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Questions tagged [features]

Use this tag when asking questions about a representation of a real-world objects on a map.

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1answer
49 views

Batch process for merging features in multiple layers

I have multiple (50) layers representing rivers and creeks which are polylines. However, they are broken into line segments so each river/creek layer might have 30 or so features within it. I know ...
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1answer
54 views

OpenLayers 5 forEachFeatureIntersectingExtent Method Not Correctly Selecting Features in Circle or Polygon?

Using OpenLayers 5.3.3 Draw a circle Get the extent of the circle in the drawend event: const extent = event.feature.getGeometry().getExtent(); The try to determine the features in the extent using ...
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2answers
49 views

Python GeoJSON - TypeError: string indices must be integers

I am trying to iterate JSON objects and append selected features to new GeoJSON using geojson Python library. When hardcoded the script works fine. But when append method is used in a for loop I get ...
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2answers
81 views

How to change the color of a feature with pyQGIS?

I want to iterate through a field and based on the attributes, assign a color to the feature. I can find how to change colors of a layer, but not for a single feature. Code below. from PyQt5.QtGui ...
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1answer
30 views

Export image collection to pixel value across bands

I am trying to export an image collection to a 2D table where : axis 0 are pixels over the collection axis 1 are bands from the image collection I would loose spatial information, as pixels would ...
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2answers
48 views

How to Identify/Select features from WMS?

I'm trying to extract some features from the following WMS: http://servicios.idee.es/wms-inspire/hidrografia Namely, one layer called "Red hidrografica", which contains the traces of rivers and ...
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1answer
24 views

Date of reference in an feature collection

I am pretty new on GEE and idk how easy is this task. I want to find daily precipitation for all Brazilian municipalities in 2006. I applied a map function with reduce regions and end up with a ...
2
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1answer
28 views

Choosing point from polygon (featurecollection) in Google Earth Engine

I want to get points from the polygon. If I just use function (randomPoints), each polygon does not have the same numbers (50) of points so I want to find the point from each polygon, but my code is ...
1
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1answer
39 views

Ordering FeatureGroups

I'm using Leaflet right now and I have issues on ordering a list of FeatureGroups. Each feature group is either an imageOverlay or a list of Features I tried using bringToFront / bringToBack and it's ...
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2answers
34 views

Leaflet filtering GeoJSON properties greater than and less than some value not working

I would like to raise the query, that I haven't seen before in spite of a lot of problems regarding to GeoJSON features filtering by properties. This is using the formulas such as Greater than, lower ...
1
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1answer
26 views

Advance text style of feature in openlayers

Is there any way to create table or any html element in text style for features? i tried other ways like putting overlay on feature then in overlay i used table and html elements but had some problems ...
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0answers
13 views

Copying Features from multiple sources

I'm new to Python and trying to automate copying specified features from a bunch of nested geodatabases into a new geodatabase- script seems to work ok, except for the copying features part (the 2 ...
1
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1answer
25 views

Features disappear from layer

I have a problem with my newly created layers. I have drawn a lot of features and most of them disappeared during the weekend while the pc was turned off. They are not visible in the drawing, in the ...
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0answers
21 views

How to obtain *.osm file by OSM relation ID?

I know an OSM relation ID for some multipolygon feature. How can I obtain *.osm file for the feature?
1
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1answer
58 views

Defining polygon's area from OpenStreetMap

In OpenStreetMap, I have a multipolygon OSM feature with its relation ID 6040040 (example). How do I calculate the area of a such features using QGIS?
2
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1answer
47 views

Some features listed in attribute table not visible on map in QGIS

My vector layer is a track file with points every 2-3 seconds. When added they all appear in the attribute table but not on the map view. There doesn't seem to be a pattern or any attribute that ...
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0answers
21 views

Number of features does not match for my classification of each pixel

I'm running a rating on a my clip from Sentinel-2 as a reference to the diagram shown on: https://github.com/ceholden/open-geo-tutorial/blob/master/Python/chapters/chapter_5_classification.ipynb ...
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1answer
44 views

OpenLayers 5.3 selected point feature does not return properties, but polygon does

I am having some issues in OpenLayers 5.3.0. The context is that I'm using Sharepoint lists as a backend to save feature data and OpenLayers is running in a Vue.js container. Everything works as ...
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1answer
42 views

Add GeoJSON features from an API call in OpenLayers 4, layer not displayed

I'm trying to create a little demo to show the data from our API into a map but I cannot see my layer Here my code, is just basic for the moment, we just need to display the data: const projection = ...
2
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3answers
126 views

QGIS feature form : Force attribute to save as uppercase

For example I have feature form with colum name NAME (with names of contries). I want that all counties names are in capital letters. As users enter the names in lowercase, uppercase, mixed ... I ...
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0answers
39 views

Convex Hull not outputting expected number of features

I have a .csv file with observations of various species and I want a polygon to illustrate the area where those species occur. I ran the Convex Hull, grouped by the species' names field, which ...
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0answers
31 views

Splitting large amount of features using arcpy

We are publishing a geoprocessing service that will split a large amount of features in a file geodatabase. The script uses the arcpy.defense.SplitFeatures() method, a ResourceSrf layer or a user ...
0
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1answer
35 views

Calculate feature extent OpenLayers?

I have a feature created from Well Known Text as following: var feature = format.readFeature(wkt , { dataProjection: 'EPSG:25830', featureProjection: 'EPSG:25830' }); When I add it to a ...
1
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1answer
40 views

Setting OpenLayers line labels by angle?

I want to write labels near linestring features on my map. I calculated but it works wrong. My layer style function is like following: layerFeatures = new ol.layer.Vector({ source: ...
2
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1answer
29 views

QGIS3 - Fast jump to another feature

I am looking for a method (plugin) to choose next feature of my vector layer really fast. I need to edit a lot of polygons and fast choosing next record is really necessary (using arrow or something ...
1
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1answer
34 views

How do I change style/colour of a few selected features?

We have features which represent the locations of pupils within the local area and would like to change the colour of these features to represent whether they reside within the catchment area of a ...
1
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1answer
55 views

Split polygons by area/percentage with QGIS 3.x

Is there a function in QGIS 3.6 Noosa that allows me to split polygons with given area or percentage? There is a plugin for QGIS 2. "split polygons" that seems to have exactly what I'm looking for, ...
2
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1answer
59 views

Creating one table out of multiple feature collections and two properties?

I am trying to export one table out of the 18 feature collections I have created, each feature collection has the same geometry (counties of the state of California) and has the County ID (property '...
3
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1answer
108 views

How to change the field value of a specific feature in a Shapefile using GDAL/OGR?

I am trying to change the field value of a shapefile, but only in some specific features. However the code I have changes the value for all features in the shapefile. Is there any way of accessing the ...
1
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1answer
51 views

How to break bond of select and modified feature OpenLayers

I have select and modify interaction instantiated. Also I have event onChange binded to selected feature. select.getFeatures().getArray()[0].on('change',function (){ sources.verteksi.clear() ...
1
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2answers
75 views

Why is the order of my features changed when using readFeatures in OpenLayers v4.6.5?

I have a geojsonObject that is a featurecollection of X number of features. see picture I Then add this to a vector: var Source = new ol.source.Vector({ features: (new ol.format.GeoJSON())....
1
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1answer
146 views

Make FeatureCollection from Features in Google Earth Engine

I try to add a list of Features into a FeatureCollection with ee.FeatureCollection but it raises the following Error: * "FeatureCollection (Error) Collection, argument 'features': Invalid type. ...
1
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1answer
76 views

Store geometry change on modify interaction OpenLayers

I am using OpenLayers modify interaction with events modifystart and modifyend. I am trying to remember state of feature before it is modified. I do it this way: var modificirane_cestice=new Object()...
3
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1answer
477 views

Selecting features from multiple layers for export QGIS 3.6

I have multiple features I want to select over multiple layers and then export these selected features to a new layer. The 'Multiple Layer Selection' plugin is not supported by the QGIS 3.6 so that ...
0
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1answer
36 views

Centering Feature before exporting map to PDF?

I am trying to export single point file maps to PDF. My maps are exporting fine, but I'm having trouble centering the point file in the middle of the map, it's always outside of the data frame. Any ...
1
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1answer
59 views

Creating 1 hectare rectangle polygon surrounding points and dividing it into equal sized sub-quadrats in ArcGIS Desktop?

I have a set of points like this: ] I have only these points' information. Now I want to draw a boundary of this points whose size should be 1 hectare (100m x 100m). After that, I want to subdivide ...
2
votes
1answer
36 views

Adding featureSet into a featureLayer (dynamic renderer)

I'm trying to use a renderer and a legend on data from a featureSet, it displayes symbols and popups but the renderer fails. The data comes from a featureLayer but I display it with view.graphics so ...
2
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0answers
40 views

Slow retrieval of features

I have a vector layer with lots of features and I'd like to create a new layer in Python, containing only a subset of those features. To be more specific, I downloaded OpenStreetMaps data of Austria (...
1
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1answer
79 views

Retrieve features from WFS using geotools

I am new to GI systems. I am trying to retrieve features from a WFS using geotools: this is my snippet : String url = "http://geodaten.metropoleruhr.de/poi/poi?request=GetFeature&service=wfs&...
0
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1answer
313 views

Create GeoJSON Feature from FeatureCollection

I have a single polygon feature (no holes, no overlaps) which is currently defined as a FeatureCollection in GeoJSON, with type Polygon (not MultiPolygon). I am trying to use it with an online mapping ...
1
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1answer
530 views

Openlayers 5: view and save coordinates from drawn feature

I've been following the various examples including this OpenLayers: Get Coordinates of drawn features and this https://openlayers.org/en/master/examples/snap.html and have produced the code below (...
0
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0answers
21 views

Create polygons for pixelboundary in Google Earth Engine

My goal is to get the Percentage of Class Values from a fine Raster into a Feature Collection, for Each Pixel of a Coarser Raster I am Stuck at Creating Polygons per Courser Pixel (in Red) to use ....
0
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1answer
204 views

How to get individual features from a GeoJson-Multipoint feature using map.on('click'…) in openlayers 4.6.5

I'm trying to get the features of each MultiPoint-point when i click on a point in my openlayers map (4.6.5). The points shows on the map. I want to add a pop-up on each feature when i click on the ...
1
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0answers
44 views

Supervised Classification within the bounds of a FeatureCollection

I am a bit new to classification within GEE and was hoping to get some help regarding classifying within a specific region. var bands = ['NDVI']; var landSat = ee.Image(ee.ImageCollection('LANDSAT/...
0
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0answers
125 views

ogr2ogr: How to export / explode GeoJSON features from collections into separate files

I would like to use an ogr2ogr command to export features as multiple separate geojson files from a single GeoJSON feature collection. I have tried using the -explodecollections command but I am ...
0
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0answers
28 views

Using feature templates for other layers than original to change target layer in ArcMap?

I was wondering if there is, in ArcMap 10.6, any way to use feature templates in a different layer than the one they where created for. I have around 10 layers with similiar atribute tables (same ...
1
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2answers
173 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....
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0answers
22 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 ...
4
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1answer
482 views

Deleting features in PyQGIS?

I am comparing geometries of input layer and output layer features. I want to delete features in output layers which has equal geometry to input feature. I am using following code to do that. for ...
1
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1answer
41 views

Counting features within other features

I've several files composed of elements like the one below which I'm trying to make sense of (essentially a very simple microtopography study). I've vectorised the image with lots of separate lines ...