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74 views

QGIS one to many join issue

I already asked in previous question QGIS table join issue, how to join shape file data and CSV data which contain multiple SAME ID for one object? Shape file contains columns: object id, area, ...
0
votes
1answer
13 views

Automatically assigning bins for vector graduated classes within a given range (QGIS 3)

Is there a way to assign graduated bins automatically for vectors within a given range in QGIS3? I am trying to produce a series of maps which share a same legend, but do not necessarily exhibit all ...
2
votes
0answers
39 views

Histogram matching in Google Earth Engine?

Does anyone know if there is a more GEE-friendly way of achieving this? I'm experimenting with S1 SAR image histogram matching in GEE and was wondering if foremost the code can be improved. Read here ...
-1
votes
0answers
15 views

qGIS Embedded Layers Not Persistent [on hold]

Documentation asserts "The Import button allows adding layers loaded in the map canvas into the Embedded layers list. This allows to later remove those layers from the Layers panel without breaking ...
0
votes
0answers
10 views

Performing cs2cs datum transformation using GDAL?

I'm using GDAL 3 to perform datum transformations. I'm trying to transform coordinates from a local datum to WGS84 using the following command: cs2cs +proj=latlong +ellps=clrk80 +towgs84=-166,-15,204 ...
0
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1answer
20 views

Draw a spatial grid with the lat/longs at the center of the grid using R

I looked through multiple posts on the same, and most of them end up drawing a grid connnecting the points or a grid connecting the bounding box of the coordinates. I need a grid with each of these ...
0
votes
0answers
32 views

PostGIS DLLs could not be loaded but they are there

I've got DLL loading error when trying to restore dump files. I'm on PostgreSQL 11.5 (64bit, of course) and last time I checked all DLLs it claimed are exactly there already. ERROR: could not load ...
1
vote
2answers
51 views

Coordinates of image corners for ImageExtent in Openlayers 5?

It is possible to get the coordinates of the four corners of the image, given the center of the image coordinate? or the bottom left and upper right corners? Currently, I am center the map in the lat/...
2
votes
0answers
38 views

Extract population density data from a raster by shapefile

I'm trying to extract population density data from a raster by shapefile. I get NaN values, but I think my problem is further upstream at the raster level. I don't do much GIS work, so I'm likely ...
1
vote
1answer
26 views

Difficulty with Scaled Visibility for Labels in QGIS 3.4.9

I am having great fun getting to grips with QGIS (fantastic). I have set myself a "project" to try to learn the techniques. This project refers to 2 Layers (geographic areas for Telephone Exchanges ...
0
votes
0answers
22 views

Performance of merging and applying changes to a PBF file vs. downloading a new one? [on hold]

I am wondering which one of the following two options would be the most performant (in terms of time and space): Download a small changefile (change.osc), then merge the changes with a large file (...
1
vote
0answers
23 views

Union anti-meridian “multipolygons” after re-centering world map

My goal is to create a world map (using ggplot2) with a Pacific perspective. I have managed to re-center the map, by following this solution. Code below: # world country layer sppolys <-...
0
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0answers
28 views

Copying Shape_Length and Shape_Area data (replace geometry tool) to other rows, or suitable alternatives using ArcMap?

I am working on mapping extents for historical construction plans using ArcMap 10.6. I have sets of these blueprints that I must draw out dozens of similar polygons using the replace geometry tool, ...
0
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0answers
18 views

Generate accurate concave hull for data sets in R [on hold]

I was trying to generate the concave hull of my data set using concaveman function. Here is my data: According to the shape, I would expect the concave hull looks like a band. However, after I run ...
2
votes
0answers
16 views

Adding WMS or WFS services to Google Earth Engine

I'm new to using Google Earth Engine. I would like to know if data from WMS or WFS services can be added to this platform. I need this information to do a data validation The information is on the ...
1
vote
0answers
8 views

Path Finding for Polygonal Map Representation

I'm figuring out a way to find the shortest path given a source and destination. My map is a building's floor plan. And I represented my map using polygons like of below: class Polygon(){ String ...
1
vote
1answer
44 views

Interpreting JSON lat/lon data from an ESRI interactive map?

I got access to some data from an ESRI-based interactive map and I am trying to make sense of the data. In particular, I'd like to extract the geometry of some shapes. Below is a snippet of the JSON ...
0
votes
0answers
15 views

Landsat mask shadows due to rugged topography in Earth Engine

I am working to produce a snow duration map in GEE, but since the area of interest is mountainous I am having trouble with north-facing slopes. I've learned that a solution exists for Sentinel in ...
0
votes
0answers
21 views

Leaflet: Unable to filter GeoJSON beyond the `properties` element level

I have the following code which displays a Layer in my Leaflet map from some remote GeoJSON: // Create Layer: Airspace var featuresUTMAirspace= L.geoJson(dataGuardianUTM, { filter: FuncAirspace, ...
1
vote
0answers
15 views

Setting FontFamily in OpenLayers Text Label

Changing the font-Family of a style objects' text label does not have an impact - it always looks the same, no matter what font-family I set. Do I have to provide the respective fonts to openlayers ...
3
votes
1answer
29 views

Where is attribute form widget saved

When i create widgets for the attribute form in the properties of a layer: Is this stored in the geopackage layer or in the QGIS project file?
0
votes
1answer
40 views

Handling popups with overlapping layers in Leaflet

I have two polygon layers (polygons) that overlap. I've created a leaflet map using qgis2web. The issues is that, if I click on the overlapping area, the popup only shows information for the topmost ...
-1
votes
0answers
16 views

How to barplot select values in columns in R [on hold]

I essentially want to make several barplots that have the y axis as number of individuals by x axis as Ages from 1-9, for a particular year they were sampled at a particular site, for a particular ...
0
votes
1answer
27 views

Replacing three parts string in FME?

How to replace three parts string with (like John Doe Street) to form where first word has only one letter like (J. Doe Street)? I am using FME (StringReplacer) so RegExp should be fine method for ...
3
votes
1answer
38 views

QGIS: Split with lines does not fully work

I'm using QGIS 3.8 and I've got two shape files which I would like to cut in pieces using Split with lines Both times I used the algorithm the first two lines did not cut through my shapes, while the ...
0
votes
0answers
27 views

Show image (photo) which is stored as base64 in ArcGIS

I have a PostGIS table which stores point data with images as attribute (in base64 data type). I would like to show the pictures from the column "bild" of the attribute table which look like this in ...
1
vote
1answer
24 views

Is there any function that can calculate the maximum minimum distance from a geo object to multipoint?

I am working with postgis 2.0 and I would like to calculate the maximum minimum distance from a point set (multipoint) to a polygon. It seems that neither st_distance nor st_maxdistance can meet my ...
1
vote
0answers
28 views

Error Finding proj.db using GDAL 3.0 With MapInfo v.15

I am using GDAL 3.0, MapInfo v.15, Visual Studio 2015, and c#. Recently I updated from Gdal 2.2 -> 3.0. Since then when I use aerials to create a pdf report and then upload to S3, I receive the ...
0
votes
0answers
6 views

Problems displaying DTED data as tiles [duplicate]

I've enabled the GDAL extensions on Geoserver and I'm able tom import *.dt2 data which is then rendered by Geoserver. Everything is fine as long as the output is WMS, but as soon as I enable the tile ...
1
vote
1answer
27 views

How to get the intersected region(s) of multiple polygon layers

I have multiple layers with polygons. I want the regions that are intersected by all the polygons. The shared, common regions. An example use case would be finding the shared area of multiple raster ...
0
votes
0answers
14 views

Insert row into MapInfo table using c# and MapInfApplication object

I am attempting to insert a record, then eventually update a record using the MapInfoApplication object in c#. I can currently read the table contents out into a listbox in a windows forms ...
2
votes
2answers
61 views

Tools for georeferencing PDF's [on hold]

5 years ago I exported all our PDF record drawings to TIFF and georeferenced them using Esri Arc Desktop. This added the .tfw file associated with georeferenced images without modifying the original ...
0
votes
1answer
29 views

How to create an editable personal copy of a read-only PostGIS layer in QGIS 3.4

I have a few vectory layers in a PostGIS database. I want to give the other users of the database read access to these layers. I don't want them to be able to alter them, though. Instead, if anybody ...
0
votes
1answer
15 views

Arcpy UploadServiceDefinition ignores folders and groups

I am using Esri's guidance for arcpy.UploadServiceDefinition_server (http://desktop.arcgis.com/en/arcmap/10.6/tools/server-toolbox/upload-service-definition.htm) I can successfully upload a service ...
0
votes
0answers
6 views

Melowntech VTS Mapproxy: Cover the poles

I'm working with Melowntech VTS Mapproxy as part of their Geospatial Stack. I would like to display a bound layer of TMS tiles, in this case from Bing Maps. Therefore, I completed their tutorial ...
2
votes
1answer
43 views

How to set CRS of many rasters in R

I have a set of rasters that I've had trouble reprojecting to Robinson. It fails without errors, the crs changes but the extent doesn't convert to metres and it doesn't plot properly. Sources say EPSG:...
0
votes
0answers
24 views

ERROR 999999: Error executing function. Failed to execute (CADToGeodatabase).What is the issue? [on hold]

import arcpy try: arcpy.env.workspace = "D:\PROJECT DETAILS\Database_Onsite\New File Geodatabase.gdb" Database = arcpy.env.workspace Drawing_Cad_File = "D:\PROJECT DETAILS\Database_Onsite\...
0
votes
0answers
7 views

Terminal connection error when running v.net.steiner

I am using GRASS 7.6.0 on a CentOS server. I've attempted to run the v.net.steiner function on the map layer with the following properties: Layer/table: 1/network type count min ...
0
votes
0answers
24 views

Confusion over when files are saved in ArcGIS Pro ModelBuilder?

I am using the ModelBuilder, as you know there are 2 ways of running: either in the ModelBuilder (1) or as Geoprocessing tool (2) https://pro.arcgis.com/en/pro-app/help/analysis/geoprocessing/...
0
votes
0answers
9 views

Export CSV file from widget without headers for each item

I have edited the eDraw widget from Web AppBuilder for ArcGIS Developer Edition, but am not very familiar with JavaScript. The goal of the widget is for the user to draw points on a map and be able to ...
0
votes
0answers
20 views

EWKT Support in GDAL/OGR CreateGeometryFromWkb

We're using geoalchemy2 Geometry Columns to store points to a postgis DB. The Column seems to return an EWKBElement which ogr fails to interpret correctly as the following test shows: import binascii ...
2
votes
1answer
39 views

ST_Distance does not give nearest node

I am trying to find the nearest point on the road network closest to a given point. I imported the road network into PostGIS from QGIS and am using the SQL window in QGIS DB Manager to query the road ...
0
votes
0answers
25 views

Calculate median for a vector field in SAGA GIS or ArcGIS [on hold]

I would like to find the median of an attribute field of a shapefile. I can use ArcMap or SAGA GIS. In ArcMap the Sum Statistics only provides the mean value, same for the Table Description in SAGA. ...
1
vote
1answer
16 views

Set schema in ogr2ogr from GML to pgdump

My ogr2ogr tranformation from a GML to a pgdump sql file always by default uses the schema public. I would like to use a different schema. It seems to be possible: How to assign a schema to ogr2ogr?. ...
0
votes
0answers
17 views

Getting node way relationship from Osm2pgsql data

I would like to ask what is the best way to extract which way a node belongs to given a Postgresql databased generated by Osm2pgsql. For example, in https://www.openstreetmap.org/node/4961890042, ...
1
vote
0answers
13 views

Show QGIS layer definition (qlr) filename in my project not the source file it was created from

I have a QGIS project with multiple qlr (layer definition files) in it which all source the same original data but all have different styling, labeling and filters applied. But when I bring these qlr ...
1
vote
1answer
49 views

Raster Combining in batch using ArcPy?

I am trying to combine two different raster files using a loop, with the following script. import arcpy import os thectr = 0 ws = arcpy.env.workspace = r'D:\BRB Snow Cover\Sample\TerAqua' ...
1
vote
2answers
27 views

Reclassifying Raster Value Classes based on pre-defined function using ArcGIS Spatial Analyst?

I have this distance raster (shown in the image below). Is it possible to reclassify the distance values based on the description below- For distance values 0-100 (new value decreases linearly from ...
0
votes
0answers
14 views

Making map with country names using Cartopy? [on hold]

I'm trying to print a map of Europe with the names of the countries, but I can't find how anywhere. It would also be nice if I could edit the country names.
0
votes
0answers
23 views

When re-saving a GeoJSON file to a shapefile, the .dbf significantly increases in size

When re-saving a GeoJSON file to a shapefile, the .dbf significantly increases in size to the point where the file size becomes unmanageable. For example, I re-saved a 250 MB GeoJSON file to ...

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