4
votes
0answers
135 views

Plotting islands in ggplot2

I'm trying to plot bodies of water on my map and struggling with islands in ggplot2. I understand the right/left-hand rule for exterior/interior rings but there is still a problem going from island to ...
4
votes
0answers
53 views

Preparing data for semiovariogram analysis in ArcGIS with large sample sizes?

I am working on a statewide project to create surface water quality grids from point samples. In some instances, we have large sample sizes (n>50,000) which is problematic when creating ...
4
votes
0answers
240 views

How to digitize in stream mode in QGIS, using a tablet?

How to digitize in stream mode in Qgis, using a wacom cintiq tablet? freehand it's no use. i need something like MNDR stream digitizing extension for arcview 3.x, which allows continuous tracing, ...
4
votes
0answers
120 views

Merge Raster Layer Specific Order in Graphic Modeler

I'm using the Graphic Modeler/Processing Modeler to automate a process. The last step in this process is Merging three different Raster Layers. I'm using the "Merge Raster Layers" from Saga 2.0.8. Is ...
4
votes
0answers
323 views

How to set up graduated colors for a layer using ArcObjects?

I have to render a feature layer with a graduated colors renderer, using the ArcGIS API for Java (or VB, .NET). As the feature layer data is created dynamically using webservices, I don't in advance ...
4
votes
0answers
142 views

QGIS - assign different colors for SVG markers also in categorial / graduated symbols?

I understand it is possible to customize the color of an SVG marker via param(fill) However, I have to set the color manually, and cannot automatically assign it through categorical or graduated ...
4
votes
0answers
403 views

Hexagon binning using Google Maps

I have a bunch of geolocated points that I am looking to cluster on a google map using hexagons. These clusters will be stored in a db for quick retrieval and will be reduced to a single point and ...
4
votes
0answers
101 views

Adding data from PostgreSQL to Query Layer of ArcGIS for Desktop warns that given coordinate references are incompatible?

When adding data from PostgreSQL in a Query Layer I get the warning: The given coordinate references are incompatible I have added many other layers with the same properties no problems, but I ...
4
votes
0answers
98 views

QGIS - Auto-Update Color-Ramp to Current Display Extent

When displaying raster files in Qgis with the color-ramp stretched to the min/max values of the current display extent, the min/max values don't update automatically when zooming or panning to a new ...
4
votes
0answers
236 views

Problem with ImageMosaic plugin of Geoserver - invalid shapefile/tif missing in GetCapabilities

I'm trying to use the ImageMosaic plugin of Geoserver for raster time-series data (I followed this tutorial: ...
4
votes
0answers
90 views

Is it possible in QGIS print composer to include a numeric scale in an html box?

For work I always have to create a table with my name, project name, date etc. into my map layouts. I also need to include the scale like "1:150000" in that table. So far I am solving that by ...
4
votes
0answers
352 views

sql server spatial index performance

I have a table with around 2 million records in it. I create a spatial index, using the defaults other than the bounding box. I've been noticing that some queries are extremely fast, and some are ...
4
votes
0answers
545 views

Convert land-based camera image pixel x,y to ground lat/long or x,y,z

I have a number of cameras at various known locations (x,y,z) and directions that are above ground about 20 feet pointed at different ground locations about 100 feet away from each camera, and whose ...
4
votes
0answers
500 views

Hibernate Spatial - 'Invalid endian flag value encountered' Exception

I'm trying to run a simple query in Hibernate Spatial 4.0 on PostgreSQL 9.3. I have a number of objects in a table with latitude/longitude values, and I'm trying to query objects that fall within a ...
4
votes
0answers
3k views

Error when register database with ArcGIS server

I am using Arcgis 10.1(x32) and I have successfully connect postgresql(x64) as geodatabase. When I try to register database with Arcgis server 10.1(x64), I followed the instruction on the esri' ...
4
votes
0answers
419 views

Can GDAL Perform Vertical Transformations?

Can GDAL perform vertical transformations? If the answer is yes, please indicate which amongst these listed pages can explain how exactly to accomplish vertical transformations? If there is some ...
4
votes
0answers
237 views

How to repair Geometric Network in Versioned ArcSDE Geodatabase?

Our Versioned ArcSDE workflow has a feature dataset with Geometric Network in the parent (Default), which users derive in their own versions. It is now observed that in some versions, the geometric ...
4
votes
0answers
781 views

How to programatically set default Geodatabase and Workspaces for a map document?

I have a QC process that has a bunch of models that need to be sequentially run, and then the results manually inspected between each model. I know how to manually set the default GDB for the Map ...
4
votes
0answers
209 views

Use ArcPy to identify annotation reference scale?

I would like to retrieve the value of an annotation feature class reference scale using ArcPy (under ArcGIS 10.1). I cannot find where this property is stored (tried to access using the describe ...
4
votes
0answers
476 views

Extracting x,y,z values from a postgis linestring to python using ogr

I am trying to load a postgis linestring into python (using ST_DumpPoints) and extracting x,y,z coordinates, which is working but extremely slow..and if i mean slow, i really mean it (yes, it takes ...
4
votes
0answers
451 views

Creating Shapefile spatial index programmatically in .NET?

I am creating a shapefile programmatically using DotSpatial using the following example syntax / pseudo code FeatureSet features = new FeatureSet(DotSpatial.Topology.FeatureType.Polygon); ...
4
votes
0answers
263 views

Building larger polygons from smaller ones *without* common ID in PostGIS?

I am looking for a method, using PostGIS, of reconstituting a set of polygons from tens of thousands of smaller polygon 'pieces'. This is a simplified example, with the pieces shaded: ...
4
votes
0answers
1k views

Bearing/Course/Heading in WGS84 ellipsoid model

There is a common formula for computing the initial bearing for a course from lat1, lon1 to lat2, lon2. (And yes, I'm aware that the course will change when traveling). atan2( sin(lon2-lon1) * ...
4
votes
0answers
235 views

Proj4 inconsistent longitude after projection

All coordinates expressed in this question are (longitude, latitude), the default for proj4. London is at (-0.1460838, 51.5170986), and San Francisco is at (-122.419302, 37.775549). According to the ...
4
votes
0answers
262 views

PostGIS 2.0 st_geomfromgml using LineString fails with invalid GML representation

I am attempting to insert a geometry into a table using the st_geomfromgml function. The GML is being sourced from a Geoserver WFS request. The function call looks like this ...
4
votes
0answers
3k views

How to use Scale tool when Georeferencing Raster in ArcMap?

I'm georeferencing a bunch of maps in ArcMap 10.0. The Shift and Rotate commands are pretty easy to use, no problems there. But whenever I use the Scale command, the image completely changes ...
4
votes
0answers
341 views

Renaming Columns in Geotools FeatureType

I am attempting to build a simple java program that loads shapefiles into a Postgis 2.0 database. Everything is working out great except that I would like to be able to modify the FeatureType in the ...
4
votes
0answers
302 views

How do I clip Geojson FeatureCollection with another Geojson polygon

I have a GeoJSON file that contains one FeatureCollection with a bunch of features that are polygons. I also have the boundary of the continental USA in another GeoJSON file. I'd like to clip the ...
4
votes
0answers
705 views

Open shape file in ArcGIS Runtime WPF SDK as Graphics/Feature layer

I googled and followed this tutorial http://www.arcgis.com/home/item.html?id=953a530ada30477d95cc69e788268bc9 and figured out how to import Shape files and Rasters into Runtime. However, it seems ...
4
votes
0answers
203 views

create minimal spanning tree using table of distances between nodes rather than TSP

I am working on a transportation (linear programming) problem. Each potential solution also requires checking the distance of approx 20,000 routes with 5 to 15 nodes per route. Calculating the ...
4
votes
0answers
2k views

problem with saving to esri file

I was using Wroclaw 1.7/GDAL 1.9(earlier release)/Grass 6.4/GSL 1.15-2 and started getting the following message when saving any item to esri format. "Export to vector file failed. Error: creation of ...
4
votes
0answers
225 views

How to make a visual realistic map containing mountain hiking trails/tracks?

I would like to try making a map that visually reproduces a mountain/hill and contains hiking trails, just like this one: http://i.stack.imgur.com/PdcnM.jpg I imagine some steps like this: Generate ...
4
votes
0answers
338 views

Display a color ramp legend (of a vector layer) in the qgis map composer

I would like to have a color ramp instead of 10 categories of color when displaying my vector layer in the map composer of QGIS. Is it possible ?
4
votes
0answers
752 views

How to modify the edit widget in ESRI flex viewer 3.0?

I am running ArcGIS Server 10.0 (sp2) on Windows server 2008 64-bit with IIS 7. I am using the ESRI flex viewer version 3.0. I have created a feature layer and published it as a rest service and ...
4
votes
0answers
183 views

Create a filter for an attribute having multiple values

I am new to WFS and am trying to create a filter to get all the features that have their basename = "XYZ". The structure of a single record is as: <gml:featureMember> ...
4
votes
0answers
130 views

What is the structure of Standard Interchange Format (SIF) used by spatial data providers?

What is the structure of Standard Interchange Format(SIF) used by navteq and other spatial data providers? Any documentation/sample files? Is there a SIF parser available in C/C++/Java/PHP ?
4
votes
0answers
98 views

How to set ArcMap 10 attribute dialog split orientation to horizontal by default

When you open ArcMap 10, and open the attribute window (editor toolbar), the attribute dialog is split vertically. You can press the toggle button to split the dialog horizontally. I always use it ...
4
votes
0answers
700 views

How to sort a SimpleFeatureCollection using GeoTools?

I have a featurecollection: SimpleFeatureBuilder featureBuilder = new SimpleFeatureBuilder(dbFeatureType); SimpleFeatureCollection collection = FeatureCollections.newCollection(); while ...
4
votes
0answers
386 views

How to debug Quantum GIS PlugIn Visual Studio DLL?

I have developed a Quantum GIS plugin layer using Microsoft Visual studio and placed it in my plugins folder of my customized QGIS application. I now intend to debug the DLL using Microsoft Studio. ...
4
votes
0answers
258 views

Is it a bad idea to use a geometric network for road editing?

I am producing a road map (for print and online). I was thinking of using creating a geometric network with my roads, for editing purposes mainly, but I would like to know any critical downsides of ...
4
votes
0answers
228 views

Is PgRouting DARP Function still being supported?

I'm asking this, because I need some tool to solve a DARP problem. After researching I found PgRouting had included this functionality in one of its branches. But after installing it, getting stuck ...
4
votes
0answers
667 views

How to save table from PostgreSQL to MapInfo File?

I have two tables: 1 with geometry in WGS 2 with geometry in Local System I tried this: ogr2ogr -f "MapInfo File" output2.tab PG:"host=localhost user=postgres password=123456 dbname=postgis" -sql ...
4
votes
0answers
724 views

How can I properly add PostGIS data into MapGuide Maestro?

I am having trouble connecting a PostGIS database to MapGuide Maestro. Actually, I have added the PostGIS data into Maestro, but when I click to validate the layer it shows an error message: ...
4
votes
0answers
1k views

Map printing using ArcGIS silverlight API

I am using a GP task to print my map and its legend. Well it works fine. But it is really slow. Also I am not able to print the route event layer that I create. It does not show on the map. Please ...
4
votes
0answers
322 views

Can GeoTools parse GML CRS definitions?

A kind of branching of this question. Soon I will need to handle GML Coordinate Reference Sysyem definitions in a Java servlet. Links: GML OGC reference. Concrete example. I know that GeoTools ...
4
votes
0answers
5k views

Populate an existing popup with an AttributeInspector after RelationshipQuery returns results

Here's the workflow: A user selects a feature layer polygon, views a popup. A link added to the popup will run a RelationshipQuery to view related records. How can I get the RelationshipQuery results ...
4
votes
0answers
908 views

OpenLayers: WFS request to GeoServer to retrieve “name” & “featureNS”

Using WFSGetCapabilities I sent a GetCapabilities request to GeoServer. From the result of WFSGetCapabilities().read(), I can loop each featureType and retrieve some basic info(e.g., name, title, ...
4
votes
0answers
898 views

HRESULT E_FAIL error when doing batch geocoding in ArcObjects

I am trying to write a batch geocoding application in ArcObjects/C# and keep getting the meaningless "Error HRESULT E_FAIL has been returned from a call to a COM component" error (error code ...
4
votes
0answers
1k views

FeatureLayer SaveEdits failing

I've created a layer which I have bound a DataFeatureForm. Everything is working hunky dory, up to the point where I try to call the layers SaveEdits method in the EditEnded event. When I call this ...
4
votes
0answers
664 views

Why doesn't the gml 3.1.1 schema validate with xmllint?

Running xmllint on the gml 3.1.1 schema fails, even though the release notes claim that this release was created to get the schema to validate using 'common tools'. There's questions about this on ...

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