All Questions

2
votes
0answers
25 views

Do I need the standalone GRASS app if I have the GRASS Plugin and Processing toolbox enabled in QGIS? [on hold]

What processing abilities does the standalone GRASS GIS application have that aren't available in the QGIS GRASS plugin/toolbox? I'm trying to understand whether you would need/want the standalone ...
0
votes
0answers
33 views

QGIS road style appears blocky, I want it to appear continuous. Is there a style merge function or something similar? [duplicate]

If you look closely and see the main roads, they break down into blocks [][][][]. I was wondering in QGIS how can I have them appear continuous and not blocked up as shown below. This is one file ...
0
votes
1answer
15 views

Solving ArcMap 10.3 error: 030098

I'm attempting to run the 'generate service areas' tool. I've just created a network following the instructions here using the data from the Utah Automatic Geographic Reference Center here. I wish to ...
0
votes
0answers
21 views

How to cover data by circles, limited by a maximum of values?

I have a regular grid with a cell width of 200 meters (available as raster and vector data set). Each cell has a value from 0 to 2000. I now want to draw circles around these cells in such a way ...
0
votes
0answers
14 views

extract values from raster function taking too long

My task is to extract values from raster A and B from point location file A and B, respectively. Both point location files have 375152482 obs. of 2 variables. The only different is A is in XY ...
2
votes
2answers
31 views

QGIS how to sum a certain vector field inside a polygon and populate a field in the polygon?

I have a polygon with vector point civic addresses inside it. Each civic address has a different number residence. I want to sum the total number of residence inside that polygon and it populate a ...
0
votes
1answer
18 views

Consuming Network Analyst Service not Returning Features in ArcGIS Server?

I am attempting to consume a rest service that I created here. Its just a simple network of streets in the Utah County, Utah area. Basically, it just shows the user the closest EMS service to the ...
0
votes
0answers
22 views

Writing and running scripts using GDAL in Python through OSGeo4W? [on hold]

I don't understand where I can execute scripts in which I use from osgeo import gdal. I have GDAL installed in the OSGeo4W package, but when I set up the Python that is in that directory as the ...
1
vote
2answers
31 views

Adding new features to selection list using PyQGIS?

The code written by Joseph answering to the question Features to stay selected by default in QGIS? layer = qgis.utils.iface.activeLayer() # Use active layer def select(featureAdded): layer....
0
votes
0answers
6 views

How can the “Invalid Precision value” validation be resolved In Enterprise Architect?

I am working with a ArcGIS Database model and I am receiving a validation error on a esriFieldTypeDouble field. The featureclass was export from a workspace document that I exported from ArcGIS ...
1
vote
0answers
28 views

Extracting Ridges from DEM ALOS

I'm currently working on a forestry project for my thesis. It consists of the optimization of skids tracks planification using ALOS images. To this end I would like to extract obstacles such as steep ...
0
votes
2answers
26 views

QGis 3.4.4 Create Atlas - one geometry per page

I have a shapefile with 50 Polygons. I want to create one PDF file in which I see only one polygon per page. I think I have to use the Atlas function. But I don't know how to Setup the filter.
1
vote
0answers
13 views

PyQGIS XYZ Tiles not rendered if jpeg tiles are returned

In a stand-alone/external PyQGIS app that I'm developing I've noticed that wms/xyz tiles that are returned as jpegs don't render on the map canvas but those that return pngs do. So for example the ...
1
vote
2answers
31 views

Iterating over a layer and make MBR for every feature with QGIS

I have a layer with about 20000 polygons in it. The make extent layer command just draws the MBR (Minimum Bounding Box) for the whole layer. I want to make MBR for each of them separately. Is there ...
0
votes
0answers
20 views

Leaflet into SharePoint [on hold]

I need help on how to integrate Leaflet maps into SharePoint 2010? I found ESRI GitHub Leaflet examples (https://esri.github.io/esri-leaflet/examples), but it'll load only the ESRI examples (https://...
1
vote
1answer
58 views

ST_Union in PostgreSQL and QGIS

I have a problem with understanding of the ST_Union (PostgreSQL) and the union function in QGIS. Basically, I have as an example two layers A and B that overlap. The result when using union in QGIS is ...
1
vote
1answer
18 views

Reclassifying field using Python wildcard string search?

I have a point layer with 900K Tree Point records. In that layer I have field (d_Species) that contains the tree species of each record. I've created a field (SpecieValu) to assign a value (0-3) for ...
0
votes
0answers
15 views

How to consider current and next year in google earth engine?

I follow this indication to write this script Intersect of raster image on Google Earth Engine My problem: I would like to combine Hansen dataset with other two different maps (b and c) and finally I ...
0
votes
1answer
5 views

MapBox Text Layer is adding multiple text instead of single centered text

I am trying to use data from my tileset (.zipped shape file) to show Text Label over my tile layer. However, instead of adding a centered label, it's adding multiple-texts sometimes. For example 38 ...
0
votes
0answers
13 views

QGIS Compiling 3.6.0 Troubleshooting about PyQt5, SIP, Qscintilla

I work on UBUNTU 18.04 LTS/bionic, I am trying to compile QGIS 3.6.0, for an upgrade from QGIS 3.2. 0. I am facing the same trouble as several people the release compatibility between SIP and PyQT5 ...
-1
votes
0answers
16 views

Add vehicle GPS data to ArcGIS Geoevent [on hold]

I want a tutorial that shows how to integrate real-time data from a car's GPS to track with GeoEvent from Esri.
0
votes
1answer
13 views

Location is not accurate when replicating an existing feature and zooming in

I am trying to resolve an issue with the accuracy of a selected point using queryRenderedFeatures. The accuracy is fine when zoomed out, but when zooming in it appears off. I am using the ...
2
votes
0answers
27 views

“bending” lines to a predetermined shape

I have a dataset with AIS-transponder information. A AIS-transponder is a digital system onboard a ship that sends/receives information to/from the vessels within range of the VHF transceiver in a ...
0
votes
0answers
18 views

Eliminating directional arrows on v short lines using ArcMap? [on hold]

I am not interested in displaying direction of flow from short lines like catchbasin to sewer main but when I export the pdf map it always includes these arrows? I tinkered with line properties, ...
0
votes
0answers
11 views

Why qgis2web project is not displaying one WMS(OSM) in some machines?

I have an HTML page generated by the plugin qgis2web. It has three WMS services in it. In my computer, all of them work fine. But there are some computers in which the WMS of the OpenStreetMap is not ...
2
votes
1answer
19 views

Managing custom projections

I am developing a mining sampling database. There will be many project specific, user created projections. Typically they will be Oblique Mercator defining a local coordinate projection system. ...
0
votes
1answer
25 views

Boundary point snapping post process - QGIS/PostGIS [on hold]

I have a set of polygons that have been digitised without snapping I want to achieve this after the event such that shared boundaries share common points. I have QGIS and PostGIS At present the ...
2
votes
1answer
30 views

Getting rid of cells of 0 values in raster using QGIS?

I have a DEM like below image. The black area shows 0-values. I want to remove cells of 0-values in the raster.   In raster calculator, I wrote con("demclip_re@1">0,"demclip_re@1") but it gives "...
0
votes
1answer
33 views

Automatic polygonising in QGIS? [duplicate]

I have multiple points and I need to create polygons that consist specific amount of points. How could i do this?
0
votes
0answers
30 views

QGIS data loss line shape

I have a problem with a mysterious data loss in QGIS 3.2.0. I have a line shapefile with multiple features in it. Eventually with no visible reason a big part of the lines vanished from the map. It ...
1
vote
0answers
11 views

GDAL rastercalc giving unexpected results

I have a raster file containing the following values: data values from 0 to 8488 nodata values values equalling -3.40282347e+38 The values equalling -3.40282347e+38 are presumably supposed to be ...
0
votes
0answers
28 views

Using import photos plugin in QGIS?

I have some geotagged photos saved on a network drive which I want to import into QGIS 3.2. I have installed the import photos plugin. I have gone through the import photos process and selected the ...
0
votes
2answers
36 views

OpenLayers adding/removing layer when checkbox is changed

I am trying to add and remove layers2 layer when checkbox is changed. How can I do it with jquery? Following my way i get: Uncaught ReferenceError: layers is not defined var wmsLayer2 = new ...
0
votes
0answers
13 views

Attach Textarea to Leaflet Draw Rectangle to drag with rectangle

I am trying to revive some of the code of Leaflet-Illustrate: It uses some Leaflet code that I believe is attaching hooks by using this: statics: { START: L.Draggable.START, END: L....
-1
votes
1answer
19 views

Creating weighted sum analysis using DEM and population data using QGIS?

I have a shapefile containing population points for Vietnam, and I am aiming to perform a weighted sum analysis using a Digital Elevation Model. Basically, I'd like to combine elevation, population ...
0
votes
0answers
24 views

Python error, creating training area

I'm using the last version qgis, 3.6 Noosa, I got the following error, while trying up to save the training signature class using scp plugin. Any suggestion. An error has occurred while executing ...
0
votes
1answer
20 views

Importing a georeferenced DWG/ DXF into QGIS

I work in an ecological consultancy and we would save money on mapping tiles if we could import DWG files into QGIS, they must be georeferenced however as we need to draw on various habitats ...
0
votes
2answers
24 views

Google Earth Engine exported image looks different from map rendered on screen

I am creating a composite image of Landsat 8 OLI of Okinawa and want to export the true color image to my google drive as a tif file. I was able to successfully download it, but the image (img2) looks ...
3
votes
3answers
190 views

Assign a specific color to vector layer based on RGB codes in attribute table

I use QGIS and have a geological map for a large area. I present this after ID codes based on the geology ("Geokartnr" in photo). I want to use international/nation color codes for each rock type, ...
0
votes
0answers
14 views

JAXA data 30x30 meter to 3D dxf/dwg [duplicate]

I imported JAXA data in QGIS 3.4.5 as a raster. I can extract contours etc., but when I export the contours to DXF all elevations are set to 0. Is there a way to keep the 3D data so I can use it for ...
0
votes
1answer
25 views

Slope is not consistent with the elevation of DEM and seems to be incorrect

I have a DEM image which shows the elevation is from approx. 81 to 103. I expected the slope should be 0-22m. However, the result from DEM-Terrain Model-Slope is from 2.5 to 13.2. Anyone knows why?
1
vote
1answer
15 views

Cutting area from polygon in Google Maps API? [on hold]

I found this example here. var map; function initialize() { map = new google.maps.Map( document.getElementById("map"), { center: new google.maps.LatLng(37.4419, -122.1419), zoom: 13,...
1
vote
0answers
17 views

In QGIS 3.6, where is the “Enable 3D renderer” vector layer property?

In QGIS 3.4 I could enable the 3D renderer for a vector layer (properties/3D view/enable 3D renderer). I can't find this option in QGIS 3.6 anymore. How can I activate this again for a vector layer?
0
votes
1answer
25 views

Different area values from Zonal Geometry and Tabulate area

I am working on Landcover map for Ghana. I calculated the area of each landcover type with Zonal Geometry in ArcMap. Then I wanted to know the area of landcover in each region (as in location). But ...
-1
votes
0answers
12 views

Calculating canopy model (CHM) using QGIS Raster Calculator?

Is it possible to calculate canopy model (CHM) with raster calculator from such input data? (DSM1 + DSM2 + DSMn) - DTM Or, is it necessary to merge DSMs first?
0
votes
0answers
19 views

Smoothing pixels only in a specific area [on hold]

I'm currently working with a DEM and wanna use the gdal_fillnodata tool to fill the nodata areas (which are 2 rivers and one lake) but there are a few default values in the DEM which lead to a bad ...
1
vote
0answers
13 views

QGIS 2.14 c++ standalone application crashes using QgsMapToolIdentify

lResultList.append(mpIdentifyTool->identify(lCoord.x(),lCoord.y(),QgsMapToolIdentify::TopDownStopAtFirst, QgsMapToolIdentify::VectorLayer)); leads to crash of app. It happens when layers provided ...
1
vote
0answers
23 views

Recovering shapefile with green question marks?

I have a shapefile with a green question mark in the ArcCatalog. The shp-extension in the shapefile has 0Kb size Is there any way to recover the corrupted file?
-1
votes
1answer
28 views

Writing Python script to delete multiple fields in multiple files but keep certain fields?

I am needing to be able to run a python script on a folder full of shapefiles to delete multiple fields in the attribute tables. But I want to be able to keep 3 fields (Crop_Type, Acres, and ...
0
votes
0answers
13 views

Using to_dms creating a second grid in QGIS [on hold]

I am trying to create a second grid layer. I currently have UTM grids on my map but want to put lat and long graticules for both x and y axis. How can I achieve this? I have been attempting to ...

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