0
votes
0answers
14 views

Multiparts and Multigeometries: checking for multigeometries with PyQGIS?

I have been working with PyQGIS and writing a small script to check whether the layers I have in the MapCanvas have geometries of type "MultiXX" because I want to run the "Multipart to Singleparts" ...
0
votes
0answers
8 views

QGIS - OSM Place Search

I am new to QGIS and trying to follow http://www.qgistutorials.com/en/docs/downloading_osm_data.html But I am stuck as I do not have (1) Plugins/OSM Place Search (first picture) (2) OSM Place Search ...
0
votes
0answers
12 views

How to cut a polygon without snapping to a vertex?

I am familiar with editing polygon files in QGIS version 1.8. I have recently upgraded to version 2.0 but there seems to be a difference in the way it processes cuts. I used to be able to cut a ...
0
votes
0answers
14 views

How to rasterize a point layer? Cell value should be 1 if feature attribute is 1

I’m a fairly experienced GIS user, but I’m new to QGIS. I’m using version 2.2, and I’m trying to convert a point data layer into a raster data layer using the Rasterize tool. The point data layer has ...
0
votes
0answers
30 views

Leaflet + proj4js + EPSG:2180

I'm trying to add a WMS layer in EPSG:2180. I get the definition for EPSG:2180 from here and I am using this guide on GitHub to make a new CRS definition, but I think it is corrupted. It is not ...
0
votes
0answers
16 views

Min value (OD Cost Matrix)

I have an attribute table with columns that I have gained from running an OD Cost Matrix. In one column named "Total Minutes" I will select the lowest value (the shortest route). Then I will create a ...
0
votes
0answers
10 views

In QGIS Process Modeller, is it possible to automatically run a function on several layers without listing all combinations?

Trying to develop a Model which includes finding any intersections between layers and then merging them all into a single layer. I have 12 layers in total, it's not really efficient to list all the ...
0
votes
0answers
14 views

openlayers undoRedo and Ragbag of components library conflict

I am currently using this example (link below) for modifying feature http://jorix.github.io/OL-Ragbag/examples/modify-feature.html and now I'm trying to add functionality for undo/redo ...
0
votes
0answers
8 views

Connexion ODBC FilemakerPro10/QGIS 2.2.0

I try to establish an ODBC connection between a database FilemakerPro 10 and QGIS 2.2.0 software but I have some problems with installation. At first , I activated ODBC sharing my file in my Filemaker ...
0
votes
0answers
24 views

Reducing point numbers in a certain area

We have a list of poi data in our database(Access mdb db), and we have a web service which serve data by a specified BoundingBox. However we found that the returned points are too close to another at ...
0
votes
0answers
15 views

how to call click event on marker(may be a simple fill symbol elementt or picture symbol element) element using java arc objects

Hii I am new in GIS and java arcobjects. I have to call a click event on simple marker element on mapbean using java arc objects but i dont know how to do it. in my application I put approx 200 ...
0
votes
0answers
6 views

populate USSA and DSSA for Banks Layer in HEC-GeoRAS

georas and hec-ras for river flow simulation. . i was wondering why river banks do not have data to plot. when i click the bank and select "Edit Connection" it shows "No Data for Plot". .i run through ...
0
votes
0answers
14 views

Link GPS Data Logger to a website

Is there a way of linking GPS data logger to a self made website for tracking purposes? I want to create a tracking website which uses the data from GPS logger and connect to Google maps to show the ...
0
votes
0answers
23 views

How to calculate the area of an ellipse on the earth's surface using Python?

I have a dataset consisting of GPS coordinates. I use a clustering algorithm to generate a two dimensional Gaussian for me. The Gaussian takes the shape of an ellipse if visualized on the map. ...
0
votes
0answers
15 views

Is there a way to pass arguments to qbrowser?

is there a way to pass arguments to qbrowser? I was thinking that maybe one could use the QGIS browser as a simple shapefile viewer, but it would be nice if one could specify the folder/file it ...
0
votes
0answers
11 views

Layers change position when saving to another data format

When I save my map after using the composer, the layers move a little bit on the images of the OpenLayers plugin. It is like they ignore the CRS option. Do you have an idea?
0
votes
0answers
18 views

how to filter point features based on the filterted polygons with OpenLayers

I have one WFS polygon layer and one WFS point layer. The polygon layer has an attribute user_id. The web map has two requirements. Filter the polygons based on the attribute user_id. That is, a ...
0
votes
0answers
17 views

MSSQL Connection settings for QGIS

OK first lets get the blond elements out of the way- I'm not asking for how I connect to my actual database. What I'm asking for is an example or screen shot of the entries required when setting up a ...
0
votes
0answers
15 views

How to accurately join data based on 1x1 degree grid-cell points to a shapefile

In the data file each row represents a country and a grid-cell at 1x1 degree resolution, and the given coordinates, in longitude and latitude, label the south-west corner of the grid-cell. The ...
0
votes
0answers
26 views

calculate distance between points crossing the antimeridian

How can I calculate the distance between two points (lon/lat) if any of the points exceeds the antimeridian (+-180 longitude)? Im using the distVincentyEllipsoid {geosphere} to calculate the shortest ...
0
votes
0answers
19 views

Convert GPS to cartesian and scale to a bounding box

I've little knowledge about geographic systems and i'm gonna try to explain my problem the best i can. I've gps coordinates captured from a mobile device WGS84 store in a file, each file stores a ...
0
votes
0answers
22 views

OpenStreetMap Road and Polygon Data as 1x1 Degree Shapefiles

I am working on a global project for which I want to use OSM data as a model input. I am looking for advice on the best way to produce 1x1 degree WGS84 shapefiles from either regional extracts or the ...
0
votes
0answers
13 views

QGIS map tip / label showing a table

I have a MSSQQL Spatiatal layer with Point data (borehole locations, pointID) and a joint table lithology (soil info per borehole, pointID, depth from, depth to, constituent) Is there a way to use ...
0
votes
0answers
11 views

Can a joined-layer have its attribute changed depending on what layers are selected/deselected?

Using QGIS, I have a polygon-grid layer which covers everything, Layer_All joined with 2 other grid layers: Layer_1 and Layer_2, both of which intersect at various points. I would like Layer_All to ...
0
votes
0answers
12 views

display followers count on google maps using R

How can I plot the count of followers, locations wise on google maps- Im using R language my data is as below for(i in 1:25){print(friends_obj[[i]]$location)} [1] "London & Glasgow/Edinburgh, UK" ...
0
votes
0answers
6 views

Geomedia Objects Customization

I have created a form using VB.net based on Geomedia 2013. IN this form i have created a DATAGRID view in which i m able to see all the assets that are present in connected database with a click of a ...
0
votes
0answers
17 views

insertVertex giving false in pyQGIS

I have this code from my plugin which work in Qgis 1.8 and I am trying to make it work in 2.0. I want to insert a coordinate x and y into a polyline after the last entry. points = geom.asPolyline() ...
0
votes
0answers
9 views

Unable to execute pgsql2shp in php

I am able to execute the command using the command line. But when i use it in the php script, I am not able to ececute it. Could you please help me out on thi Using command line pgsql2shp -f p2 -h ...
0
votes
0answers
7 views

Credential Dialog, disabling default Realm information messages disclosing password

I'm using the QgsCredentialDialog for determining user access to the database. When a user is failing to log in correctly the log in credentials are shown in the dialog (Fig. 1). Despite the ...
0
votes
0answers
22 views

maintain different style for each feature in same layer

on feature selection, I am trying to change feature style of selected feature.so that assign different style to each selected feature that exist in same layer. I have done this successfully but when I ...
0
votes
0answers
9 views

Edit a classified grid file (.grc) to improve accuracy

I have a .grc file (classified grid file) which contains some clutter information, forest, sea, woodland, etc... I need to alter the data in some area to improve accuracy. Basically a larger forest or ...
0
votes
0answers
6 views

Cannot install node-mapnik on Windows 2008 x64

I have been spending the last few days trying to get node-mapnik running but with no success. Initially inspired by Wilhelm Berg's demo (https://www.youtube.com/watch?v=GlTaRpg3CbQ) which renders ...
0
votes
0answers
27 views

How to set raster values to NULL?

how can I define values to null? I tried it with the processing reclassify tool but I always get an error log (cannot open the result shape...or something like that).
0
votes
0answers
34 views

ArcGIS Engine, How to change IMarkerSymbol size in runtime?

I'm using ArcGIS Engine 10 with C# Winforms to visualize some elements on a globe control. All elements are of type IMarkerElement which have symbol of type IMarkerSymbol. Now I want to add two ...
0
votes
0answers
17 views

How to consume secured AGS services in Google Earth

I am able to easily consume unsecured AGS services in GE, but not secured services. I have created a KML Link in AGS Manager with no luck, and added the service manually as a link in GE with the same ...
0
votes
0answers
16 views

Openlayers - Many broken tiles with vmap WMS in EPSG:900913

I would like to use the vmap WNS (http://vmap0.tiles.osgeo.org/wms/vmap0) in an OpenLayers map. I encounter many broken tiles (pink) when using the srs: EPSG:90013 contrary to EPSG:4326 and that at ...
0
votes
0answers
25 views

How to (using OpenLayers) panTo/setCenter on a OpenLayers GeometryPoint

Xpost from Stackoverflow. First, I'm new to OpenLayers. The following is a snippet of HTML which represents a couple of images on a map rendered via OpenLayers. QUESTION: using the information below ...
0
votes
0answers
10 views

Is there an equivalent of QgsMapToolIdentify in QGIS 1.8?

I'm using quantum gis 1.8 Lisbon, and I need to select a point that is on the map by mouse, to know their attributes. But I can not use the QgsMapToolIdentify function, that would show me another ...
0
votes
0answers
41 views

Where can I get shapefiles for Indian Constituencies according to the latest delimitation?

The GIS data officially provided by the government is only available as PDF maps. Some people have shared shapefiles for the previous delimitation but these are outdated. Parliamentary constituency ...
0
votes
0answers
24 views

Is it possible pull multiple documents out of a geodatabase?

I am working on a sliverlight application in which a municipality will be able to view multiple assets for a water treatment plant within a GIS. Within this application, the user will be able to pull ...
0
votes
0answers
45 views

Acess control allow origin header is present on the request resource. Origin null is therefore not allowed acess

I'm trying to use the openlayers vector class. And the error occurred: Acess control allow origin header is present on the request resource. Origin null is therefore not allowed acess I've put ...
0
votes
0answers
15 views

KML Opacity Slider

I am trying to build a KML opacity slider, but I am unsuccessful so far. Based on this answer: http://stackoverflow.com/questions/20667722/changing-opacity-of-kml-overlay-in-google-maps-v3, I try to ...
0
votes
0answers
27 views

error:[RPC Fault faultString="Unable to complete operation..] intersect widget

I am trying to develop a intersection widget using the geoprocessing service. my geoprocessing service is as follows: I try to consomer this service in my flex application this is my code: ...
0
votes
0answers
26 views

Segmentation Image used to classify RGB image in ERDAS and GIS

My ERDAS 2013 does not have the advanced Image Objective Extension for feature extraction.. I am using thus the tool Image Segmentation (Unsupervised -> Image Segmentation) to classify my RGB image ...
0
votes
0answers
56 views

Converting a CSV to shapefile

I am attempting to load a CSV file into Qgis and ultimately convert it into a shapefile. I used Layer->Delimited Text Layer but the only options are for points, WKT and no-geometry. Neither of ...
0
votes
0answers
16 views

ArcGIS JavaScript problem with legend to show attributes

I'm running a geoprocessing task in my webapplication. When the task generated some results i destroy an existing legend and build up a new one that shows the legend for the resulting layers. That is ...
0
votes
0answers
17 views

Why are 10-bit linear feedback shift registers (LFSR) used in GPS?

The fundamental frequency of the GPS L1 signal is 10.23 MHz, which is related to the fact that the C/A code length is 1023 chips. This number comes from the fact that the codes are produced using ...
0
votes
0answers
7 views

project from mongodb to a map

Is there any way I can directly project my coordinates stored in mongoDB onto a map? Some sort of opensource tool like OpenJump or something, which would allow me to connect to mongoDB and extract ...
0
votes
0answers
9 views

Print overview map widget

I am using ArcGIS viewer for flex v3.6 to create a web map. Can someone tell me if it is possible to print the overview map widget as part of your map? P/s: I know someone asked this question 2 years ...
0
votes
0answers
23 views

How to raster vector- and shape-files correctly

does anybody know how to convert vector- and shape-files correctly? Doesn't work with tab Raster/convert/vector to shape files. The output always contains strange input-data (wrong and strange ...

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