0
votes
1answer
30 views

How to eliminate polygon overlap areas in QGIS?

Is there a way to remove polygon overlaps within the same layer using QGIS, preferably removing the overlap area of the biggest polygon (having the greatest surface)? All of my polygons are in the ...
-1
votes
0answers
11 views

SetTimeout on gmap3

I have a small problem, I want to setTimeout on the geocode as the limit is 11 markers and I have 13 to display, I have tried wrapping different parts of the geocode in a setTimeout but cannot get it ...
0
votes
0answers
25 views

QGIS Raster Calculator giving a NaN output

This is my first time using QGIS and I am trying to use it to generate NDVI maps from data captured by my UAV. However when I apply the NDVI formula in the raster calculator using my NIRGB image the ...
0
votes
0answers
14 views

EpaNet2.dll gives 305 error code from arcmap addin application

I have an input file(.inp) of EpaNet project. I want to use this .inp file to run the project with the help of epanet2.dll from my arcmap addin button. In EPANET project , there is a portion that is ...
0
votes
0answers
32 views

Arcmap export select By Graphics with query

I use select By Graphics then I use this code to see what I can export but it don't work 100% it export Sample Line-40 and Line-40 is not in the area I select By Graphics can anyone help me with this ...
0
votes
1answer
35 views

Failed to execute (RastertoPolygon) Syntax error at or near symbol SPACE

I'm converting series of raster to polygon using RastertoPolygon in arcpy. #import the module import arcpy from arcpy.sa import * from arcpy import env arcpy.CheckOutExtension("Spatial") ...
0
votes
1answer
26 views

QGIS Python Scripting permission denied

I've just started a Python Scripting tutorial on QGIS. The problem arrives right at the end, when I have to use this script: output_file = open('c:/Users/Ujaval/Desktop/airports.txt', 'w') for f in ...
0
votes
1answer
32 views

How to add arcgis templates to .NET

How can I add ArcGIS 10 templates to my .NET 2013. and is it for free?
0
votes
0answers
16 views

Why does WPS on Geoserver return unknown objects?

I am a beginner in GIS, more specifically Geoserver used with ESRI ArcGis, and here is my problem: When I run a gs:Clip WPS on a layer with points, some of the objects it gets from the oracle ...
1
vote
2answers
43 views

How to generate random points from FIDs using ArcPy or ArcGIS Field Calculator?

I'm trying to generate a shapefile of random points using FID from the attribute table. My attribute table has 800,000 features and I only need a sample of 240. Is there a way to do it in arcpy or in ...
0
votes
0answers
25 views

Masking Labeles in the Compositor in QGIS 2.8.1

I am looking for a way to remove/mask out Labels that are under a composer Element (Overview Map), which I moved in front of my main map (to have more Space). Is there a way to do this? I tried the ...
1
vote
0answers
32 views

Align vector and raster layers with D3

I have a geocoded raster image that I want to use as the background to a vector map with D3.js. The screenshot shows the layers in QGIS (grey is raster). Here's the markup for the map: <div ...
0
votes
1answer
23 views

how to insert area of polygon into a column named area in a polygon map in cartodb?

SELECT ST_Area(the_geom) FROM cartodb_query gives the area but trying to insert it into an area column using: UPDATE cartodb_query SET area = ST_Area(the_geom) doesn't work.
0
votes
1answer
8 views

Navigate in layer parameters

I've a layer who contain many parameters like number. I try to "navigate" in this layer for make a specific action. The schematic structure of my layer look like : object : [a] - item (1) - [o] - ...
0
votes
1answer
13 views

assign sld to Openlayers 3 TileWMS

Based on this: Apply an SLD saved on Geoserver to OpenLayers 3 I try to set a SLD in the params of a TileWMS. The SLD is saved on Geoserver, but everything i tried failed. The strange thing about it ...
0
votes
0answers
11 views

EPANet dll integration in ArcMap Addin not working?

I am unable to get EPANet dll function running from my ArcMap Addin (C#.NetAPI). The same source for dll's function calling is working in an independent console application but when I do the same ...
0
votes
1answer
14 views

Creating network in ArcMap from an RGB image to find optimal path between locations?

I am hoping to find optimal routes from an Origin (car park) to destinations (Library, Blocks, Rec Center). I have an RGB ortho-mosiac image taken from an UAV that I want to digitize paths, car ...
0
votes
0answers
21 views

Remove no-data values from a raster using raster calculator

Can someone please tell me what the formula is to remove no data values from a raster in QGIS? I have a large DEM .tif file and need to remove the no data values. Is it better to use SAGA to perform ...
0
votes
1answer
17 views

Integrating ArcGIS Desktop and web map? [duplicate]

I have some data that has been mapped in ArcGIS Desktop. I would like to develop something like if I add/change some parameters a new map can be derived so that it can be used for predicting as well. ...
1
vote
1answer
39 views

Projection of Boston housing data

Boston housing data provided by GeoDa center is a well-known dataset. GeoDa Center provides this data in shapefile format. A metadata file included in the download indicates that the data use ...
-1
votes
1answer
23 views

How can I convert a geojson file to topojson in R?

I have tried the geojsonio package but it does not allow me to convert my geojson to topojson format. I know there are web applications available online to convert from geojson to topojson, but my ...
0
votes
1answer
33 views

Function to merge geojson and csv data in R

I have been using merge() to merge my geojson file with csv data in R. My codes are as follows: map@data <- merge(map@data, csvdata, by.x="ID", by.y="ID") However, after exporting the geojson ...
0
votes
1answer
29 views

Weighted Overlay final raster to indicate inputs

I have a weighted overlay that identifies the most important areas in a corridor scaled from 0 - 100. I would like to be able to click on a cell and be able to identify which input rasters contributed ...
0
votes
1answer
11 views

How do you set the extent of a CartoDB 'embed' map?

Using the basic CartoDB 'embed' option, how is the extent stored / saved / set for a map? For example: 1 CartoDB map (formerly 'visualization') has three potential pages on my blog / website ...
0
votes
1answer
22 views

Mosaic to raster 16BIT Error 999999

I am using ArcGIS for Desktop 10.1. I am trying to merge a few 16bit rasters by Mosaic to New Raster. The problem is it makes me do only a 8bit output making me lose pixel data bigger than 255 and ...
-1
votes
0answers
26 views

QGIS web mapping using WMS server? [on hold]

I want to publish my QGIS map. How to make it using WMS as server and PostgreSQL as my database?
0
votes
0answers
46 views

Leaflet custom div & click propagation on other elements

I've gotten custom HTML applied successfully within my #map element (where Leaflet is appended) but I'm having unusual behavior with other Leaflet objects that find themselves within the transparent ...
1
vote
0answers
23 views

An algorithm that could find a random cycle in a graph

I am looking for an algorithm that could find a random cycle in a graph from a node while that cycle is traversing around another nodes (area). For example, from the green star on the left of the ...
-2
votes
0answers
46 views

Installing ArcPy on Mac?

I want to use an answer from Batch shapefile merge, with adding and calculating field to create a merge of 50 shapefiles but I only have a Mac. Is there a way to install ArcPy on my Mac so I can ...
0
votes
0answers
30 views

How would I use field calculator to mark min & max values associated with a case field? [on hold]

I have a point shapefile for which I need to mark the minimum and maximum point value that is tied to a case field. Once marked I would use the marked values to symbolize categories 100th, 1000th and ...
1
vote
1answer
26 views

Number of lines within specified distance of thousands of polygons

I have ~5000 polygons in green (districts). I have storms that I am interested in as red lines. Each storm has a unique ID. Looking to add fields to the districts. The fields are 25km, 50km, 100km, ...
2
votes
0answers
34 views

Finding number of left and right turns for each shortest route

I have a network dataset for a city. I have, lets say, 200 trips that are made in that city. I constructed the shortest route for the every pair of the trips, and also the actual route travelled by ...
2
votes
0answers
28 views

Scripting Address Coder actions in ArcPy?

I am currently using ArcGIS 10.3 for Desktop that comes with the "Address Coder" tool. This tool has some features that I need as part of my geocoding requirements: in specific, the option to append ...
1
vote
1answer
41 views

Directly querying a raster

I've done tons of work within ArcGIS to analyze and process rasters. I'm pretty well knowledgeable on that subject. A question has come in from my coworker who is attempting to populate elevation data ...
0
votes
0answers
23 views

Is it possible to use GPS navigation with track up in QGIS 2.8

Can we have a rotating map while navigating with a GPS so our track is always pointing up? Just like a car GPS
0
votes
0answers
21 views

SAGA algorithms don't work in QGIS 2.8

when I have installed recently QGIS 2.8 and, since then, SAGA algorithms don't work. Apparently, the algorithm runs well (any error is showed while it is executing the algorithm), however, there is ...
0
votes
2answers
43 views

get center coordinates of a buiding(way)

Using overpass-turbo I got data like this: { "type": "way", "id": 292833530, "nodes": [ 2963934681, 924717449, 2963934682, 2963934683, 2963934684, 2963934685, ...
1
vote
1answer
45 views

Add and Calculate Field in Table with ArcPy?

I have written the following script to iterate it as a tool for all my tables with ModelBuilder, but i have a problem wth my codeblock. I want to add a field FID to all my tables and to add the values ...
1
vote
3answers
39 views

Create a reference number (id) based on x coordinate in QGIS

I would like to add a reference number to a point table. I would like this value to increase as I move from west to east across my data. So the values read 1 to n from west to east. I have an ...
1
vote
1answer
35 views

How to change sign of z value in a large dataset?

I have data in an XYZ format (saved as a .txt file) that I am importing into ArcGIS and then converting to a raster using the point to raster conversion. However the Z field in the data represents a ...
1
vote
2answers
40 views

Is it possible to withhold attribute data from a shapefile?

Basically, what I'm trying to figure out is if its possible to withhold or lock attribute data from a shapefile if you are sending the shapefile to someone?
0
votes
0answers
23 views

Torque heatmap on CartoDB with time control

I am interested in create a Torque Heatmap in which you can see the events occured every year in one step, for twelve years in total. Every event has a aggregation or ponderation value (they are the ...
1
vote
1answer
21 views

Receiving NULL values from Point Sampling Tool in QGIS

I am using QGIS 2.8.2. My project includes a raster layer of flow depth representing the output from a flood simulation (.DAT file). It also includes a vector layer of points representing the ...
3
votes
4answers
171 views

Removing first and third zeros of a fieldname in label expression

The fieldname only has three characters. I dont want to display zeros in the first and third values. example below. 010 = 1 100 = 10 01Y = 1Y 10Y = 10Y I have figured out how to strip out zeros ...
1
vote
2answers
25 views

How to use STUnion with GroupBy

I'm using SQL Server 2008 R2 to store Geometry data types. I have a bunch of lines as individual features, that share common names ('NAME' field). I would like to create a view that Groups By 'NAME' ...
1
vote
0answers
25 views

GDAL equivalent to ArcGIS Union?

I have a single shapefile full of overlapping polygons. The ArcGIS Union tool will generate individual, non-overlapping polygons with that geometry. Is there a way to do this with GDAL/OGR or another ...
2
votes
1answer
44 views

LiDAR data download, merge and mosaic (Minnesota state)

I have been using the toolbox found here to download LiDAR data for MN (Minnesota-US). The tool is very convenient for downloading multiple tiles but the merge/mosaic function of the tool is ...
0
votes
1answer
22 views

Finding British Columbia township grid?

I'm looking for a shapefile of the Dominion Land Survey township grid for British Columbia. Where might I find this data?
2
votes
2answers
65 views

Cutting a polygon out of another polygon with python [duplicate]

Licence: ArcEditor Version: ArcMap 10.0 i have some issues to separat my data with python. To illustrate the problem, i have simplifyed the data with figures. I want to cut the blue polygon ...
0
votes
1answer
25 views

where to download gdal_polygonize.py?

I am trying to help out a friend of mine. She learnt GIS in school in the past using ArcGIS but has recently installed QGIS package on her Mac OSX. When she tries to render raster into shape file, ...

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