2
votes
3answers
418 views

protecting kml access to google only

I have a large amount of data (thousands of polygons) that I want to share with people through my site. I want them to be able to view the polygons, and due to the large amount of data, I am not ...
6
votes
2answers
1k views

Valid feature class, table names in ArcGIS

hi What are valid rules for name of feature class or table in ArcGIS. Is there any supporting document some body know which can explain all the limitation in ESRI platform. In ESRI support site i am ...
16
votes
4answers
732 views

How to implement ringmaps in ArcGIS?

In a recent article by Stewart and colleagues in IJHG I stumbled upon interesting technique of visualizing data using ringmpas. Some more information referenced in the article about this technique ...
34
votes
4answers
6k views

What are the pros and cons of PostGIS geography and geometry types?

My company uses geometry (the_geom) data type for storing geospatial data. I've recently been acquainted to the concept of geography (the_geog) data type which, as I understand it, stores the SRID ...
1
vote
3answers
536 views

How to stack labels

How can labels be stacked? The data has multiple points stacked at the same point location. All of the labels from all of the points at one location need to be stacked in a list next to the "group" ...
2
votes
1answer
652 views

How to use GRASS with HEC-RAS?

I am trying to use HEC-RAS for the flood modelling of my flood simulation. How do I use the text file output of HEC-RAS with the GRASS script r.inund.fluv?
41
votes
20answers
16k views

Why do you use ArcGIS for Desktop?

I'm new to GIS, having only dabbled with ArcGIS for Desktop for about 4 weeks in 2007. The business I am at wants to target writing complete solutions that involve GIS as it would benefit their ...
9
votes
2answers
8k views

Converting projected geoTiff to WGS84 with GDAL and Python

Apologies if the following question is somewhat stupid, but I am only VERY new to this whole GIS thing. I am trying to convert some projected geoTiff images to WGS84 using gdal in python. I have ...
9
votes
6answers
3k views

Using ArcGIS Online Base Maps without Esri Software?

Since the end of January 2011: "ArcGIS Online map services are available at no cost regardless of use." - http://www.esri.com/software/arcgis/arcgisonline/standard-maps.html However, the ...
2
votes
1answer
604 views

How can I do client side linear referencing in an Esri Silverlight/WPF app?

I have an Esri Silverlight/WPF UI with a mapcontrol and a slider. In the mapcontrol is a graphics layer with a single polyline on it, created using coordinates from a layer in a mapservice. The ...
3
votes
2answers
2k views

How to integrate Proj4 into an iOS / iPhone project?

This may be overkill, but I need to reproject a point coming from the CLLocationManager, which is in EPSG:4326, to Dutch RD (Double Stereographic, EPSG:28992) in my iOS application and I am using ...
22
votes
8answers
5k views

GIS jobs online

What are the best websites for scouting GIS related jobs?
4
votes
3answers
558 views

Modeling Telecommunications Infrastructure in GIS

I am looking for resources that will help me to model telecommunications infrastructure of a small town/campus in GIS. Can anyone suggest where to look for: A telecommunications GIS data model (I ...
3
votes
3answers
1k views

How to avoid “No Data” from Tiled Map Service in Silverlight

I'm using the latest and greatest Silverlight with ArcGIS Server 10 and when I do a search for features in my operational layers (wells) and zoom into them I'm seeing "Map Data Not Yet Available" ...
5
votes
4answers
1k views

What is a best practice way to display/feed US census/tiger data into Google Maps API?

Let's say I want to display age, income, etc based on census block groups on Google maps. What is the best practice or recommended way to do so and also to allow to do simple queries?
3
votes
1answer
610 views

Problem setting IActiveView extent

I'm having a problem when setting the IactivewViews extent. I have done it the same way on other places and it does work. In here, it just throws me a LoaderLockException. // OLD CODE ...
0
votes
1answer
893 views

Openlayers toggle Marker controls and update information in external form fields

I am setting a form (for multiple addresses) where users can click on map by creating a marker for each address they want to input. Users can only create one marker per address and once the marker has ...
2
votes
0answers
559 views

OpenLayers WMS overlay tile projection

We are using OpenLayers for our GIS Application and we have base files from Ordinance Survey for UK maps. For creating WMS layers, we are generating tiles of 256 x 256 through Sharpmap Library but ...
2
votes
1answer
685 views

ArcGis Engine, select object(s) by mouse

I've got a standalone program using ArcGis Engine, showing a map on the screen like this: AxMapControl _mapControl; AxToolbarControl _toolbarControl; // in constructor: _mapControl = new ...
4
votes
2answers
250 views

Is GeoNetwork an appropriate choice when I need to automatically create large amounts of metadata?

I have inherited a GeoServer installation publishes ~13,000 - 18,000 WMS layers in a dozen or so datastores on a 12 hour schedule. Other than what's in the GetCapabilities document, there is ...
8
votes
1answer
452 views

ESRI HTTP where query

A friend and I are currently creating a pretty straight forward LINQ to ESRI library that sends HTTP queries to an ArcGIS MapServer and then parses the JSON response appropriately. Everything is ...
6
votes
1answer
1k views

What causes these shiny artifacts in Google Maps imagery?

Do you know what causes artifacts like this one: Source: ...
12
votes
2answers
2k views

Google Fusion Tables vs Amazon Web Services: which is better for GIS data?

What are the pros/cons for storing storing spatial data in Google Fusion Tables versus Amazon Web Services? Factors would include: Cost, performance, ease of update.
8
votes
6answers
388 views

What GIS Data should Amazon add to its Public Data Sets?

Amazon says: If you have a public domain or non-proprietary data set that you think is useful and interesting to the AWS community, please submit a request below and the AWS team will ...
1
vote
1answer
230 views

The resulting maps from a r.mapcalc script is not computed properly

This post is a continuation of my other post Why is my controlling shell script not working?. I created another post because this contains a separate issue that I encountered with the same scripts of ...
29
votes
5answers
8k views

Comparison of the different open source GIS servers

I currently know the following open source GIS servers: Geoserver: java based, vector and bitmap support, also supports. Is now on par with mapserver (performance-wise). mapserver: c/c++, used to be ...
3
votes
2answers
2k views

ArcGis Engine, how to zoom&pan to selected objects?

I'm writing a program using ArcGis Engine, and need to zoom&pan into the map to show the selected content. Loading and displaying the map does work using something like this: AxMapControl ...
3
votes
2answers
4k views

Select points under polygons?

Dear all, I apologise if this is answered elsewhere, but I cant find it. I have a point layer and a polygon layer (created from the point layer using local convex hull isopleths). I would like to be ...
3
votes
1answer
471 views

problem with building WKB from a geometry

I have some points in an array,stored by user click on the map in ArcMap,and I want to build a polyline and create a Well Known Binary sequence. I use IPointCollection interface to add this points to ...
11
votes
2answers
1k views

Tiling Vector data without losing geometrical and topological information

I am trying to figure out a way to sub-divide a vector based map into smaller blocks. I can tile the map based on different strategies such as q-tree. However, it is unavoidable to cut some polylines ...
2
votes
3answers
990 views

Arc Objects and non-spatial table

I am a new Arc Objects user, with little ESRI experience. We are using VBA to create a spatial report on a Map Control using a mdb table. The mdb table contains a Lat and Long field, and this data is ...
5
votes
1answer
616 views

3D visualization for marine navigation

Is there anyone who has some experience or knowledge on 3D visualization and/or GIS softwares capable of displaying 3D bathymetric data and 3D ship model together? Nearly all GIS softwares work with ...
1
vote
3answers
420 views

d.out.file is not working

I'm trying to use 'd.out.file' to save the displayed map to a PNG file. It failed and produced this message: "Command 'd.out.file' not yet implemented in the GUI. Try adding it as a command layer ...
0
votes
1answer
283 views

How to export a png file from a raster file? r.out.png has an error

I used r.out.png to export a png file, but it produced this error: (Sun Feb 27 00:26:32 2011) r.out.png input=raster_bulacanElevation ...
3
votes
1answer
834 views

Is there a way of cutting a raster map that is displayed in the GRASS GIS Map Display?

I have a raster map that I generated from cropping/masking from a bigger raster map. It produced a map with only a portion of not null values. I only want to have a map that is zoomed in to the ...
2
votes
2answers
593 views

Run Macro automatically

I am involved on a project which is about Generating 2 maps via running macros in Arcmap 9.3. It works fine when user push the "run macro" button but now I want to call arcmap from a web page. It ...
9
votes
3answers
354 views

How can Flocking Algorithms be used in GIS?

The first flocking algorithm was written by Craig Reynolds in 1986. A recent browser implementation can be found here. ...
3
votes
1answer
1k views

gp.Describe() on sde table

Python newbie needing help with a simple task. I'm trying to create a list of stand-alone tables in an sde workspace. Code below works just fine to list feature class names and paths and table ...
9
votes
2answers
3k views

Difference between Geoserver stores: ImageMosaic, WorldImage, ImagePyramid

What are the differences between the Geoserver stores ImageMosaic, WorldImage, and ImagePyramid? I noticed that ImagePyramid is no longer included in the latest Geoserver. Is one of these more ...
2
votes
2answers
804 views

albers projection to Lat, Lon

Thanks in advance for helping me with my issue. This GIS stuff is using parts of my brain that have remained idle since high school, and some parts are working faster than others. I have land data ...
5
votes
1answer
659 views

How to get GeoNetwork to search through PostGIS fields via GeoServer WMS

I can't seem to get GeoNetwork to search through my PostGIS fields via GeoServer WMS. According to the GeoNetwork Documentation: it should loop over datasets served by the service and produce ...
58
votes
14answers
8k views

How much math does a GIS Analyst need to know?

For someone studying to pursue a career as a GIS Analyst, what math courses should he/she take? Update Here's a long list of free Math courses from MIT to serve as a frame of reference. Which are ...
1
vote
2answers
1k views

OpenLayers - How to show UK Map with OSGB Projection

We are using OpenLayers for our GIS Application. We use Google and BingVE as source for the BaseMap. We use Projection in the OpenLayers with following code. We want to show UK Map with OSGB. ...
18
votes
4answers
5k views

What reliable GeoCoding service would you recommend me?

I'm looking for a web service providing a full address based on coordinates (and reverse). I'm ready to pay for that service. I don't want to use Google's API.
1
vote
1answer
339 views

CQL_TEXT in CSW doesn't work

I need to retrieve some data from CSW server running GeoNetwork. I'm using this query but it doesn't work: http://serverurl/geonetwork/srv/en/csw? REQUEST=GetRecords& SERVICE=CSW& ...
18
votes
2answers
379 views

How does Watson solve Geography problems?

In spite of losing to humans on the geography question, Watson still won Jeopardy. The explanations regarding this incorrect answer seem a bit lame to me (at 3:40 in the video). With a logo like ...
6
votes
1answer
1k views

What tile/tiling strategy should I use with GeoNode/GeoServer?

I've got a wicked GeoNode instance running, loaded with some basic vector data. I want to be able to serve our local-County aerial imagery as a basemap within GeoNode. I am thoroughly overwhelmed with ...
1
vote
1answer
676 views

How can i upgrade geoserver on a geonetwork install?

I have a default geonetwork install with Jetty and geoserver but i would like to upgrade to the latest (unstable) build of geoserver instead of the stable version it comes with. Any ideas how i can ...
4
votes
3answers
436 views

How can I programmatically determine if a shapefile contains points, polygons, or lines?

How can I programmatically determine if a shapefile contains points, polygons, or lines? ArcEngine 10, VS2010, C#
0
votes
0answers
241 views

A problem with Network Analyst C# code after upgrading to ArcGIS 10 [duplicate]

Possible Duplicate: IDatasetContainer2 CreateDataset method fails after upgrading to ArcObjects 10 I have a Network Analyst routine that worked for 9.3 and does not work with 10. I was ...

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