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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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11 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?
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1answer
44 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
30 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
14 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
25 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
25 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 = ...
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3answers
69 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
38 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 ...
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1answer
20 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 ...
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1answer
28 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
19 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 ...
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1answer
30 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
34 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
37 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 '...
2
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1answer
65 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 ...
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1answer
39 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() ...
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2answers
64 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())....
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1answer
78 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
52 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
186 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
34 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
46 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
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1answer
25 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
39 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 (...
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1answer
29 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&...
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1answer
141 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
301 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 (...
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0answers
17 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 ....
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1answer
117 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 ...
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0answers
37 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/...
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0answers
89 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 ...
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0answers
24 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 ...
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2answers
132 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
21 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
votes
1answer
287 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 ...
2
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0answers
58 views

Create filter expression by selected elements?

Is it possible to automatically create a filter expression for the Query Builder by selected elements?
0
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0answers
61 views

ArcGIS not properly tracing a shapefile's polyline feature

I am working with the Street Network Database shapefile from the City of Seattle, in ArcMap 10.6.1. I attempted to use ArcMap's trace function on the polyline representing Rainier Avenue South. ...
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0answers
22 views

Removing labels for deleted point features in ArcGIS Pro?

I am new to ArcGIS pro. I have a number of points on a map that have been inputted into ArcPro from a KML file. I have deleted some of the points as they aren't required but the labels for the deleted ...
0
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1answer
139 views

Find index of Linestring element at feature, when hovering - openlayers/GeoJson

I have a Geo-JSON Linestring, this is drawn by 800 elements in OpenLayers 4.6.5. I'am trying to use the map.forEachFeatureAtPixel, and print a pop-up when hovering for individual elements on the ...
4
votes
2answers
338 views

Is there a maximum number of features that QGIS can save into a shapefile?

I have a very large .gdb that I want to reduce to my study area. Unfortunately, the study area is still quite big. I could select features that intersected my study area but when I tried Export > ...
0
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1answer
153 views

NDVI time series based on UI selected features

I am trying to create drop downs that will select features from a feature collection, and have each newly selected feature drawn on the map. I want to have three selectable variables then calculate ...
0
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1answer
89 views

How can I add a featureCollection to another one to export into one sigle .csv file?

Sorry if this is an silly question, as I am starting to work with GEE. I am iterating (mapping) over a Sentinel-2 image collection, using different coordinates and dates in each step. My goal is to ...
1
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1answer
375 views

Highlighting selected geojson feature and return to previous state when another one is selected using Leaflet?

I've a map with a geojson layer containing markers, polygons and lines. I made a module so that when a feature is clicked, its properties are displayed in a frame and not in standard Leaflet popup. ...
2
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1answer
193 views

What does this symbol mean?

I have just used the shape tool to create an elliptical buffer around a point. However after doing this, within my layers table I have the symbol seen within the figure below (seen in red box). Note, ...
1
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2answers
762 views

Leaflet - How to show feature properties in a box that is not a popup?

Popup giving features properties are interesting but I would like to make a side bar where properties of a clicked feature would show. I've got the traditional code for displaying geojson features ...
0
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1answer
269 views

How to filter a feature collection to only features ENTIRELY inside another feature

I have 2 feature collections. One of the "departamentos" of Argentina, and another of the "provincias". These are internal political boundaries. The "departamentos" each belong to only one "...
-2
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1answer
40 views

Filter four features from a vector shapefile to create a new layer to perform buffer, intersection and union on it, in QGIS 2.18?

From a dataset that contains points of interest defined by type of object with four different features, I am trying to distinguish the features to perform different analysis. Thought I had to filter ...
2
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1answer
52 views

Running into endless loop when adding feature to layer with pyqgis

I am working on a script where I want the user to add feature to a layer in edit mode, and then decide whether to keep the newly added feature in the layer or not. I am doing it the following way: ...