0
votes
0answers
4 views

How to create lines to visualize differences between polygon features in PostGIS?

I've a PostGIS table 'polygon_b' with some polygon features. There is also a table 'polygon_a' which contains the same polygons as 'polygon_b' but with minor changes. Now I want to create lines to ...
0
votes
0answers
5 views

Administrative Regions? [on hold]

Is there a way to "smart" design administrative regions within countries or i just have to design them through the polygon tool? Sorry for the question if it is obvious or too simple, but I'm new to ...
0
votes
0answers
5 views

Using findAndReplaceWorkspacePaths to change picture path element- ArcPy

I changed my hard disk name. As a result, the picture element, in 60 MXD files, disappear and there only blanked rectangle instead. I know one way to solved it, by go to the picture element. But i try ...
0
votes
0answers
5 views

What is the correct format for APA referencing maps produced in QGIS, including data layers?

I need to cite maps produced in QGIS. In addition to my own data, I have used the opensource MapQuest OSM basemap, and a 25m land type data layer obtained from Digimap. I would also like to include ...
1
vote
0answers
7 views

Using findAndReplaceWorkspacePaths to change datasource for CAD files- ArcPy

I try to use "findAndReplaceWorkspacePaths" in order to change datasource for CAD files. This code works fine but when there no cad layers to work with, despite this the code will print ...
2
votes
0answers
9 views

Can't Find the Split selected features with selected line from another layer tool

I'm trying to split a selected polygon features with a selected line from another feature layer. I, however, can't seem to get the tool for this to show up in my advanced digitize toolbar. In ...
1
vote
1answer
9 views

Which tool for custom queries? [on hold]

I'm new to the GIS world, and I'm trying to work out what tool I should start with in order to analyse some data and run custom spatial queries on it. I have a data set representing the recording of a ...
0
votes
1answer
9 views

Ora: 01036 illegal variable name/number in ArcObjects

I want to write a feature to a featureclass and use bellow code.On StopingEditing() return error "Ora: 01036 illegal variable name/number ". What am i missing? IWorkspace ws = ...
1
vote
0answers
9 views

R gdalUtils::ogrinfo error or very slow

I am pulling WFS data into R and using gdalUtils::ogrinfo to look at the available layer names on a WFS server. Using the same url in QGIS, this is very fast and gives complete information. With ...
2
votes
0answers
13 views

Insert sequential row and column values automatically into a fishnet dataset

I have a grid that has about 30 rows with approx 15 columns each. I want to label them as A1,A2,B1,B2 etc (Alphabet row, integer is column). Is there any way to do this programatically? There is no ...
0
votes
1answer
19 views

Which nodejs-postgis package do you recommend? [on hold]

I need your recommendations. I want to use nodejs with postgis? which nodejs-postgis package do you recommend? regards
1
vote
1answer
19 views

QGIS Pre-set CRS/projections missing/unavailable

I am using QGIS 2.0.1 running off of a Ubuntu computer. I have been going through some basic tutorials (http://fossgeo.org/free-qgis-courses/) and have come up against a small and silly little ...
0
votes
0answers
5 views

adding points of interest

I wanted to know if anyone could please help me in adding point to my map. every time I add a point the map disappears. And how to rename the untitled as point of interest. Thank You
3
votes
1answer
17 views

Merge a list of spatial polygon objects in R

I have a list of spatial buffers (30000 buffers) that I built with the function lapply: buff.pts <- lapply(1:nrow(pts.prj), FUN=function(l){ buff <- gBuffer(pts.prj[l,], width=1000) ## 1km ...
0
votes
0answers
6 views

OL3 client zoom functionality?

OpenLayers 2 offered a "client zoom" functionality by which a tiled source could be zoomed in client-side beyond the tile server supported resolutions: ...
3
votes
1answer
6 views

How do I get the bounds of a layerGroup in Leaflet?

I have added multiple geoJSON layers to my map by first adding them to a LayerGroup and then adding the layerGroup to the map. Now I want to call fitBounds on the map with the combined bounds of all ...
2
votes
1answer
11 views

Problem in ubuntu loading geoserver wms layer in local server with leaflet

I am just starting to work with geoserver. I am trying to do the same openlayers-geoserver example but using leaflet to view the map instead of openlayers: Publishing a shapefile This code is not ...
1
vote
0answers
8 views

D3: center a map feature using correct latitude and longitude, without rotation?

The following is a map of Chicago which I've created in D3.js, and the JS code to render it. I had a very hard time centering Chicago within my viewfinder (the white box). After much trial and ...
2
votes
0answers
23 views

Retrieve Google Maps API friendly latitudes and longitudes from shape file polygon

I have a shape file with a polygon in it, and I am trying to the latitudes and longitudes associated with it so I can use them with the Google Maps API. So far I have been working with QGIS Lyon and ...
3
votes
1answer
19 views

QGIS convert long integers stored as string to integer

I have long integers (11 characters) stored as text in a shapefile that I need to convert to integers, but when I attempt to convert them in the QGIS field calculator, I get the following error: Eval ...
2
votes
1answer
11 views

Using Midvatten plugin in QGIS?

After installation of the Midvatten plug in (QGIS 2.12 Lyon), i tried to get confidence with the plugin following the tutorial. When trying to plot stratygraphy data, a QGIS error shows up: "the ...
1
vote
0answers
7 views

How to update ArcGIS online metadata using the API?

I am trying to update metadata (XML file) for ArcGIS online items using the REST API but I am not quite sure how to do that. It says in the documentation that I should be able to change the metadata ...
3
votes
1answer
33 views

Creating a new Normal template in ArcCatalog?

I need to restore my ArcCatalog template to its original default. I am missing the main tab above the toolbar i.e. edit/file/customize etc...I am running ArcCatalog 10.3 on a Windows 10 operating ...
2
votes
1answer
18 views

Displaying Raster Source Information

I have a large number of raster files I'm working on. I need to figure out how each of the files was processed from. I have a composite land cover map and would like to view the file names and ...
2
votes
1answer
14 views

org2ogr PostgreSQL to GPX

I already have found how to import GPX files into PostgreSQL using gdal/org2org. Now I am wondering of dumping into GPX files the results of my modification on dataset stored into PostgreSQL. But I ...
0
votes
0answers
17 views

What is causing a “Failed to edit the selected object(s)” error?

I have a file named 'water use.lyr' which is a practical file accompanying by 'Getting started to ArcGIS' book (ESRI). When I want to open this file, I get 'Failed to edit the selected object(s)' ...
2
votes
1answer
19 views

Wrong shape display with North_Pole_Azimuthal_Equidistant projection

I need to create a map that displays the breeding and wintering ground of a bird species that has a circular arctic breeding distribution and winters in Africa. The map should lool pretty much like ...
1
vote
1answer
9 views

Calculate field based on user defined parameters in ModelBuilder?

I want to use ModelBuilder to dissolve polygons by a field whose values are concatenated strings based on 3 other fields. The general process is this: Add field, type string, called "concat". Field ...
1
vote
0answers
10 views

How to Avoid that Label Covers Icon?

I'm trying to render both house numbers and icons for sirens on a map in QGIS. Now I have added two layers with siren nodes and building outlines, the siren layer being above the buildings. In the ...
-1
votes
0answers
21 views

Learning GIS basics? [on hold]

I recently got to know about GIS. Can you tell me please what do I need to start learning GIS book references or any other reference. Also what do I need to have on my laptop for GIS (application or ...
-1
votes
0answers
28 views

Can QGIS 2.8 (Wien) export to Mapserver?

I've tried to export with RT Mapserver Export but it hasn't worked. I'm running >QGIS 2.8.6 on W7 x64. Sorry for my undocumented answer. So, first I install RT Mapserver Export plugin without ...
1
vote
0answers
11 views

How to use Leaflet's overlayadd event

In the example at http://jsfiddle.net/gwulo/w6cvagoL/4/ I'd like to force only one overlay to be visible. So if you select Cities2 in the layer switcher, the Cities1 overlay should be de-selected. ...
3
votes
1answer
24 views

Why this query on Oracle Spatial returns null? (Or how to retrieve WKB)

I am begginer on GIS, and I have loaded a shapefile to MSSQL, PostGIS and Oracle Spatial (11g) On both MSSQL and PostGIS I could create a query to return me the WKB from the table (geometry field) ...
6
votes
2answers
59 views

How to automatically sum up values within buffers?

I want to establish the population figures within multi-ring buffers around certain site. I have set up the buffers and am running a select by location query on each concentric ring. Once the ...
4
votes
0answers
22 views

Create polygon symbology from attribute?

I have shape file with polygons and lines. There are attributes for: layer, lineweight, colour: Red, colour: Green, colour: Blue. (colour values are from 0-255) Is there a way to read values from ...
1
vote
1answer
5 views

Set view doesnot work after Fitbounds

I have a map and a layergroup. var map = L.map('map').setView([27.6758,85.3313], 12); L.tileLayer('http://{s}.tile.cloudmade.com/8ae544230be74379927e6dee5d416398/997/256/{z}/{x}/{y}.png', ...
1
vote
1answer
12 views

Get the coordinates of the snapped and clicked point in ArcGIS Engine

I am developing an ArcGIS Engine program. I am using the code below to activate snapping to a layer programmatically. I want to get the coordinates of the snapped point (clicked point). I know I must ...
1
vote
0answers
14 views

How to point out a place in iframe using latitude and longitude

I want point out a place using latitude and longitude in following frame, <iframe width="75%" height="550" frameborder="0" scrolling="no" marginheight="0" ...
3
votes
0answers
17 views

Can I read ephemeris data from GPS receiver?

I want to filter the GPS data. when I use the low cost GPS receiver, it gives erroneous data. therefore I want to apply some filtering technique. How can I read ephemeris data from GPS receiver? I ...
4
votes
0answers
37 views

QGIS/OGR shp to tab export - crashing Mapinfo due to number format issues

I created a vector grid in QGIS and it exports as SHP -no issues. When I save as tab and try to open the file in MapInfo it crashes. According to ...
1
vote
0answers
12 views

ArcGIS - CTF and DAT files

How does one open CTF and DAT files as listed here using ArcGIS 10.3? I looked for instructions on their website but there isn't much guidance.
2
votes
1answer
22 views

Paste a feature from an existing shapefile into a row with null geometry in QGIS

If I have an existing row in my PostGIS database with NULL geometry, is it possible to select a feature from another layer in QGIS, and paste that into the empty geometry column for the PostGIS row?
1
vote
0answers
13 views

Can't display raster in mxd as RGB

I have a script that iterates through a folder of jpgs, clips them to a grid, inserts them to an mxd, and exports them. My original problem was when I added the clipped raster from a standalone script ...
2
votes
0answers
31 views

Is there something like postgis for mariaDB? [on hold]

Someone told me that PostGIS exists. Currently I'm storing latitude and longitude information un a MariaDB, but I want to know if there is something similar for MariaDB. Unfortunately, migrating to ...
2
votes
1answer
33 views

How to iterate through layers of an MXD?

I know model builder will not iterate through the layers in an MXD, which is kind of fundamentally stupid if you ask me, but I still need to do exactly that. I am not a strong coder but i understand ...
2
votes
0answers
9 views

Looking for a raster calculator C# class

I am developing an application using C# and dotspatial. I need to performs raster calculation a lot..I need a library which helps me to do it..Do you know any library for this purpose? The library ...
1
vote
0answers
11 views

Get dynamic params created from new ol.source.ImageWMS

According to this documentation of ol3 the params option of WIDTH, HEIGHT, BBOX and CRS (SRS for WMS version < 1.3.0) will be set dynamically. How can someone retrieve this information? Get for ...
2
votes
1answer
9 views

How to Sync an existing table in CartoDB

Two questions regarding synced tables. 1) What is the best way of Syncing an existing table? I have a data set (let's call this table web_survey_results) that is driving an external map ...
2
votes
1answer
34 views

Extract the edge between two raster cells with different values

Is there a way in R to create lines (black lines in the figure below) along the edge between two raster cells that have different values ? Update I'm trying the functions clump() and ...
1
vote
0answers
19 views

How to open a shapefile using ArgParse in Python? [duplicate]

I am trying to open a folder of shapefiles along with their associated files (i.e. '.prj, .cpg' etc) using Argparse in Python. I'm not sure if the code below is a good place to start: parser = ...

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