4
votes
0answers
607 views

How to find layer ID and name from Identify query using ArcGIS Web ADF?

I need to retrieve the layer ID of every layer returned by the IQueryFunctionality.Identify function (I am using ADF with .NET) Identify function spits out a DataTable array for layers which have ...
4
votes
0answers
777 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
631 views

How to use Route Task in Network analysis tools

I am using esri network analysis tool and I just want to draw the path between two clicked point on the map (by using route task) I use the example code block in the following link ...
4
votes
0answers
272 views

How to write a script to square polygon corners?

I'm looking for a script that will square the corners of polygons that are near 90 degrees but not exactly. Near could be dealt with via a variable, for example within 5 degrees of 90 (85 - 95 ...
4
votes
0answers
922 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
866 views

How to split kml file or extract Placemarks?

I have a file of state 2001 assembly districts outlines, from http://goo.gl/dJPyx in Mapinfo MIF format. I've created a kml file from that using ogr2ogr. These are the outlines of each assembly ...
4
votes
0answers
457 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 ...
4
votes
0answers
333 views

Trying to fill polygon fills the entire map

I have been given some shp files to be displayed using Mapserver. Until now I was able to find the correct projections, display the map, and show labels. However, I have problems with polygon colors. ...
4
votes
0answers
310 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 ...
3
votes
0answers
19 views

demers cartogram

How do you make a demers cartogram from a shapefile/topojson/geojson? I have tried scapetoad and indiemapper and i can not duplicate what you find on the links below. ...
3
votes
0answers
17 views

Adding an offset to a Leaflet TileLayer on the fly

I'm currently using Leaflet to display 18th century maps of Belgium as a base layer with a vector overlay of the present day road system. Although the maps are absolutely gorgeous ...
3
votes
0answers
12 views

How to use WEKA J48 classifier for satellite image classifications

Basically I am trying to build a tool from WEKA software using the J48 classifier for automatic satellite image classification to build landuse land cover maps. Could somebody please help, as I am not ...
3
votes
0answers
17 views

How to use real time data (traffic) for network analyst in ArcGIS?

I have a problem with using traffic data for routing. I'll describe the scenario: There is a local traffic service (real time) that has the speed of each segment in the network. This information is ...
3
votes
0answers
21 views

Are there any free live traffic layers for ArcGIS 9.3 MXD out there?

I am looking for free live traffic layers for a ArcGIS 9.3 MXD. My searches haven't been that successful.
3
votes
0answers
16 views

Intersection of a vector linestring and underlying DEM

Following is an screen-shot where ASTER DEM raster layer has been overlaid by a road linestring vector layer. I want to extract those DEM pixels which are lying exactly beneath the linestrings. I want ...
3
votes
0answers
24 views

How to snap and move circles by the center?

I have a point layer, and a polygon layer with buffers of a given radius around each point. I need to move points, and check that each buffer is not above forbidden land/plots. In autocad, you can ...
3
votes
0answers
16 views

3D distance and topography

I have a set of points and want to find out the nearest distance to a water body (poly lines) taking into account the terrain and get a surface distance calculation. I understand that the way is to ...
3
votes
0answers
41 views

How to create a python plugin in QGIS 2.4.0?

While I am learning to create a python plugin in QGIS 2.4.0, I have followed the proceedure expalined in ...
3
votes
0answers
26 views

Questions about SRTM , .hgt format and the sea level/coastline

What a nice place here ! The questions/answers system is very elegant. I have read and get some useful informations allowing me to write a little .hgt reader... I am working on C.G.I and create 3d ...
3
votes
0answers
27 views

Raising raster to a power gives no data values

When performing the following operation in QGIS Raster calculator: 10 ^ (("20091201_20100101_chl_modis_malvinas_ns@1" * 0.0000581)-2) I get no dada values for every cell where I should get < 1, ...
3
votes
0answers
16 views

What's the difference between coordinateDimension and spatialDimension?

The OpenGIS standard mentions three methods to query the dimensions of a Geometry: dimension(): the inherent dimension of the geometry: 0 for Point 1 for Curve 2 for Surface coordinateDimension(): ...
3
votes
0answers
36 views

How to extract elevation data Google Earth?

How do I extract multiple elevation values for a particular area in Google-Earth all at once? I've only been able to manually pick them one by one when I enter the long. and lat. for each point.
3
votes
0answers
34 views

Downloadable, Open Source, IP GeoLocation database

I have an open source project I need a similarly open source IP GeoLocation database for. i.e. IP address to country (and ideally city). Ideally with a license that allows redistribution. This is a ...
3
votes
0answers
28 views

At surface reflectance values

I have calculated at sensor reflectance for a multispectral image and preformed atmospheric correction. The reflectance values for the visible and NIR bands are between 0.2 to 0.01 for surface eg veg, ...
3
votes
0answers
36 views

Resampling air temperature gridded data to sub-grid resolution

I'd like to obtain a 30-m resolution gridded dataset of air temperature from the ~1km gridded data of WorldClim, of Hijmans et al., 2005) for a mountainous region. The easiest procedure (I thought ...
3
votes
0answers
26 views

Find Polygon in “Layer A” containing Polygon in “Layer B”

I haven't found yet someone with the same problem, so I'm posting a new question. The topic seems quite standard, so I'm sure there's a way to do it in QGIS. I have two layers: Region Layer Postcode ...
3
votes
0answers
17 views

Overwrite a table in CartoDB

I need to overwrite a table in CartoDB using the Import API, but the system instead of overwriting the table, it creates another one with the same name and attaches an id auto-generated. For ...
3
votes
0answers
39 views

How to detect temporal changes using ArcGIS?

I want to show urban sprawl in a city over ten year period. I took a MOOC on geospatial revolution, therein a link was shared to do such analysis. I just want to show the urban sprawl, nothing ...
3
votes
0answers
23 views

Overriding the QGIS Feature Dialog

We are developing a QGIS plugin and would like to override the QGIS Feature Edit Form with our own Dialog. Have explored using setEditForm and setEditFormInit, but the init process appears to want to ...
3
votes
0answers
69 views

Pulling ArcSDE feature classes from current map to fieldmapping as DETable?

I'm working with SDE layers in arcmap. trying to avoid pointing to the sde file itself. I've tried workspace.Pathname, it was empty for sde remote workspace. I've also tried IName from workspace, ...
3
votes
0answers
14 views

How do I drag item/file from ArcCatalog to custom UI form created with Toolbar Add-in?

I have created a button add-in in ArcMap that pops up custom UI/Form. I want to drag and drop file from ArcCatalog into the textbox on the Form. I am able to do so with windows explorer but not from ...
3
votes
0answers
44 views

How long should a delete identical take on ArcGIS 10.1

I have a 3.25 GB feature class of polygons with a spatial index. I am using the delete identical tool comparing the shape and one other field which contains a text string of 9 characters. The tool ...
3
votes
0answers
34 views

Is there a limitation on the numbers of layers that can be displayed in QGIS?

I have been looking for an answer to this question for the last several weeks, so hope that someone here has encountered the same issue and has a viable solution to my problem. I am currently using ...
3
votes
0answers
39 views

Default folder structure in ArcGIS for Server?

I'm very new to ArcGIS so I'll appreciate any pointers in the right direction, to documentation, etc. I anticipate having to develop a front-end for an ArcGIS server, and until it's ready I've just ...
3
votes
0answers
50 views

Extracting flow accumulation to stream shapefile

I would like to create a shapefile that displays the flow accumulation for a given point in a stream channel. Is this possible? My client wants a map that shows the accumulated flow/catchment area ...
3
votes
0answers
56 views

Problem with performance when loading PostGIS layer using pyQGIS

I'm having a question on loading a PostGIS layer into the project from my QGIS plugin. The code is like this: uri1 = qgis.core.QgsDataSourceURI() uri1.setConnection(str(host), str(port), ...
3
votes
0answers
65 views

How to change text legend orientation from right to left reading with arcpy

I working on mxd with ArcMap 10.2.2 . The default in legend properties-Layout is left to right reading (Marked with a red ellipse) : when it unmarked i get this legend: i want to know if there a ...
3
votes
0answers
24 views

Cost Path: multiple pairs of sources and destinations

I have seen many questions related to this problem but very few answers. I am very new to scripting and using ModelBuilder, but I am trying to calculate the cost path for 200 polygons with a single ...
3
votes
0answers
36 views

How to calculate an Illumination raster for fire ignition danger analysis?

I am doing a fire ignition danger analysis using this equation that I found in Millington (2012) http://www.jmecology.com/wp-content/uploads/2014/03/33-42-MILLINGTON.pdf IR = 4H + 3V + 2I – E Where: ...
3
votes
0answers
47 views

Wrong $area from field calculator (QGIS)

The area of the polygons in a layer, calculated by the field calculator with "$area" is wrong (much too big) for some polygons. If I draw the concerned polygon again, the area is calculated correctly. ...
3
votes
0answers
74 views

How to compute (X,Y,Z) of a point from given attributes

Is there a way to compute the geodetic coordinates (Earth Centered) of a satellite S(x,y,z). The original problem is to compute the footprint of an antenna, given the following information: ...
3
votes
0answers
49 views

Create vector grid from canvas using script

I've modified "Hex grid from layer bounds" script to my need. Just added cellsizex and cellsizey. Changed the hexagonal - 3 to "1" to make it as a square grid. Is it possible to include an option to ...
3
votes
0answers
39 views

ISOdata classifier in QGIS?

Is there a function that produces an ISODATA unsupervised classification in QGIS? The only unsupervised classification function I can find is a KMeans.
3
votes
0answers
35 views

Temporary File GDB-based scratch workspace is not deleted after it is released

I have created a temporary File GDB-based scratch workspace as follows: var factoryType = Type.GetTypeFromProgID("esriDataSourcesGDB.FileGDBScratchWorkspaceFactory"); var factory = ...
3
votes
0answers
28 views

How to calculate 90% confidence interval in a raster stack

I have a stack of grid files (23) in ASC format from a MODIS sensor and I need to calculate a 90% confidence interval, mean, min, etc, for each one in R, how can I do that? specially the interval. ...
3
votes
0answers
22 views

Connecting QGIS 2.x to Firebird Database via ODBC?

I tried to connect a Firebird Database in QGIS 2.2 and 2.4 via ODBC to a database and get following error message: Unable to initialize ODBC connection to DSN for SYSDBA/masterkey@Akdees ...
3
votes
0answers
67 views

Classified Images of RandomForest-Classification look clustered

I performed a RF-classification. I have 6 bands, ~250 trainingpoints in a shapefile, OOB estimate of error rate: 1.56% Picture of take trainingpoints added. My code: ...
3
votes
0answers
52 views

Performing buffering and intersection with script in PyQGIS

I wrote a script that performs the intersection of two layers: The first Layer -> layer1, represents the rivers The second Layer -> layer2, represents a set of circular dots distributed in a ...
3
votes
0answers
26 views

OpenLayers.Renderer.Symbols custom named by function

Is there any approach to define custom OpenLayers.Renderer.symbol by a function? For example, instead of making a symbol for each 3-pointed, 4-pointed, 5-pointed etc. star ...
3
votes
0answers
19 views

Processing for large scale networking animation?

I am looking to create an animation of network connections, something very similar to this: http://vimeo.com/16897839. Let's say I have a huge database (millions of rows), that includes source ...

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