3
votes
0answers
39 views

arcpy, ExportToSVG using paths

I want to export part of the map into (very big) SVG file. First I tried to do this using REST API: https://*server*/ArcGIS/rest/services/General/Etages/MapServer/export. This worked, the SVG file ...
3
votes
0answers
33 views

Search Table of Contents in MXD

This is probably a very straightforward question, but I can't see if this is at all possible. I often work with MXDs that have a large number of group layers, and would like to find a specific layer ...
3
votes
0answers
25 views

gdal java API returning different WKT from gdalinfo

I am running into an interesting bug where the wkt returned from dataset.getProjection() does not match the wkt returned from gdalinfo. (simplified) code: final Dataset dataset = ...
3
votes
0answers
35 views

Printing a 1" scale from 2.8.2 Print Composer

I'm working on a small-scale site survey in qGIS, and for engineering purposes I need to print physical copies of the map that can be used with an engineering ruler. Basically, I need a way to print ...
3
votes
0answers
33 views

MMQGis plugin error

I am using QGIS 2.8.2 and I'm trying to geocode some addresses, but when I run it, I get this error: An error has occured while executing Python code: Traceback (most recent call last): File ...
3
votes
0answers
37 views

How can I show timezone in TileMill?

I downloaded data from Natural Earth Data and added it to TileMill (git revision 8044976 on Mac) I downloaded raster data, borders, cities, airports and timezones. However, the timezones show only a ...
3
votes
0answers
50 views

How to develop QGIS Plugin to fully run Spatial Queries With PostGIS?

I'm developing a QGIS plugin that fully run spatial queries with PostGIS. Actually I developed all spatial queries wish need some adjustment. I'm looking for some ressources or documents to know how ...
3
votes
0answers
61 views

C# implementation of concave hull / alpha shapes

I'm looking for a C# implementation of the Concave hull (alpha shapes) algorithm. I already found several Java, Python and C++ implementation but no C# version. The other implementation are quite ...
3
votes
0answers
75 views

Which projection can I use to see alignments on great circles?

I want to put on a QGIS map some historical sites to check if they are aligned. If an alignement exists, the points should stay on a great circle (is this correct?). I want to visually verify this ...
3
votes
0answers
18 views

Should Endmembers be Normalized for Linear Unmixing?

In biological spectral microscopy, the standard in the field is to use normalized endmembers in linear unmixing algorithms. In most cases, the endmembers are normalized to the maximum value. I have ...
3
votes
0answers
56 views

How to compute NDSI in ArcGIS for Desktop?

How do I compute a Normalized Difference Snow Index (NDSI) in ArcGIS's Raster Calculator? I have a Landsat 8 scene (hdf4 format) that contains derived surface reflectance band-by-band. Each band is a ...
3
votes
0answers
46 views

From Landsat spectral radiance (W/m2*sr*µm) to Global horizontal irradiance (W/m2) for mere mortals

We are working in a solar energy project to locate potential sites for solar panel farms. We are using the Landsat 7 panchromatic band to derive radiance with GRASS using i.landsat.toar (W/m2*sr*µm ...
3
votes
0answers
44 views

can I preserve a fading alpha layer when mosaicing images with gdal?

I am mosaicing some images with gdal and would like to improve the final result by using a fading / gradual alpha layer towards the edge of each image to remove the sharp edges in the middle of the ...
3
votes
0answers
35 views

Why does @data@values slot for RasterLayer only contain logical(0) and not the actual values?

Trying to get to the bottom of why, when I read in a raster of NDVI, the @data@values slot does not contain the actual values until I set them manually. For example: NDVI <- ...
3
votes
0answers
71 views

Solution for Test Automation for web gis/mapping application?

I've to find a solution for test automation for web gis/mapping application that using OpenLayers 2.x or Leaflet as javascript libraries. I'm oriented on evaluate Selenium WebDriver (or other similar ...
3
votes
0answers
59 views

Make XY Event Layer in ArcGIS Pro

I am using ArcGIS pro for the first time. I have a csv excel sheet with X, Y and ID. I have tried to make an XY event layer but I get the 000055 error How do I add xy data in this system?
3
votes
0answers
42 views

Steiner tree problem: Optimal routes for Fibre planning on road network

I am trying to solve a large optimization problem where I have a set of nodes on a road network that need to be connected using fibre using the shortest possible amount of fibre. The problem is a ...
3
votes
0answers
56 views

Publishing a geoprocessing service that imports modules besides arcpy?

I'm trying to publish a geoprocessing service (10.2.1) that will be used to generate a PDF from a webmap using an MXD layout as a template. The problem is that if I try to import any module besides ...
3
votes
0answers
27 views

Review Edited Layers Before Saving

In Arcmap, there a plugin/addon available that will list the layers that have been edited when the "Save Edits" dialog pops up? Sometimes I get nervous that I might have deleted from a layer that I ...
3
votes
0answers
38 views

Cokriging using categorical covariables in ArcMap?

I am using cokriging to model a continuous variable across my study unit (soil carbon). I have one continuous covariable (soil moisture) but also a categorical covariable (vegetation community). I am ...
3
votes
0answers
34 views

Output formats for QGIS Heatmap plugin not appearing in drop-drown in Ubuntu

I've been trying to use the heatmap plugin on QGIS (2.8.2) on Ubuntu(14.04) but the drop down for the output formats doesn't get populated. Selecting the drop-down allows me to press OK on the plugin ...
3
votes
0answers
26 views

Programatically export map clusters in QGIS

I'm trying to export each microcluster of a large map into a composed map that shows the ff on an A4 sheet: 1) Cluster/grid box of the map 2) Larger index map with the pertinent region highlighted ...
3
votes
0answers
106 views

Is it possible to create Isochrones in QGIS GUI?

I'm new to QGIS and have tried to create isochrones around points for quite some time. Is there any option to create isochrones on the GUI in QGIS? I know how to create them using pgAdmin (using eg ...
3
votes
0answers
124 views

How does gdal_calc numpy operators work?

Gdal_calc manual Gdal_calc is introduced as : gdal_calc.py - Command line raster calculator with numpy syntax gdal_calc.py [-A <filename>] [--A_band] [-B...-Z filename] [other_options] ...
3
votes
0answers
100 views

Update ArcGIS Online with FME

I am having problems trying to write ArcGIS Online Feature Service in update mode. Our process is very simple. We published data from Oracle SDE to ArcGIS Online Feature Service with ArcMap. The ...
3
votes
0answers
62 views

Set picture marker symbol for a layer with arcpy (ArcGIS)

I have an ArcGIS map document with one layer symbolized with Categories > Unique values. I want to update symbology for this layer by specifying a path to a picture marker symbol for every unique ...
3
votes
0answers
112 views

Items (scripts) in custom toolbar are not working

I created custom toolbar in my working mxd and added few menus to it: Using customize dialog I added some system and my own tools (scripts) to it: It worked great for last two months or so, ...
3
votes
0answers
50 views

Using Boolean like Domains?

When needing to represent True / False or Yes / No which of the following examples is better from a geodatabase design point of view? Our database architect hates the option on the right but when ...
3
votes
0answers
53 views

How to offset polyline geometries (not symbology) using QGIS?

I have a polyline layer which has a road network digitized, up the center, in both directions however the polyline are sat "one on top of the other". I can display the lines separately by ...
3
votes
0answers
58 views

How to make a virtual field function use the same Ellipsoid settings as the normal field calculator?

I have a new shapefile layer in CRS 3857, in a project that has the same CRS. Under project properties, the measure tool is on ellipsoid WGS 84. When i use the field calculator to create a new field ...
3
votes
0answers
65 views

Segmentation fault in SAGA GIS

When I try to launch SAGA GIS I get this error: "segmentation fault (core dumped)" How can I solve this problem? I am using Lubuntu 14.04 64-bit.
3
votes
0answers
58 views

Data format for offline apps on iPad?

For an iPAD application (based on WhirlyGlobe) we've two modes: offline and online. It's a meteorological application so each day around 1600 layers (worldwide) per day are created on the servers. ...
3
votes
0answers
101 views

Memory issue inserting a large dataset in GDB with ArcObjects

I am using the ArcObjects API for Java to load a very large dataset in a File Geodatabase in one feature class. The whole dataset I have to load is composed of 200 datasets of 30k polygons, and I ...
3
votes
0answers
100 views

Performance difference between focal statistics (ArcGIS) and neighbor (GRAS or QGIS)

I tested minimum, maximum, and average neighbor (circle radius = 161 pixel) using ArcGIS, GRASS and QGIS: ArcGIS (10.1): it takes only one minute GRASS (6.4.3): it takes 123 minutes for every output ...
3
votes
0answers
55 views

QGIS atlas generation - batch process for many atlases

I have many different QGIS projects, each one is designed to create one particular atlas or map book in pdf format (one different book per every QGIS project). Month by month I must actualize each ...
3
votes
0answers
59 views

Is it possible to replicate an SDE geodatabase including the archive tables?

I have a database in one location which I would like to replicate to another using one-way replication. In testing we haven't been able to replicate the archive tables, which is unfortunate because we ...
3
votes
0answers
21 views

Cropping eudem with GDAL creates zig-zag terain

I have downloaded EUDEM (20Gb) from http://www.eea.europa.eu/data-and-maps/data/eu-dem#tab-original-data When I try to crop it by GDAL using: gdalwarp -dstalpha -of EHdr -crop_to_cutline -cutline ...
3
votes
0answers
83 views

Problem with Flow Direction in DEM

I have the following problem with Flow Direction Tool in my DEM and with such wrong calculated flow direction in the centre of DEM I am unable to delineate any watershed. What can I do?
3
votes
0answers
93 views

QGIS 2.8 PrintComposer, no coordinates shown

I tested under MacOS 10.10.3 and 10.9.5 now: In the QGIS v2.8 Print Composer I don´t get coordinates shown when I want to create a map sheet and activate "Draw coordinates". I can do all settings ...
3
votes
0answers
53 views

Adjacency matrix for polygons using Java

I am trying to create an adjacency matrix from a set of polygons. That is, I have a bunch of polygons and I want to identify which polygons have a common edge or "touch" each other. Once I find this ...
3
votes
0answers
32 views

Saving a calibrated route in QGIS for “future” use

Can a Calibrated Vector (after using LRS) be saved with M values, so that the file does not have to be calibrated every time is used? We're currently working on State road data, and it has many ...
3
votes
0answers
57 views

Is there any way to aggregate points within a certain distance of eachother into groups of X?

I know it's possible to aggregate points within a certain distance of eachother, but is it also possible to aggregate them into groups of e.g. 20? I'm fine with using most open source GIS software or ...
3
votes
0answers
196 views

Arcgis arcpy toolbox multiply files: error - module object has no attribute

I have a big .pyt script (python toolbox) and now i trying split it to many files (1 file - 1 tool). In single .pyt file everything works perfectly, but when file is splited i get this message: ...
3
votes
0answers
92 views

What is the best way to overhaul metadata to bring it up to ISO standards?

My company would like to perform a complete overhaul of their metadata. They would like to use the ISO standard. What is the best way to go about this? I have been researching and have done a lot of ...
3
votes
0answers
139 views

How to stop a PyQGIS script that has an infinite loop, using the keyboard?

So i wrote a script that does what i want over and over again using a "while True:" in a certain time interval (every 5 seconds using time.sleep(5)). So far so good BUT when i want to stop it i just ...
3
votes
0answers
43 views

Save edits before disconnecting users from enterprise geodatabase?

Is there any method that enables the Administrator to save the users edits before disconnecting them for an enterprise geodatabase. Because I am disconnecting users as shown in the screenshot, but ...
3
votes
0answers
239 views

ScriptError ArcToolbox, unable to work

This problem keeps occuring. Any function within the ArcToolbox gives this error message with different code. The message below comes from using the 'Hillshade' tool. I've updated my ArcGIS for ...
3
votes
0answers
53 views

Why different transformation behaviour ArcGIS Pro 2D/3D layers?

I am working with ArcGIS Pro and have noticed a strange difference between the co-ordinate transformation of 2D and 3D layers. Here are my transformation settings: I have the same layer ...
3
votes
0answers
85 views

PostGIS Recursive Query Based on Line Connectivity

I'm having difficulty with a query. I have a network of linestrings, each with a value in the n_type column. This can be one of a handful of options. I'd like to generate a new table that groups any ...
3
votes
0answers
116 views

Why does field calculator compute area in square meters?

I am using EPSG:102748, and have set my Settings/Option preferred measurement units to ft. My CRS is NAD_1983_StatePlane_Washington_North_FIPS_4601_Feet, and when I use the measure tool, it returns ...

15 30 50 per page