0
votes
2answers
391 views

How do I modify features during runtime, in a GeoJSON feature group on Leaflet?

I have added some GeoJSON to my Leaflet powered map as below. (Altered version) var array_of_layers = L.layerGroup([]); var styleholder = []; var belgium_style = {color: "#d3e46f"}; var bosnia_style ...
0
votes
1answer
21 views

Split a line feature using nearby points

I have a line shapefile and a point shapefile, and the line has its own segments and its attribute table, the point shapefile has points near the line above, not on it and the close ...
0
votes
0answers
4 views

Most optimized way of extracting data from planet.osm

I want to cut extracts from planet.osm.bz2 . I have found this command bzcat downloaded.osm.bz2 | osmosis --read-xml enableDateParsing=no file=- --bounding-box top=49.5138 left=10.9351 ...
1
vote
0answers
12 views

My class using ogr to calculate distance is returning incorrect results away from the equator

in an answer to this question ustroetz kindly provided some sample code for use of ogr to do lat/lon distance and point in polygon calculations. I've created a Python class based on his example to do ...
0
votes
1answer
12 views

WPS Client implementation in our desktop

how to implement wps client in our system and also specify requirements needed. How to specify the proxy to the OpenLayers.ProxyHost = 'proxy.cgi?url='; var map, client, intersect, buffer; function ...
0
votes
1answer
13 views

Street index to CSV/Excel file

Anyone know how to generate a street index for a map with accompnaying page numbers that are data driven? I am use the toolbox for creating the street index but exports to PDF however I need it to be ...
-1
votes
0answers
25 views

Problem with Select By Location in ArcGIS 10.1

I've used Select by Location for years without issues and just used it earlier today without any problems. However, in the last hour or so I'm getting a pop up titled "Add List" and within it an ...
0
votes
3answers
247 views

storing images in mysql from WebGIS applications

I'm a complete amateur at writing code. I would like to make an application for storing LNG, lat, and other data, as well as images in mysql. I've set up, I made a separate application for storing ...
7
votes
1answer
1k views

Add layer to open mxd using ArcObjects from outside the map document crashes ArcMap

I have an Access database (MS Access 2010) that allows users to enter a variety of land treatment information including associated points, lines, or polygons which users can select and the database ...
32
votes
4answers
6k views

How to migrate from ArcGIS for Desktop to QGIS?

Our lab has about 10 projects in ArcGIS 9 (a couple are made in ArcGIS 10) that includes the following in each: A georeferenced (WGS1984 geographical projection) raster seafloor image, representing ...
2
votes
0answers
19 views

How to analyse point data as covariate for areal data

I have two data sets: a) a set of polygons with areal data variables. b) point measures of various co-variates of interest (note I do not necessarily have a point for each polygon) How do I ...
7
votes
3answers
464 views

How to use ZonalStats plugin?

I am using QGIS 1.8.0 on a Windows Home Premium 7 machine. I have a single band TIFF that is 187 MB in size. My vector polygon shapefile represents a regular grid of a 147x112 36kmx36km grid cells. ...
1
vote
2answers
31 views

How can I speed up these queries

I am trying to make some calculations using PostGIS and PostgreSQL. There are 3 important tables : wbn, wgo and wvb. These tables have about 500.000 objects in them (geometries). The problem is that ...
37
votes
4answers
5k views

Why has Web Mercator (auxiliary sphere) become the web map standard?

I understand what the difference is between the Web Mercator projection and Web Mercator Auxiliary Sphere (WMAS). I also understand that both Google and Esri have adopted this projection as their ...
1
vote
0answers
25 views

Is there general Earth Projection in ArcGIS for Desktop?

I'm starting a new personal project and I need a little bit of helping on setting it up. First off I'm trying to determine the area of a rectangle that is 1 mile in width and the circumference of ...
1
vote
1answer
21 views

Excel/Google Docs > Plss Map

Is there a way to map out PLSS (Public Land Survey System) TWP (township),RNG (range) and Section based off a field in google docs? I was thinking if you had your first column with the PLSS area in ...
0
votes
1answer
16 views

How to use DateDiff() Function across day transition in ArcGIS Field Calculator?

I am trying to calculate the time difference between two fields using the DateDiff() function in minutes. I have successfully calculated the times that fall within the same day but I am having trouble ...
0
votes
1answer
73 views

Convert PCIDSK file with seven layers to Geotiff without loss of layers

does anybody know a way to save a PCI Geomatica landsat file (PCIDSK, *.pix) as a Geotiff without loss of layers?? The Transferring layer function of Orthoengine does not work. With the export map ...
0
votes
0answers
10 views

How to display selected features in ArcGIS Identify Dialog using Visual Studio 2010/ArcObjects?

I'm brand new to ArcObjects SDKs and am struggling. I have a Python Add-in performing a query to select records (works great)and now trying to call the identify dialog via an .NET addin button that ...
1
vote
1answer
32 views

Can't find the toolbar for sorting the table of contents in alphabetical order in Arcmap!

I am using ArcGIS Desctop 10.0 Service Pack3 and I'd like to sort the table of contents in alphabetical order but following Sorting the table of contents in alphabetical order I can't find the ...
0
votes
1answer
36 views

Excel Nad83 table to gpx-Total noob

I have some waypoint locations that I have entered into a spread sheet in Nad83 the format of table looks like this NAME, -, -, UTM ZONE, Easting, Northing, -, Comment 1184236, 1, CP, 15, 451596, ...
2
votes
1answer
19 views

how do I reestablish all feature class references in mxd after their names change?

I have 200 shape files which have been named using an integer at the beginning of the name...i.e 01.03.shp 01.04.shp etc. They are all symbolized within an mxd document. I need to import these shapes ...
1
vote
0answers
34 views

Managing large number of catchments/watersheds

Does anyone know of an easy way to manage a large number (10,000's) of catchments/watersheds? I have defined a stream network and for each segment, I have a corresponding catchment (in a unique ...
0
votes
0answers
21 views

How to convert from Cartesian (X,Y) to WGS84 Lat Lon

Given that I know the origin and the x and y cartesian coordinates. How do I find the corresponding lat lon? lat = lat_origin + ((y / 1000.0) / (111.319 * rad_to_deg)); lon = lon_origin + ((x / ...
0
votes
1answer
58 views

Error with Python Script tool for ArcGIS 10.2

I am trying to create an ArcGIS map tool that includes creating TINS and uses parameters. This tool works fine when taking the data from shapefiles, but when I use map layers, which is what I want it ...
0
votes
1answer
94 views

Geodjango: Using Lat / Lon to Buffer from Point

I want to have a radius based distance search. To do this, I want to create a buffer around a point object so that I can filter objects that are inside this buffer, a method that I learned based on a ...
1
vote
0answers
30 views

How to replace data source of annotation feature classes using ArcPy?

I want to batch replace paths in a series of .mxd files using Python. Many of the layers have moved and in some cases the name has changed or its dataset is different. I've written this code which ...
3
votes
1answer
55 views

Can arcpy.env.workspace be set multiple times in same script?

Is it possible to set arcpy.env.workspace multiple times in the same script to ListDataFeatures from different workspaces? eg. import arcpy def readFromGdb(): arcpy.env.workspace = ...
0
votes
1answer
13 views

Calculate text field based on codeblock query of numeric field

I am trying to populate a field with a L/R bank designation based on a route measure (as part of a larger script), but I am struggling. I have a shapefile created (tir_pts_lyr), I have a blank column ...
0
votes
1answer
9 views

Getting Default symbology in a feature class with subtypes

I was wondering if there was a way to get default symbology in a GDB feature class with subtypes? I don't want to create a layer file for each feature class. Is there a way to have the symbology ...
3
votes
1answer
34 views

Python resource for remote sensing?

I am looking for a good resource (MOOC, book, etc..) to teach Python for remote sensing applications. I am already familiar with http://www.rsgislib.org/ - are there any other resource out there for ...
0
votes
0answers
10 views

how to apply adress-geotags

hello dear linux experts what i am trying to do now is .....a little task i wanted to run a osmconvert & filter with the following goal - to get the following tags out of the datas: ...
0
votes
1answer
77 views

need help with L.mapbox.legendcontrol

I am using mapbox.js 1.6.1 to serve .mbtiles created in tilemill (via mbtiles-server.php) on a private host. my knowledge of html and js is very (very) basic, I can't figure out how to use ...
2
votes
0answers
27 views

Unable to get python-qgis-common on Kubuntu 14.04

just upgraded my Kubuntu from 13.10 to 14.04 LTS and lost all plugins. Found out that "python-qgis-common" is not installed. Tried to install it but was told that it depends on "sip-api-10.1" which ...
0
votes
0answers
12 views

Split polygon into four with respect to single point

Some days ago one of my colleague came to ask me a query related to Geometries. The situation is as....There is one Polygon(suppose a city polygon) and there is one point(suppose user's current ...
0
votes
2answers
139 views

How to print legend using GeoServer Print plugin?

I am using Geoserver 2.4.2 on windows. The print plugin works properly without the legend block. However if I include the legend block in my spec file, it throws an error. Following is my spec file: ...
-2
votes
0answers
27 views

brand or model of handheld GPS

What brands or models of handheld GPS are only maximum weight 300g with minimum 10 hrs operational with GNSS?
2
votes
2answers
45 views

How to populate fields for line segment with value from polygon to left and right of it?

I have a countywide roads dataset that is used by an emergency dispatch system. There are two fields, "Comm_RT" and "Comm_LT", that need to be populated by the name of the community polygon they ...
1
vote
2answers
102 views

finding administrative boundaries in Guinea using OSM

I am trying to map the quartiers (neighborhoods) in the city of Conakry, Guinea. As far as I can find, OMS contains information on the location of each quartier, and displays this with a point in ...
0
votes
0answers
12 views

How to generate polygons upto the edge of other polygons?

I am doing some work on a pipe network (blue lines) and I am trying to attribute the information about the street to the pipes. I have 2 polygon layers one of the blocks (green hatch) and one of ...
1
vote
1answer
14 views

Optimize openlayers / Geoserver 2.5 with GeoWebCache - reprojection necessary?

I have an openlayers map setup with several base layer options (some served by my own GeoServer) and many optional layers served by my own GeoServer. I've selected Google's EPSG:900913 as the map's ...
0
votes
3answers
77 views

How to highlight polygons within another polygon?

I want to symbolize public buildings in OSM data. For Example: There is a polygon and in column "amenity" it has the value "school". But i don't want to highlight this polygon, but the buildings ...
0
votes
0answers
24 views

How do I set the xydomain extent and merge point feature classes in a geodatabase

I am trying to select point feature classes in a feature dataset and merge them while setting the XYDomain using Python. If I do the merge manually and change the environment settings to use a ...
0
votes
0answers
16 views

Convert Shp to KML error org2org Error4

I am attempting to convert Shp file to Kml using command line org2org application. I have used this in the past to convert more simple shp files and was sucessful. However I get an error message when ...
0
votes
0answers
9 views

Focal Mean of neighbors using ST_DWithin on points in PostGIS

I'm trying to calculate focal means on a grid of points in PostGIS. I know that a raster calculation would be more efficient, but I only need to run the algorithm once to get the data, so I don't ...
0
votes
1answer
185 views

How to transform/convert Coordinate Reference System with Proj4 and php

Basically my question is: Can I combine the functions of proj4 with php in my server? For example, I would like to know if it is possible get data in WGS84 and transform in ETRS89. I need to get ...
0
votes
0answers
26 views

Euclidean distance tool issue,not obtaining output

I'm trying to perform an exercise but I'm not having the output that I was supposed to have. Which says this Procedure: Open ArcMap and load the Spatial Analyst extension: Customize → Extensions → ...
0
votes
1answer
254 views

Use new OpenLayers.Filter.Logical from OpenLayers into jQuery

I've a small GIS app, displaying stations on a map. Very simple. At start, none of the stations are displayed, even if its layer is enabled. What I want, when I click on a div, is to display one the ...
3
votes
1answer
41 views

Are the functions in OGRPolygon accessible through the python bindings?

I'm currently trying to use the OGR python bindings to process some shapefiles. I want to obtain the number of interior rings in a polygon feature. Unfortunately I'm unable to use the documented ...
2
votes
1answer
253 views

Python Script that calls the Voronoi Polygons Function?

I've been looking to see if there was a way to call Voronoi Polygons function found in Vector/Geometry Tools, directly from the code but I have not found one. Does this currently exist? Is there a way ...

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