3
votes
0answers
80 views

arcpy.mapping.ExportToTIFF fails to render layer?

Has anyone else had this problem? I have an mxd file with two layers in it, one of which is fairly 'heavy' (i.e. takes a minute or so to draw). All layers are visible by default. I have the ...
3
votes
0answers
33 views

Generate a series of ellipses on a line

I am trying to create a series of ellipses (mocked up in green below) of defined dimensions along a line. I have got as far as generating regularly spaced points along the line that are attributed ...
3
votes
0answers
241 views

Select and copy attributes features in ArcMap using Python add-in tool?

I'm trying to add a tool to an add-in toolbar to select features from an existing feature class and copy attributes to another feature class,from point to point. TopoHeight_Field_Name='Comment' def ...
3
votes
0answers
111 views

Does QGIS work with Anaconda?

I am trying to get QGIS to work with the Anaconda distribution of Python but I do not know how to get this to work. In one of the answers it was mentioned that QGIS does not work with Anaconda and I ...
3
votes
0answers
103 views

How to set Vertical Coordinate system when creating a 3D shapefile?

I'm working with GDAL v1.11 and am seeing the vertical CS stripped when exporting a 3D shapefile (from oracle spatial). This is the command I'm running: ogr2ogr -f "ESRI Shapefile" B_POINT.shp ...
3
votes
0answers
164 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 ...
3
votes
0answers
108 views

Single Tree detection

I was wondering how I could extract "crown area" of single trees in a forest from a high-resolution image with only 3 band (RGB) in ArcMap. ( No NIR to use NDVI as any threshold). I need a fast ...
3
votes
0answers
30 views

Need to run a Groundwater Analysis Based on Points to a Raster

The title sounds daunting, but this task really isn't. I have well samples over a decade in certain locations through an area. These samples contain a value of that element at that point in time. I ...
3
votes
0answers
90 views

Most efficient way to intersect overlapping polylines

I have 4 multipart polyline shapefiles (download a sample dataset here). The geometries are identical, except for the length of segments in each shapefile. They represent 4 variables describing an ...
3
votes
0answers
64 views

Both-sided transparency in ArcScene for extruded features

I'd like to extrude my polylines and make them transparent, but from both sides. As you can see below, the transparency works only on one side. I think it's something with the side-orientation. I can ...
3
votes
0answers
75 views

Geoprocessing tool for finding specific point within polygon

I have a ArcGIS task and cannot find a solution. I try to find a certain point within a polygon (see picture). This example is handmade and I need a geoprocessing solution I point I try to get is ...
3
votes
0answers
51 views

Elevation interpolation along a (sewer) line

Here's what I want to do. I have a vector sewer line feature class that contaings a field for the high invert elevation and one for the low invert elevation. I can turn them into a raster no problem ...
3
votes
0answers
74 views

Postgis database query optimisation

I have a set of rasters in DTED format which I load into postgis database using raster2pgsql command line tool. Each of rasters is simply stored in a row and described by rid and a value of raster ...
3
votes
0answers
62 views

How to set up a base station without known coordinates

I am new to surveying, but need to set up a Topcon controller with Pocket 3-D to run 2 receivers and a grader running off the base receiver for my new job. It sounds stupid, because I can't seem to ...
3
votes
0answers
178 views

Open Trip Planner rest api request

following this tutorial I set up a Open Trip Planner (version 0.11.0) stand alone server. It works very well at http://localhost:8080/index.html and for example at ...
3
votes
0answers
40 views

Loading raster data into postgis database

i would like to add raster data to my postgis database. when i try to check if postGIS is responding to requests using the following command psql -c "SELECT PostGIS_Version()" ,i get an error message ...
3
votes
0answers
171 views

Formula for maximum coverage of a geostationary satellite based on earth station elevation

I am trying to create a javascript function to represent the maximum coverage of a geo satellite for different antenna elevations (0 degrees, 5 and 10 degrees) with 3 leaflet polylines. The result is ...
3
votes
0answers
26 views

How can ASTER elevation data be converted to a CAD model

I am trying to convert ASTER elevation data to a 3D CAD model using only opensource software. I have tried using different file formats but I have been unsuccessful. I use QGIS for my GIS work and ...
3
votes
0answers
56 views

Rotate map with dynamic display layer?

I am developing an application using the dynamic layer. However, I have trouble rotating the map (Not the same as rotating data frame by default). See more details: ...
3
votes
0answers
178 views

How to use Python's subprocess module in a for loop ArcGIS?

I am new to scripting with ArcGIS. Although this might be an easy thing for those that know Python well, I haven't figured out how to use the subprocess module in a script. I actually think I'm ...
3
votes
0answers
270 views

Understanding Error network dataset has no edge elements It may be unbuilt?

I'm trying to alter an Integrated Transport Network (ITN) to remove all of the roads that are within a flood zone (a separate shapefile). The ITN Network Dataset I'm working with was created by ...
3
votes
0answers
39 views

Distortion in projected raster

I am having a frustrating problem with something that I think should be very simple. I have a number of DEMs from the National Elevation Dataset (NED), that come standard in the NAD83 coordinate ...
3
votes
0answers
58 views

ArcGIS Silverlight API - Use POST instead of GET

Is there a way to get queries performed using the ArcGIS API for Silverlight to use POST instead of GET? I'm trying to pass in a geometry which has too many vertices for the character limit.
3
votes
0answers
62 views

Lake Victoria bathymetric data

I am trying to find bathymetry for Lake Victoria (or portions). Any GIS format and almost any resolution will do. As a last resort a hydrographic chart will suffice.
3
votes
0answers
57 views

how can i save a satellite raster image as a layer file in arcmap 10.2

I am trying to save a raster satellite image from esri world imagery as a georeferenced layer file. i still want to be able to zoom in and out as i can when veiwing it through the server.
3
votes
0answers
123 views

Data Driven pages, printing from mapsets not working, ArcGIS Desktop 10.2.1

Well, it's almost a year on from when I first asked this question on the ESRI user "forum" - Data driven pages, ArcDesktop 10.2.1 - is there a limitation on how many pages can be printed? ESRI tech ...
3
votes
0answers
64 views

Create a Shape file from Sql dump file

I am trying to map data by querying a table called xyz. I need to show the the_geom data on the map. I have below query in my mapserver .map file: DATA "the_geom from xyz using unique id using ...
3
votes
0answers
66 views

Where do I find official summit elevations found on USGS topo maps?

I'm creating topo maps for my day hikes guides for national parks. I've already done one for Glacier National Park. When I was working on summits, I downloaded the data for Montana from GNIS and when ...
3
votes
0answers
77 views

How to perform mass-balance analysis with ArcHydro

I was wondering if there is any online manual/instruction for carrying out water mass balance analysis using ArcHydro? I have searched for such information, and the closest thing I can find is a ...
3
votes
0answers
83 views

Lining up polygon legend patches in ArcGIS for Desktop?

I have tried the properties and everything, I cant understand why my polygons are not lining up correctly in the legend. I created this legend the usual way by adding my 3 layers to the legend wizard ...
3
votes
0answers
31 views

Select stream network within a fixed distance from a point

Is there a tool out there that would allow me to select a portion of stream network that is within a fixed distance from a specific point on that network? In the example below, there is an ...
3
votes
0answers
85 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
94 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
139 views

ArcObjects Memory Leak with IWorkspaceEdit?

I have ArcGIS 10.1 installed. I have created a function for copying all of the features from one shapefile to another using IFeatureBuffer, now every time the function when it is called, it takes ...
3
votes
0answers
103 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
71 views

Sourcing free live traffic layers to use in MXD of ArcGIS Desktop?

I am looking for free live traffic layers for an ArcGIS Desktop 9.3 MXD. My searches haven't been that successful.
3
votes
0answers
73 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
107 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
143 views

Batch export to shapefile by attribute field in QGIS

I have a project in QGIS where I am creating a map of plants over a large area. I want to take the "Genus" field (of which there are 100 hundred values) and essentially create 100 shapefiles based on ...
3
votes
0answers
28 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
57 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
447 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
463 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
66 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
50 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
47 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
93 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
25 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
54 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
48 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 ...

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