All Questions
154,942
questions
10
votes
3
answers
2k
views
What are the Pros and Cons of hstore data type in postgis?
PostgreSQL has a module named hstore that implement the use of key/value pairs (it's something like the OpenStreetMap model, but in a single table).
What are the Pros and Cons of hstore regarding GIS ...
- 9,759
7
votes
1
answer
8k
views
Converting Lambert Conformal Conic to WGS84 using Proj.4
I am attempting to transform data from Lambert Conformal Conic lat/long and I am having some issues with the results.
The shapefile I am attemtping to transform can be found here: http://tfr.faa.gov/...
- 175
2
votes
1
answer
575
views
Grass GUI integration
Is it possible to embed the GRASS map display to a C# application? I know that a PNG image can suffice but to make the application more interactive it could perhaps be integrated. In essence I would ...
- 1,367
2
votes
1
answer
570
views
Oracle tracing, bind variables, and ArcSDE
Oracle tracing with TKPROF is the recommended way to troubleshoot data access performance problems with SDE/Oracle. Unfortunately, queries that differ in any way are considered "different" and ...
- 1,987
1
vote
3
answers
460
views
Professional Certificates for GIS [closed]
Which professional certificates are most desired by employers seeking GIS professionals?
Are there any online courses available online that provides certification?
- 2,810
14
votes
8
answers
12k
views
installing GEOS, PROJ, GDAL/OGR into a python virtualenv on Mac OS X
I am trying to setup an isolated python virtualenv to work on GIS projects on my Mac OS X. Sounds like I will need to install the GEOS, PROJ, GDAL/OGR from the kyngchaos site here http://www.kyngchaos....
- 587
3
votes
4
answers
590
views
Migrating from GIS to CAD
There seem to plenty of resources out there to help users of CAD software move to using desktop GIS but is the reverse also true.
1
vote
2
answers
200
views
Accessing PAT,NAT of coverages using arcobjects
I want to access the polygon attribute table (PAT) and node attribute table (NAT) of an arcgis coverage using arcobjects VBA, is this possible?
user2007
5
votes
7
answers
557
views
2011 ESRI DevSummit [closed]
This is probably more of a community wiki question.
Who will be attending the ESRI Developer Summit next month in Palm Springs?
Which sessions and/or new products look most interesting to you?
...
- 3,478
19
votes
1
answer
130k
views
Listing available online WMS services (Weather, Land Data, Place Names)?
I'm Looking for WMS services freely available to the public to overlay on my application, specifically weather and AIS information.
Perhaps this is a good place to list some available online WMS ...
2
votes
3
answers
5k
views
Where can I download ArcGIS Engine 10?
Can anyone help me find the link to download ArcGIS Engine 10? I have tried to find it, but unfortunately I have not found it.
- 1,093
1
vote
1
answer
454
views
Shell script commands
I have this shell script:
#!/bin/sh
r.mapcalc water = 120
d.rast water
i=1
while [ $i != 100 ]
do
n=1
while [ $n != 10 ]
do
r.mapcalc < water.mapcalc
d.rast ...
- 1,367
2
votes
2
answers
469
views
Converting personal geodatabase feature class to coverage using ArcObjects? [closed]
how to convert personal geodatabase fatureclass to coverage using arcobjects with vba
pls provide me any documentation or samples.
user2002
4
votes
1
answer
2k
views
Creating Stored Procedure in versioned SDE_SQLServer geodatabase using DDL?
I've almost used SQL server_SDE geodatabases for 3 years in GIS projects and I don't know how can I create a stored procedure in geodatabase.I use ESRI case tool to create a geodatabase in ArcCatalog(...
- 826
2
votes
2
answers
368
views
Why are results all black using gdalwarp via QGIS?
I'm trying to convert a bmp image in BNG to WGS84 using gdalwarp (via QGIS). It seems to be running without errors but the output is all black. What am I doing wrong?
- 123
1
vote
1
answer
268
views
Why is controlling shell script not working?
I updated my post after I resolved the previous errors, but additional errors were produced.
I want to create a controlling shell script that contains water.mapcalc within it. The problem is, I do ...
- 1,367
1
vote
1
answer
1k
views
Reprojecting from MGRm to WGS84 using open-source tools
I would like to work with some of the Michigan state data (for example, this shapefile of cities ), but it is not in a common projection. However, when I try to reproject the file using ogr2ogr and ...
- 72
8
votes
5
answers
5k
views
Algorithm to find polygons enclosing points
I'm trying to find an algorithm that can determine the smallest possible polygons to cover a number of points.
I know how to get the convex hull around all the points, but say that the points are ...
- 191
11
votes
7
answers
2k
views
Platforms for repetitive automated mapping?
I could give a lot of examples, but imagine you have to do, for example, a study in 10 different locations and have to generate a lot of maps with the same layout, legend.
Maps can contain vector ...
2
votes
1
answer
404
views
stratigraphic ranking with field calculator?
I would like to populate a feature class float attribute with a numerical ranking of a text attribute of a geologic map. I have a field named [sheet_unit] with strings such as "H10, Q" and "J10, Pl" ...
- 211
1
vote
1
answer
1k
views
Change annotation font size on a IGeoFeatureLayer
I would like to change the font size for the annotations on an IGeoFeatureLayer. I tried to set it in the lpLabelEngine.Symbol.Font.Size below but the set doesn't persist.
IGeoFeatureLayer ...
- 2,760
5
votes
3
answers
534
views
Is there a recomended method for symbolizing inland lakes, streams and rivers in a topographic map?
I produce a lot of maps with inland lakes, rivers and streams overlaid over a dem surface symbolized with a color graduation (green for lows and brown for higher elevations) I also use a semi-...
- 20.2k
4
votes
6
answers
729
views
GIS for the masses?
Is anyone aware of a GIS application that an ordinary person with no GIS expertise could readily download and use? By way of analogy, the average Joe cannot download and immediately benefit from ...
0
votes
1
answer
141
views
Give Universal BaseCommand a custom Icon
If I add ControlsMapZoomInTool like this:
AddItem("esriControls.ControlsMapZoomInTool", -1);
To a Basic Context Menu I get the magnifying icon in my context menu right next to the words "Zoom In".
...
- 2,760
0
votes
2
answers
471
views
GeoTools 2.6.5: Cannot get JMapFrame to work because of problem with processStylers
I am trying to get JMapFrame to work to visualize some feature. Unfortunately I keep getting errors although this test app can be started. Toolbars etc. are shown.
18.02.2011 16:44:38 org.geotools....
- 133
2
votes
1
answer
290
views
Layer package duplication
I create a layer package from desktop 10 and the double click to decompress it on my machine (to see what the customer is going to see).
I get the initial folder (same as my lpk file) and then another ...
- 17.4k
2
votes
1
answer
2k
views
Using python lookup table to compare records with existing geodatabases
I am trying to use python to look through an access table containing facilities that need to have geodatabases with geodatabases that already exist in order to generate a list of facility geodatabases ...
user1993
9
votes
4
answers
9k
views
postprocessing GPS coordinates with RINEX data to improve precision?
Im doing some mapping for OSM in my region and I am curious if the precision of tracks from a GPS Receiver can be improved if they are post processed with RINEX data.
The tracking is done with a ...
- 193
11
votes
3
answers
10k
views
In OpenLayers zoom to extent of all overlays
In Openlayers I can zoom to the bounding box of all layers like this:
map.zoomToExtent();
I can also zoom to the bounding box of a single layer:
map.zoomToExtent(layer_name.getDataExtent());
Is ...
- 3,703
4
votes
5
answers
2k
views
How to use python to turn a .dbf into a shapefile
I have been scouring the internet trying to find a pythonic (sp?!) way to process this data..
Everyday we will recieve a load of data in .dbf format (hopefully) - we then need to save this data as a ...
- 417
0
votes
2
answers
6k
views
How do I check if Mapserver is installed or not?
I have installed MS4W (full) and choose port 8080 because on port 80 i have already installed IIS7. Now installation of MS4W is successful , but how i check ? I put http://localhost:8080/ in my ...
- 1,417
12
votes
5
answers
21k
views
Avoiding import arcpy error (RuntimeError: NotInitialized) when using IDLE?
ArcGIS Version: ArcGIS 10, Python 2.6.5
Machine: Windows 7 64bit (Intel)
I'm receiving the following error when importing arcpy using the the IDLE (gui and cmd prompt) and when using pythonwin.
I ...
- 395
4
votes
2
answers
2k
views
How can I create an adapter between the ArcGIS REST interface and WMS or TMS?
I'm trying to use imagery available via the ArcGIS REST tile cache interface, however the tool I'm using, JOSM, only supports WMS or TMS. In addition the data from the ArcGIS server is in a "special" ...
- 899
1
vote
1
answer
429
views
Hosting Geodatabase on ArcGIS Server?
I have a simple Geodatabase in access format. I'd really like to host this database on an ArcGIS Server through one of their services.
The idea is that my users would be able to connect to this ...
- 743
2
votes
1
answer
367
views
Using custom dlls in multiple arcmap applications
I'll do my best to ask my question. I develop a number of COM-based libraries for use within custom arcmap dlls (using ArcGIS 9.3.1 SP2, .NET 2008 C#). These would include a custom arcobjects "helper" ...
- 97
5
votes
3
answers
2k
views
How to label features in QGIS using SQL statement?
In QGIS, I can't seem to find a way to define the features that I want to label using a SQL query? Is this possible?
For example, I downloaded the OSM Natural shapefiles, and a lot of those features ...
- 22.8k
5
votes
2
answers
7k
views
Combining two adjacent raster datasets
I am trying to figure out how to combine two adjacent rasters into one raster using ArcMap 9.3.1. The problem I am having is that there appears to be a gap in the data. I would like to be able to ...
- 85
3
votes
4
answers
828
views
ESRI Javascript API: Return to the Map Extent you were at when you use browser back button
Can anyone give me some pointers (code would be helpful) on how to go back to the extent a user was at after they have navigate away and clicked the back button?
So I'm viewing a map at X extent I ...
user1986
1
vote
1
answer
1k
views
Labeling classes for small roads on large extent maps in ArcMap with SQL statement?
I have many small sub divisions that won't label nice, (lot of overlapping) unreadable.
While using the bullet leader symbol.
What would be the best statement that would place the labels in a ...
- 249
14
votes
6
answers
6k
views
What are the rules for releasing ArcObjects from memory in .NET?
Do I need to release each object? Is some memory management handled for me?
- 2,760
5
votes
2
answers
1k
views
Some objects missing after importing a .shp into PostGIS
I have a .shp file which I am trying to import into a PostGIS database using the "PostGis SHP and DBF Loader". This works smoothly but some (maybe 5%) of the records have an empty geometry field. (I ...
- 3,703
13
votes
1
answer
526
views
Scale in printed map (mxd) is different in code to manual printing
This question is related in part to a previous question I have asked.
I have tried printing an A3 mxd with the Print Active View code as published by ESRI and have changed only one line of code and ...
- 1,849
2
votes
2
answers
483
views
Accessing ArcGIS 9.3 geodatabase from 9.2?
If I'm using ArcGIS 9.2 is it possible to access a feature class from a geodatabase that was created by ArcGIS 9.3?
If not, are there any other ways to access the data?
- 239
3
votes
1
answer
1k
views
Steps to develop 2.5D web mapping application [closed]
I am developing a 2.5D GIS application. We are using GeoServer for layers.
We created building images which supports 2.5/3D
Already we have developed GIS application using OpenLayers, MapFish etc.
...
- 31
7
votes
2
answers
549
views
Exporting ArcGIS plugin data source to Shape?
I have implemented a plug-in data source for ArcGIS. In my case, the format read by the plug-in may contain point, line and polygon features within the same file.
In my implementation the data file ...
- 71
5
votes
1
answer
903
views
3d polylines and polygons
Is there a way to extract z values from a DEM into a polyline and/or polygon featurclass in arcmap 10? I would like to have 3d polylines and polygons to make cross sections in a CAD, but currently I ...
- 211
7
votes
3
answers
4k
views
Cannot get rid of lock on file geodatabase and feature class created in Python script
I have a python script, (for ArcGIS 10), that creates a new file geodatabase, creates a new feature class in that file geodatabase and then reads data from an SDE feature class to populate the new ...
- 1,810
2
votes
2
answers
325
views
How to use any ArcMap tool from a python script?
I'm trying to develop a tool that uses some of arcmap default tools like the Sketch Tool or Trace Tool. Is it possible?
Let me explain a little more, I need to draw a feature, ask for user input, and ...
- 530
3
votes
4
answers
1k
views
VBA script for Incremental labeling in Field Calculator?
I have a shape file with a bunch of pipes in it. I would like to be able to label each pipe with "Pipe - X". X being the number in the row that the pipe falls on (Pipe - 1, Pipe - 2, Pipe - 3, etc).
...
- 85
7
votes
1
answer
1k
views
Specifying PROJ.4 projection with North pointing down?
I would like to create a world map "upside down", with the South on top (in Mapnik).
How can I achieve this?
Can I take an existing projection string, e.g. Robinson projection, ESRI:54030.
+proj=...
