1
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0answers
27 views

Merging DEM file generted many negative value in QGIS

With four DEM files downloaded by Python Elevation package, I merged them in QGIS 2.8.3. I use raster-> Miscellanaous -> Input direction, no more attribute was added. The four dem data has ...
1
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0answers
47 views

How to calculate raster area or number of cells for multiple classes in a raster?

I have a raster with many classes and I want to know the area or the number of cells for each class. I found quite a few posts on this topic (see links below). None of the suggestions matched my ...
1
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0answers
38 views

Iterate through multiple polygons to produce a table with elevations using a DEM

My question is similar to this: Iterate through multiple Raster files and compute statistics using Zonal Statistics However, what I want to do is use Model builder to use individual polygons to ...
1
vote
0answers
22 views

Combining line vector shapefiles with different attributes

I'm using ArcGIS 10.3 for desktop. I have two shapefiles, both with polyline vector data for roads in the same area. This area is quite large, approximately 7,500 km², so there are a lot of roads in ...
1
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0answers
35 views

Cutting many lines (as rivers) that are outside of a polygon in QGIS

I would like to extract only the vector lines, that represents rivers in my case, inside a polygon. I tried to use the intersection and clipping from QGIS, but couldn't do it. Any help?
1
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0answers
30 views

How to visualize PostGIS data(geography) in QGIS?

I've created a table that stores spherical circles located all over the globe. But I'm not able to view this data in QGIS. This is my table: CREATE TABLE circles(gid serial PRIMARY KEY, the_geog ...
1
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0answers
50 views

ArcMap & Catalog: DB connection to ACCDB file

I have successfully established a database connection using ArcCatalog to an access database. I am using Access 2013 and ArcMap 10.2.2. I used as a database provider Microsoft Jet Engine version 12.0 ...
1
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0answers
25 views

ArcGIS how to geolocate/georeference raster data arrays?

How does one geolocate (or georeference) a raster of swath grided data with separate lat/lon arrays and multiple data bands using ArcMap 10.3? A sample data file (*.h5) can be downloaded from here ...
1
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0answers
44 views

How can I remove only small inner rings in PostGIS?

I am looking for a way to remove small inner rings in a large polygon. I want to remove only the ones that are below a given surface and keep the bigger ones so that the the look (from a distance) is ...
1
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0answers
19 views

Upload a raster in postgis

I know this might be a similar question to many others. I have been prompting multiple questions here and on google but I cant figure it out. I have a raster and I have uploaded it into postgis with ...
1
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0answers
19 views

Convert a SHP file set to a categorised ASC raster with Qgis?

I have a shapefile with regolith (soil) data that I would like to use as a categorised raster (say 007_1ASC) in Maxent. The regolith data is in the following files: 007_1.cpg 007_1.dbf 007_1.prj ...
1
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0answers
18 views

3D time dimension (x,y,t)

I'm working with data points (x,y) and timestamp t as a separate attribute in my table. (x, y) are in WGS 84 latitude,longitude format while timestamp is in Unix Time. For instance (71.8, -13.5) and ...
1
vote
0answers
26 views

Classification of multiple values at the same point

If I have a point dataset with multiple values for the same geographic location (e.g. residuals from a regression where multiple individuals live at the same location) which I classify using quantile ...
1
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0answers
43 views

OpenLayers 3: Attributions

I have a number of layers which share the same attribution. When more then one of them are visible at the same time I get something like this in my attribution control: Company1 hyperlink1 ...
1
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0answers
9 views

Joined MSSQL Tables are not editable

I want to join two tables(MSSQL tables) in qgis and then match some fields and insert/update them. however when I join two tables from DB Manager and show them as a new layer, I cannot edit any data. ...
1
vote
0answers
34 views

ARCGIS 10, VB.NET, calculate centroids

I have migrated an toolbar initially developed for ArcGIS 9.3. This tool is used by non-programmer or cartographers. One procedure is called to generate centroids of attributes table and after to ...
1
vote
0answers
32 views

Dynamic column header in datatable from json array?

I want to populate datatable with dynamic column header and column data,i can populate dynamic column data successfully,but i cant achieve dynamic column .. I am using json array. My code is <...
1
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0answers
17 views

Geoserver Dynamic Raster Masking Based on Request Parameter

Is it possible for Geoserver to dynamically mask out values above or below a certain threshold in a WMS or WCS Geo-tiff request? For instance I make a request with some threshold parameter like 49 ...
1
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0answers
28 views

How do I use a field attribute in the file name of a PDF export?

I've made a script that iterates through a set of data driven pages. Right now I have it that just the ID number of the data driven page is used in the file name to distinguish between each export. ...
1
vote
0answers
23 views

Can I create a selection on Feature Table by attribute with ArcGIS JS API?

I have a simple app built using the 3.16 API that includes a flat table (so no spatial attributes) using the Feature Table widget. Can I select rows by attribute rather than just by the user clicking ...
1
vote
0answers
18 views

Nightly backup using Import XML Document arcpy ERROR 000791

I'm having some trouble using arcpy.ImportXMLWorkspaceDocument_management to import an XML document into a file geodatabase for a nightly backup routine. The code for the import is as follows: try: ...
1
vote
0answers
10 views

Snap do not perform resample

I try to resample a sentinel 2a image in 10m resolution and I get the following error message java.lang.RuntimeException: Cannot construct DataBuffer. at com.sun.media.jai.util.DataBufferUtils....
1
vote
0answers
48 views

KML with raster in QGIS

I have a kml file which displays correctly in Google Earth but only as a bounding box in QGIS . What can I do to see the associated raster image?
1
vote
0answers
20 views

Setting default value in FileGDB table column during GDAL/ogr2ogr export from PostGIS?

I'm doing an export for one table (table name: 'schaden_polygon') from a PostGIS-database (db-name: 'mydata') to ESRI FileGDB via ogr2ogr commandline-tool. The PostGIS-table contains a column 'm_uuid' ...
1
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0answers
28 views

Problem in layer overlapping (qgis)

I want to plot gps pts on qgis (version 2.14.1). I have added the vector layer of SE Asian countries, and added the delimited text layer of my gps pts which included species name, lat and lon. ...
1
vote
0answers
26 views

Pycharm cannot find reference 'SearchCursor' in 'arcpy.da'

Whenever I try to use a search cursor from arcpy in pycharm, I get this unresolved reference error. I should note that it was working fine earlier in the night, I have no idea what happened. I've ...
1
vote
0answers
22 views

arcRest Token Required

I'm using the arcRest sample copy_item.py file to save an AGOL feature service. The complete script on ESRI's github page is here: https://github.com/Esri/ArcREST/blob/master/samples/copy_item.py I'...
1
vote
0answers
16 views

centos 6.7 ArcGIS for Server 10.3.1: publishingtools will not start?

We're experimenting with ArcGIS for Server (10.3.1) on CentOS (6.7) and I've run into a wall; specifically this: Service failed to start System.PublishingTools.GPServer: LOCALHOST Could ...
1
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0answers
54 views

QGIS Attribute Question

I am trying to create a script that will take selected features from one layer and search for the specified attributes related to a column name. in my case 'id'. What I am having trouble doing right ...
1
vote
0answers
52 views

Cannot run QGIS algorithm with python script without interface

I'm trying to run the QGIS 'intersection' algorithm from a Python script: (Working with Ubuntu) #!/usr/bin/env python # -*- coding: UTF-8 -*- import sys from qgis.core import * from PyQt4.QtGui ...
1
vote
0answers
23 views

Automatic numbering when split the polygon in arcgis

Can anyone help me when I split the polygon the number should be automatically update in the attribute table to the second polygon? Example : I have the polygon name called 5 in attribute table, when ...
1
vote
0answers
27 views

Add qlr file in QGIS- problem

I work with a polyline layer: and the layer located in "G:\desktop\qgis\lyr". After i save the layer in qlr file and saved it in "G:\desktop\qgis\lyr", i try to load the qlr file with "add from ...
1
vote
0answers
48 views

How can I prevent gdal_translate from rounding coordinates when clipping?

I want to clip a raster (a VRT of several Ascii files) to a set of coordinates. Ideally I'd like to use gdal_translate to do this, but I only get an accurate result when using gdalwarp. gdal_translate ...
1
vote
0answers
14 views

Methods on aggregating census tracts for better CV's

I am working on a project that maps out poverty rates (ACS data) by census tract. Many of the tracts have CV's that are just too high for our study and I am hoping for find a sound methodology in ...
1
vote
0answers
35 views

How to smooth “internal” polygon borders

This is my first foray into GIS and GIS software. I am using ArcMap currently. I have a shapefile of the world divided into different ecological regions. I would like to reduce the file size by ...
1
vote
0answers
26 views

How can I style a feature that has multiple values for the same field?

I'm opening a PostgreSQL Table on QGIS which has multiple rows related to the same object (think of how you'd register distinct apartments on the same building). I do get to style it based on any of ...
1
vote
0answers
25 views

Using local kmz files on google maps

I found a google maps api that allows me to overlay my map with a kmz/kml file however it must be hosted remotely. I have my kmz/kml files locally and would like to overlay them on my google maps, how ...
1
vote
0answers
33 views

How to export a training shapefile as an XML spectral signature file via QGIS?

I recently used the answer from Orfeo Toolbox object based classification in QGIS tutorial/workflow to perform an object base segmentation on a spot image i acquired a while ago. I tried both of the ...
1
vote
0answers
9 views

Convert Microstation dgn v8i files to shapefiles in Linux

I am looking for some program which would allow me to convert Microstation .dgn v8i files to OGR supported format (preferably ESRI shapefile) in Linux. I have tried GRASS and QGIS, but both support ...
1
vote
0answers
20 views

What are some intuitive ways to have fuel optimal routes?

Given a road network and two points: start and end, what are some good reliable? ways to estimate the fuel consumption over a road segment (i.e. a network edge). My goal is to output the fuel-optimal ...
1
vote
0answers
25 views

Determine what is activated by QAction.activate(QAction.Trigger)

I'm trying to build a plugin for Qgis where I want to use some functions of a default plugin. I would like to control the options that the user are supose to fill in while using the Interpolation ...
1
vote
0answers
35 views

Going to the zoomed view of a particular 3Dbuilding using an URL in cesium API

I have a cesium application which shows 3d buildings for an area. What I want is if I give some URL it should go to the zoomed view of a particular building. Say for ex: if I give http://localhost:...
1
vote
0answers
41 views

How to convert legend to graphics in QGIS?

I am trying to convert the legend element in the print composer into graphics, like the option in the ArcGIS: Is there some way to do this in QGIS?
1
vote
0answers
17 views

Cropping vector map into tiles with QGIS - how to get around shapefiles which have stray points on boundary of tiles?

I am trying to use QGIS to generate a set of tiles in Shapefile format from a vector coastline map. My script is correctly generating the 5x5 degree tiles I want, however a few tiles clearly have ...
1
vote
0answers
17 views

Graphhopper No-go areas routing

I am creating a simple offline navigation app in android. I have camera information(coordinates and range) and i would like to navigate the routes to avoid being caught on cameras. I have seen great ...
1
vote
0answers
25 views

Extract data in ArcGIS Online from map service hosted by ArcGIS for Server?

I have only found scripting solutions and extensive workarounds. Scenario: map services hosted on ArcServer looking to publish on organizational account on ArcGIS Online via REST The most common ...
1
vote
0answers
8 views

ol.interaction.DragBox - aspect ratio

I want to be able to select a rectangular area of the map, but the selection must have a fixed aspect ratio. Let's assume 2:1 like this: I haven't found any ol.interaction.DragBox option to do this. ...
1
vote
0answers
45 views

False calculated slope?

After the DEM creation, I wanted to create slope layer. However the result has not satisfied me. I don't think the slope map is correct. Have you ever encountered false calculated terrain map?
1
vote
0answers
15 views

Surface attribute only calculated for actual points and not interpolated

When I run the surface hillshade, slope and aspect in the Arc Toolbox using my raster surface it appears to be calculating the attribute only for the data points and not for the interpolated areas ...

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