing a bearing on the spheroid, or a planar bearing.
217
votes
11answers
112k views

Difference between projection and datum?

What's the difference between a projection and a datum?
4
votes
0answers
482 views

Bad data beaking IRelationshipclass.GetObjectsRelatedToObjectSet

I have two workspaces - one a File GDB, the other SDE (SQL Server). Both workspaces contain the same data with the same relationship classes. When identifying features in ArcCatalog, the results ...
75
votes
16answers
9k views

Explaining what GIS is to 11 year old kid?

Well, since it was one of the highest rated proposed questions, hasn't been asked yet, and I would love to know the answer, I thought I'd ask it. How do I explain what GIS is for the 11 year old kid?
1
vote
5answers
1k views

Store Geometry in a database with the ESRI Silverlight API

Is it possible to store geometry objects in a database using the ESRI Silverlight API? For this particular case, the client may have SQL Server 2005 installed instead of 2008 and therefore I can not ...
33
votes
7answers
4k views

Work flow for georeferencing imagery using open source tools?

Does anyone have a recommendation for a work flow for georeferencing high resolution aerial photography using open source tools? Comparison of user friendliness and robustness between Quantum GIS ...
4
votes
3answers
8k views

How do I upload a Featureclass to a Geodatabase in C#?

I have a featureclass with Arcobjects that came from a Shapefile and I wish to import it into a geodatabase. I have the geodatabase connection, I just don't know how to load the feature class to a ...
7
votes
4answers
3k views

Improving upon ArcGIS Buffer/Dissolve performance?

I'm wondering if anyone else has experienced significant performance penalties when using the ArcGIS buffer function with the 'dissolve' option on point features. My dataset is a shapefile of 260 ...
8
votes
2answers
1k views

Are there any open source mapping APIs/toolkits for drawing axes,labels,graticules etc?

I tried to post a more generic question to meta, but it's my first question, so I didn't have a reputation yet. The first question I have is whether this is an appropriate place to ask questions ...
5
votes
4answers
2k views

Is there a way in the Google Maps API to perform a union?

I'm looking for a way to take the overlap area of multiple polygons and work with that result as a single entity, ideally all in the API.
2
votes
4answers
6k views

struggling with GeoDjango install: ERROR: could not access file “$libdir/postgis-1.5”: No such file

I'm installing GeoDjango on Mac OSX. I've followed the official Mac install instructions, which all went smoothly, and am now creating a spatial database template for PostGIS. However, when I try to ...
6
votes
2answers
2k views

Unions of polygons (Postgis ST_UNION for Geography type)

I am looking for a function that will return the intersection of 2 or more polygons (geography type). I am aware of ST_UNION, ST_COLLECT but it works only for geometry type.
1
vote
2answers
560 views

Identify Error with ArcGIS Server 9.3

I am receiving an error ("Error executing identify") when I try to perform an identify operation on map running on ArcGIS Server 9.3. All of the inputs appear to be correct when I check them in the ...
1
vote
1answer
219 views

Convert from/to Macon MapKit!

We use an ancient Macon MapKit! component to display GIS maps in a Windows gui. Does anyone know what has become of MapKit! ? All traces of MapKit! have been removed from the current GfK GeoMarketing ...
8
votes
4answers
2k views

How to represent bimodal attribute value distributions on a map

I'm looking for a visualisation method that enables me to represent bimodal or even multimodal attribute value distributions on line features. A bimodal distribution has two different modes that ...
2
votes
3answers
1k views

TMS tile layer in ESRI ArcGIS iOS API

Great that this forum exists now. I hope it will thrive. Let me start by saying I did ask this particular question on the official iPhone SDK forum as well. I have seen a working example of a ...
1
vote
1answer
1k views

psycopg2 error with QGIS 1.5

So I just installed QGIS 1.5 using the windows installer not the osgeo4w one and now any plugins that need access to PostgreSQL databases don't seem to work, they all throw a: "Couldn't import Python ...
1
vote
1answer
292 views

Where is the ArcGIS ServicePackFinder 9.3 utility found?

Where is the ArcGIS ServicePackFinder 9.3 utility found? I know it's for download, but no amount of trawling can find it.
13
votes
4answers
13k views

Will ArcGIS Desktop support latest Python 2.x or Python 3.x versions?

I'm curious to know whether ArcGIS Desktop 10.0 will support newer versions of Python than 2.6. And for that matter newer versions of NumPy (ie, 1.4, 1.5 etc). I'm sure that this documentation is on ...
31
votes
12answers
47k views

Converting shapefiles to text (ASCII) files? [duplicate]

How can I convert a shapefile (GIS) to text, or, how can I extract the information in a shapefile?

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