All Questions

1
vote
1answer
1k views

Feature Cursor Count on mutiple layers

I would like to get a total count of multiple layer features (defined) within the ArcMap view extent. The code works fine with one layer but when I add a second or third layer with an "OR" operator I ...
10
votes
2answers
4k views

Selecting by bounding box with PostGIS

I have a large dataset in a PostGIS database. I am viewing it via a web interface that loads the data as GeoJSON. There is too much data to give the client all at once (10s of MBs worth...) so I would ...
4
votes
1answer
2k views

Google Maps API: Is there a way to do proximity analysis to POI

Using Google Maps API can I do proximity analysis, for example: In a state, let's say Virginia, display all the points that are 500 ft/m from a POI such as McDonalds or Bob's Diner, 1,000 ft/m from ...
1
vote
2answers
494 views

extension list on tools toolbars

I'm sorry because my english isn't very good, I hope you're able to understand it. I'm using arcgis 9.3 right now, but when i try the Tools dropdown, then extension, there are no extensions listed. Do ...
1
vote
1answer
702 views

How to Convert Code from VB to Python in Map Algebra?

I have a problem with Map Algebra in ArcMap 10 to convert some codes made by VB, so i need to convert it to python to work in arcmap 10 without problem. and can any one help me how do i deal with map ...
5
votes
1answer
5k views

Watershed Delineation

I am trying to delineate just the catchment area of some lakes, and am wondering the correct way to do this. I already have a filled DEM, along with a flow direction and a flow accumulation raster. Is ...
0
votes
1answer
1k views

Change color of shape in Layer File

I currently have a layer file - in this case one of the United States. This layer contains a shape for each state so if I were to open the TOC Control and expand the "United States" I would see ...
0
votes
1answer
541 views

Programmatically uncheck layer in AxTOCControl

I am running my map in dynamic display mode, and I want to programmatically uncheck a layer that is not a IDynamicLayer that is visible in the AxTocControl -- its just a regular layer file. I ...
22
votes
9answers
2k views

Good Symbology for Interactive Web Mapping

When a user clicks on a map what should they expect to see? I would say a symbol for where they clicked. A pushpin seems to be the most accepted icon for generic data. Google has pushed the upside ...
5
votes
3answers
3k views

Creating a raster surface of overlaps from vector polygon shapefiles?

Basically what I'm trying to do (in ArcGIS 10) is to compare three vector files in order to create a 'comparison' raster layer. I tried using Data Comparison (under Data Management tools) but it ...
3
votes
2answers
665 views

Printing MXD at A3 always prints at B5

Context ArcGIS 9.2 Build 1500 ArcObjects Windows Forms application running outside of ArcMap, similar to ArcEngine product. Accessing mxd to print out page layout to A3 paper. Mxd is saved with ...
5
votes
1answer
266 views

When is it better to use 64 bit File GDB access?

The beta 2 release File Geodatabase API includes 64 bit support. Esri says arcobjects is still the "preferred" method to interact with the file gdb. However, arcobjects has no 64 bit support. ...
1
vote
1answer
908 views

Change The Label Field In GeoFeatureLayer

I currently have a basic shapefile that's a map of the United States. It has the name of the states, populations, and other pieces of information that I can get the names of via the following code: ...
5
votes
3answers
1k views

In Qgis, Is it possible to edit the datasource of a Postgis layer?

After creating a layer with RT_SQL_Layer plugin, I want to change some details in the query. Is it possible? or I have to aways create a new layer every time I want to change something in the query? ...
0
votes
4answers
894 views

MFC Dialog Application using ESRI ArcEngine 10.0

I'm new to ESRI ArcObjects and I'm trying to create a basic MFC dialog application. I add the License and MapControl to the dialog resource. I compile and run the app, but I get the following runtime ...
8
votes
5answers
6k views

Remove feature layer using ArcPy script?

I have an ArcPy based script where I'm trying to intersect two layers where one layer must have its centroid in the other layer. Since I need to know that one layer (feature_layer below) includes ...
0
votes
1answer
423 views

Update, Insert Cursors don't work on Features that have annotation?

I've been working on a script to update my feature classes by grabbing new data from one feature class, and applying it to another feature class. It does this with several cursors, basically get ...
8
votes
3answers
3k views

GeoExt Vs Openlayers

OK: [ Openlayers + ExtJS = GeoExt] I am new to webmapping and still shopping around. I bumped into a Case Study with a gentle learning curve, matches my needs and it uses OpenGeoSuite. I got to learn ...
6
votes
3answers
392 views

Organizing PostGIS data of a large database for fast dynamic user searching

I have a large amount of GIS data, roughly 30 layers, each with 50,000 to 100,000 (Geo)records. Some of this data is GPS collected points, others are POI, some is government provided data (roads, ...
1
vote
2answers
872 views

Help with a Simple Code to Read a Metadata from a Raster File

Please help me with a python code to read metadata from a Raster file. Thanks
0
votes
1answer
247 views

What URL should i use?

By using the code below, we can query featureSet to ArcGIS Sample Server. queryTask = new ...
3
votes
4answers
4k views

Select by attributes - records with the largest attribute value

Using 'Select By Attributes' how can I select records from a shapefile database table where a numeric field contains the largest value. Need to use MAX function or something like that but can't get ...
5
votes
1answer
2k views

Converting a CAD/DXF file to a SHP file

I need your ideas and suggestions about a problem.... I have a dxf file which was converted from a CAD file. I used QGIS to convert it to a shp file... This is when I realized that the text ...
12
votes
1answer
1k views

How do you use GRASS's v.kernel?

I am flummoxed on how to use GRASS's v.kernel. I have a vector layer of around 2.5 million points. I want to make a heat map using v.kernel to show concentrations, since I have variable instances ...
3
votes
1answer
2k views

Does ArcGIS API support Geoserver's WMS and WFS services?

I want to know whether ArcGIS API for Java Script support Geoserver's WMS and WFS standards. I have published my data on Geoserver and i want to query my data by WFS in ArcGIS API to develope my ...
3
votes
2answers
3k views

Using REST service with GeoServer

I have downloaded and installed GeoServer 2.1-RC1 which shipped with RESTconfig. How can i check whether REST service is installed with GeoServer or Not ? I put this ...
2
votes
2answers
150 views

Can the arrows produced by the d.rast.arrow GRASS script be queried or stored?

I have created a map with the flow directions using the d.rast.arrow. Can i query on the map to know where the direction of the arrows are? I am going to use the arrow directions in an algorithm. Or, ...
43
votes
15answers
24k views

Interview questions for hiring a GIS Analyst

What are the best interview questions for candidates for a GIS Analyst position? I am looking for techniques for interviewing analysts at varied experience levels (we are currently looking at hiring ...
3
votes
3answers
763 views

How do you produce a output table containing distances between mineral grains at various azimuthal directions?

I am using ArcGIS 10, the newest version and I am a senior at Western Carolina University and working on my senior thesis and the data set in which I have are images of mineral thin sections all ...
2
votes
3answers
472 views

How to find wmsURL? And how to use QueryTask method?

I have couple of questions. var wmsLayer = new esri.layers.WMSLayer(wmsURL); with this line of code i can display wms layer over any base Layer. Now From where I get wmsURL ? I have published my ...
2
votes
1answer
2k views

How to update feature class by iterating through values with branching?

I'm really struggling with getting this to work. Basically, I want my script to get the "newID" value and use that as a look up value. If the "newID" is found in the OldID list then do one thing, ...
23
votes
5answers
9k views

Optimizing osm2pgsql imports for OSM data

I'm currently building an instance on EC2 on which to import the entire Planet.osm snapshot of the whole Earth's worth of data for some projects we're working on. I've spun up a large Ubuntu x64 ...
2
votes
2answers
269 views

Migrating Defense Solutions objects from ArcGIS 9.3.1 to 10.0 gives Unable to cast COM object error?

I've got an ArcGIS Engine application that uses the IMADtedLayer interface to access VPF DTED catalog layers and adds them to a map. The code ran fine under v9.3.1. I just updated to v10, and now I ...
1
vote
1answer
176 views

DrawPolygon problem in DrawDynamicLayer

I have a class that inherits from BaseDynamicLayer and I override the DrawDynamicLayer() method. Is there something special that needs to be done for a successful inDynamicDisplay.DrawPolygon(poly) ...
6
votes
1answer
9k views

How to use Select by Attributes query with semicolons?

I am trying to select multiple (50 or more) unique numeric records using ArcGIS 10's "Select by Attributes" using semicolons ';' after each record which it verifies as good to go. Please see screen ...
1
vote
0answers
481 views

ArcObjects: How to get the size of the formatted text part only of a TextElement whose text contains formatting tags?

I'm working in ArcGIS 10.0 and Python 2.6.5. I have a string, say 'mMx', that I want to enter into a TextElement (in the data view). The lowercase letters are to be substituted with a graphical ...
0
votes
1answer
381 views

How to publish Web Map on the internet?

I'm trying to use IIS 7 Manager to publish a web map on the internet except I have the folowing problem: I installed the ArcIMS web ADF for Java, and created a new webpage which depends on ArcIMS ...
5
votes
2answers
849 views

How to set a map's extent to the envelope in miles

I want to set extent of the map into envelope which sizes are defined by user in miles(kilometers, whatever human readable unit). How to make it? I wrote the following code: static void ...
12
votes
5answers
1k views

Quality of free geodata compared to commercial sources

What are the sources of excellent geo-location data as possessed by Google Maps ? I am wondering that, even with large amount of volunteer work involved, why is OSM data not comparable to theirs in ...
3
votes
0answers
163 views

Three Dimensional Routing Input Location Errors and Questions, ArcGIS10

I am having a bit of a problem with my three dimensional route solving. I am creating an interior building network, and ideally would be routing from room to room. I created a line feature class, with ...
10
votes
5answers
6k views

How to calculate Topographic Ruggedness Index in Arcgis?

Does anyone know how to calculate Topographic Ruggedness Index in Arcgis without access to command line arcinfo workstation? "The topographic ruggedness index (TRI) is a measurement developed by ...
6
votes
2answers
918 views

ArcGIS metadata creation scripts

I maintain metadata as I always have....inconsistently and sporadically.. I know...booh to me. Anyways, I know python can pull all kinds of info out of mxd in V10. Has anybody come up with some ...
4
votes
4answers
620 views

Compressing map algebra outputs from ArcPy

When creating a raster map algebra output, is it possible to set its compression? I'm creating a model which generates many hundreds of rasters, and currently each is being stored without any ...
1
vote
1answer
366 views

Can I import symbology from an .axl file into ArcMap?

I'm setting up new Arcserver services, and some users would like the symbology in the new services to match the old IMS services. With that in mind, is it possible to either: a) import the symbology ...
34
votes
3answers
8k views

LatLon or LonLat, what's the “right” way to display coordinates and inputs?

I'm trying to get a sense if this is an issue for others or every input/output should be labeled so user is not confused and just go with it? I think almost everyone pronounces it as "LatLon". Who ...
4
votes
1answer
630 views

How configure ArcGIS 10 Server for .NET at http://server/rootContext/ArcGIS rather than http://server/ArcGIS

We are developing a Flex application which will communicate with ArcGIS server via a reverse proxy. The reverse proxy configuration is such that the host and path portions are separate configurations. ...
3
votes
3answers
2k views

River drainage basin boundary

I'm looking for a set of outlines of the river basins in the UK - I don't need a particularly detailed or highly accurate map - just a map saying point X will drain into the Thames or point Y will ...
2
votes
2answers
426 views

Buffer in ArcGIS v. ArcINFO 9.3

I have ArcGIS 9.3 and my question is regarding Buffering. Is that only allowed in ArcINFO or is there a way to use a buffer in ArcGIS?
7
votes
1answer
13k views

find the centroid of a cluster of points

While searching the web, solutions for finding centroids of polygons come up rather often. What I'm interested in is finding a centroid of a cluster of points. A weighted mean of sorts. I would ...
0
votes
3answers
1k views

How to access map service from GeoServer and can we use that service in ArcGIS API?

I have installed GeoServer and publish one shapefile on it. Now my question is, How can i access that shapefile from GeoServer? and can i work with that resource (shapefile) with ArcGIS API. As we can ...

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