2
votes
1answer
559 views

Select by attributes within the fiona Python module

Is it possible to select polygons from a shapefile based upon their attributes using the Fiona Python module? I can't seem to find anything in the docs, but it seems like a strange thing not to be ...
2
votes
1answer
454 views

L.esri.featureLayer shows up and sometimes not

I'm new to the leaflet/esri subject so please forgive me if it's just a simple question. I wrote my first webmap-app. It uses different sources. The main aim is to show two basemaps hosted by MapBox ...
2
votes
1answer
142 views

Coloring multilinestringzm M values in QGIS

I have output from a geophysical technique that produces X,Y,Z and scalar value for millions of points, which have been stitched together appropriately (by networkx if it matters) into ...
2
votes
2answers
930 views

GDAL Conversion of US Topo GeoPDFs

I've used GDAL_translate with "--config GDAL_PDF_LAYERS" option to convert US Topo GeoPDFs to GeoTIFF and it works great for creating collarless topos based on the new format. However, I can't get it ...
2
votes
1answer
254 views

Loading tile zoom level 20

I have local tile also 20 level. I found out that OSM tile level 20 don't loading. map code: map = new ol.Map({ target:'map', renderer:'canvas', view: new ol.View({ projection: 'EPSG:3857', ...
2
votes
1answer
3k views

PostGIS Column has Z dimension but geometry does not

I am able to create a geomtry column for 3d multiline using this: CREATE TABLE trajectories ( gid serial NOT NULL, vehid character varying(10), state integer, geom geometry(...
2
votes
1answer
773 views

What's wrong with my expression to control label colors?

I am struggling to alter the label colours according to field values (as strings) in the attributes table. In my mind what I want is: If the string in column X = 'Proposed' Then label the point ...
2
votes
1answer
184 views

Databases supporting intersection of multipolygons and a set of points

Currently we use PostGIS to store thousands of MULTIPOLYGONs and we can then use ST_Intersects to return any that rows contain any point in an input collection of points. Are there any other open ...
2
votes
2answers
2k views

How to calculate volume from a raster file?

I have a raster file containing the depth of water. I need to find the volume of water using that raster file. I need to find the area of each cell and multiply with the depth. How can I do it in ...
2
votes
1answer
1k views

QGIS Google Maps Coordinate System

I have some Points in Shapefile with BC Albers Coordinate Syetem and I need to Project them to Google Maps Lat and Long. I tried to do this by using WGS 84 / Pseudo Mercator EPSG: 3857 and ...
2
votes
1answer
425 views

How to delete points which are close to each other?

I have a vector file containing thousands of points. Where points are within x distance from each other, I wish to delete one of the points and keep the other (either by snapping to one point, or ...
2
votes
1answer
1k views

How to solve an “Error found when retrieving conflicts.” error in ArcMap?

I uncovered this error when testing ArcMap 10 SP2 for a customer: This occurs when the conflict is detected--ArcMap is attempting to show the conflicts window but fails. I get this error on all ...
2
votes
0answers
162 views

Install Georeferencer Plug-in QGis 1.7.0 OS X

I'm trying to install the Georeferencer plug-in in QGis 1.7.0 on Mac OS X (10.5.8). However the plug-in doesn't show up in the list. I have used "enable 3rd parties directory" and I have checked "...
2
votes
1answer
85 views

Is there a way to integrate my own custom tools into the Processing toolbox in QGIS?

Is there a way to integrate my own custom tools into the Processing toolbox in QGIS? I believe I have found where to strategically hack the stock processing scripts to ensure it picks up my custom ...
2
votes
0answers
190 views

GeoDjango order_by('distance') not working as expected?

Using GeoDjango, I am trying to sort a list of users based on the distance from a point. It does generate a list, but its not ordered by distance, though I specify that in my query. This is the query ...
2
votes
2answers
902 views

Zoom to see entire MapLayer in Bing Maps

If I have a MapLayer that I'm applying to Bing Maps where I have a list of coordinates, how can I zoom to see the full MapLayer (dynamically zoom to the proper size) and toggle between seeing the ...
2
votes
2answers
180 views

QGIS failing to complete clip or intersect

I have been trying to perform a intersect (then tried using clip) on a rather large dataset on QGIS. I have been able to complete similar geoprocessing using slightly smaller datasets and the layer. ...
2
votes
2answers
595 views

vb.net arcobjects spatial query get fields value of desired layer only

Currently I am using ArcObjects (10.2.1) in vb.net (vs 2012). What I intent to develop is a spatial query tool. There are 2 steps in the function: (1) Use "Select Features" tool in ArcMap to select ...
2
votes
1answer
914 views

How to find area of Digital Elevation Model above/below a reference plane?

I am using ArcGIS10. I need to find the out the area which is below 5000 and above 5000 from the Digital Elevation Model which is available to me. How can I find out this ? My DEM ranges from 8848 to ...
2
votes
1answer
2k views

OpenLayers3 Redraw MAP/Refresh

I created a function to search for php to postgis and believe me that this function a file with the coordinates in the search GeoJSON format. The problem is that when I do rendering the map and add ...
2
votes
3answers
78 views

Is there a website in which I can do geoprocessing online?

Is there a website in which I can do geoprocessing online? I know there are a lot of sites that allow the visualisation of your data online or some basic map-making, but I need something more... Kind ...
2
votes
1answer
245 views

osm2pgsql Ways importing very slowly in .pbf, much slower than .osm

I'm currently importing the planet-latest.osm.pbf file I downloaded from ftp://ftp.spline.de/pub/openstreetmap/pbf/planet-latest.osm.pbf some time last week. I'm importing it using the following ...
2
votes
1answer
738 views

How to add label to QgsVectorLayer by Python

my goal is to define label programmaticly for the case similar for the figure below: But didn't find any guidance how to do so using Python. I have a feeling it could be done using QgsLabel but ...
2
votes
0answers
245 views

Validate a gml file

I receive a gml-like response from a RESTful Web service. It looks good for me but I can not imported in QGIS. Is there an online validation tool for a valid gml file? Or am I missing something for ...
2
votes
2answers
174 views

Choosing country projections

Anyone know of a good reference (either pay or open-web) that details recommended country projections?
2
votes
1answer
177 views

SDO_Inside equivalent in PostGIS for 3D objects

I am looking for a solution for querying a point whether it is located inside a 3D object or not. If the point is located on the surface of 3D, I could use ST_3DIntersects or ST_3DIntersection. But, ...
2
votes
1answer
67 views

Issue rendering polygons at global scale when using the Robinson coordinate reference system in QGIS 2.10

I am trying to create a map using the Robinson coordinate reference system (EPSG:54030) in QGIS 2.10, on Mac. I used the 'on the fly projection' feature in the Project Properties. My base layer is a ...
2
votes
1answer
190 views

Setting coordinate systems in QGIS: “transform error caught”

I'm learning how to use QGIS (v 1.8.0 "Lisboa") on Mac OS 10.6.8. My goal is to create a simple county map of Illinois using the base data shapefiles available from the Illinois Natural Resources ...
2
votes
1answer
1k views

Exporting geodata from QGIS to Esri File Geodatabase?

For a project I need to create a set of vector data that I think I could do in QGIS. However the customer demands that the final data set needs to be delivered in a Esri File Geodatabase. Is there ...
2
votes
1answer
80 views

ArcGIS layer format

am I correct in saying that the ArcGIS layer format for styling maps (*.lyr) is not an OGC approved format? And this is the reason that QGIS cannot read the *.lyr files? Thanks Antonio
2
votes
0answers
125 views

How to make a model with more than 2 input layers for buffering and merging?

Would it be possible to add more inputs to Buffer and Merge? From what I can see there is a limit of two input layers per both. As far as I know this is possible in ArcGIS's Model Builder but from the ...
2
votes
2answers
914 views

Exporting polygon shapefile with lat/lon points

By copying rows of the attribute table of a polygon shapefile, I figured out how to extract the points of the given polygon but to my surprise, they are formatted backwards: POLYGON(( -87....
2
votes
0answers
467 views

QGIS 2.4 Processing (Zonal Statistics) error

In QGis 2.2 all my models (processing model builder) are working fine. When I start the same models in 2.4 I get errors like this: Prepare algorithm 5: Zonal Statistics Running Zonal Statistics [...
2
votes
1answer
238 views

Cross-validation of TPS and kriging outputs from the fields package in R

I am looking for existing package or functions that will allow me to cross-validate multiple outputs of Thin plate spline (TPS) and Kriging from the fields package. Does anyone know of any available ...
2
votes
1answer
420 views

How can I convert a csv file of WKT data to a shape file using QGIS 2.01

Is it possible to create a Shapefile directly from a csv WKT file in QGIS 2.01? WKT POLYGON(...) POLYGON(...) Save as shapefile doesn't seem to work. Thanks!
2
votes
0answers
36 views

A small map take so much place and time?

I am using TileMill and try to generate an MBTile from Lyon in France. Doing so takes me +100GB and an incalculable time (25mb for a really small portion of Lyon take me 1h) Is it normal ? Does that ...
2
votes
2answers
417 views

How to do the loop when using GRASS module r.water.outlet?

I have seen this post:Watershed Analysis with GRASS, and I have a .txt file which contains coordinates of many points, and I want to use r.water.outlet to get basin area of each point. I type the ...
2
votes
2answers
1k views

Why do I get wrong length using STLength on MultiLineString?

I have 2 MultiLineString representing the a route (first is driving there and the second is the return way) . MULTILINESTRING ((34.787315938035292 31.318235314177119, 34.788431415005249 31....
2
votes
2answers
3k views

How to switch Map Units on Data Frame Properties back to Feet in ArcMap?

Using ArcView 10.1, I can not switch the Map (Units) nder Data Frame Properties to Feet. It is currently at Decimal Degrees. Display can switch. How do you switch it back to Feet?
2
votes
1answer
302 views

Layer properties dialog in my QGIS plugin

I am developing a plugin which should display some information like geometry of the layer, feature count etc. Now those are currently displayed in QMessageBox.information. I want it to be displayed ...
2
votes
1answer
3k views

ArcGis 10 interpolate Z between polyline's vertices (IZ.InterpolateZsBetween ?)

Here's what's happening: I want to create a 3D line using only the height of some GSP points. I need to be able to extrapolate the vertice's height between where it's known to the one where it's ...
2
votes
1answer
599 views

How to auto-update WFST store with GeoExt/Openlayers?

I built an WFS-T with a grid panel (Ext.grid.EditorGridPanel) to edit features' attributes. Now, I want the feature store (GeoExt.data.FeatureStore) to reload/update automatically so that other users ...
2
votes
1answer
134 views

Does CartoDB support alphabets other than Latin?

Does anyone know if CartoDB supports alphabets other than Latin? I'm trying to upload some data with Cyrillic characters but have had no success.
2
votes
3answers
1k views

Transforming Visio polygon to shapefile?

I am a complete newb at this stuff and don't know what I don't know. I may use incorrect language. Essentially, I want to convert the shapes in a Microsoft Visio diagram into a shapefile. I pretty ...
2
votes
1answer
254 views

Python-gdal create geotiff from array with colormapping

I am creating grayscale, single channel geotiff files from numpy arrays with the below module, but I would like to apply a fairly standard colormap to the data. I've tried three channels of R,B and G ...
2
votes
1answer
2k views

Add TMS layer to OpenLayers

I have found some examples but haven't managed yet to adapt them to my needs... I have an image that is served as TMS (tiles already statically rendered): http://humadat.alwaysdata.net/tms/khorog/...
2
votes
1answer
988 views

Is there lat/lon grid option in QGIS?

For example, I have georeferenced layer loaded and I want lat/lot grid or at least some ruler in QGIS display canvas, to suite me as a helper. It looks like only reference is cursor tracking in status ...
2
votes
1answer
350 views

Point count within borders, in two different layers, using QGIS

I have a layer of georeferenced points, and a layer of vectorized borders. Is there a way I can use QGIS to calculate how many points fall within each area of the borders layer?
2
votes
2answers
1k views

Why is Format of output data grayed out on Save As dialog for Rectify?

I started georeferencing and I could not save my new "rectify" file, I don't know if is because of the raster or I did something wrong. Then I find out that my control layer is not accurate, it doesn'...
2
votes
3answers
481 views

Is it possible to make a routable graph from Polygons?

I would like to know if it is possible to make a graph with pgrouting 1.05 on polygons. What I mean is that I have to make a graph on a database without roads but with polygon geometry. I would like ...

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