Questions tagged [features]

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

102 questions with no upvoted or accepted answers
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votes
1answer
967 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 ...
4
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0answers
1k views

Rotate feature by angle (QGIS)

Trying to offset a line by 10 degrees, rotating around an endpoint. I've read up on the older plugins and the new Rotate Feature tool, but am having trouble. I am using QGIS 2.8.9 Wien, reinstalled ...
4
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0answers
570 views

QGIS “Align Edge” equivalent?

I'm trying to move from Arc to QGIS, and spend a lot of time making maps out of polygon features. One tool that I can't find is an equivalent to ArcGIS' topology tool "Align Edge" - is there such a ...
4
votes
1answer
744 views

Missing features from featureCollection in Google Earth Engine but present in Fusion Table

I am using google earth engine code editor to extract some band values at specific point locations. To do so I have loaded my .csv file with point IDs and coordinates into Fusion Tables and the Map ...
3
votes
1answer
35 views

ReduceRegions not writting to feature properties in GEE

I am trying to apply reduceRegions to extract average precipitation from the TerraClimate dataset (developers.google.com/earth-engine/datasets/catalog/IDAHO_EPSCOR_TERRACLIMATE) within each polygon of ...
3
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0answers
47 views

Applying graduated symbol renderer only on some features using PyQGIS

I have set up a graduate symbol renderer (QGIS cookbook - Graduated Symbol Renderer), and I am now trying to make it conditionally applied to some features only, depending on one (or more) attributes. ...
3
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0answers
793 views

Modify features not updating on vector layer

I have point vector layer in my application.Now I am trying to modify its coordinates. I am able to do it but its not reflecting on layer. Here is code I am using : var selectInt = new ol.interaction....
3
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0answers
71 views

problem creating and editing features at extent edges

I'm in the process of creating a polyline feature layer of tectonic plates. I'm working with WGS-84 reference system, which means the extent is +-180 in lon, and +-90 in lat. In order to create the ...
2
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0answers
43 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 (...
2
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0answers
63 views

Create filter expression by selected elements?

Is it possible to automatically create a filter expression for the Query Builder by selected elements?
2
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0answers
64 views

Reverse geocoding geographic features

I have a growing database of routes. Each route is represented by a polyline with say 200 points on average. What I'm trying to achieve is automatic tagging of these routes with names of places and ...
2
votes
1answer
612 views

I keep getting the “Paste Features Failed.” dialog when trying to copy/paste point features in a layer in ArcGIS pro

I have a "plant_species" point feature class, and after a period of time working with the layer, the ability to copy/paste an individual plant_species feature from within the map frame no longer works....
2
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0answers
94 views

How to generate a single kml file for each feature in a kml file?

I have a kml file containing features that I would like to parse out into separate kml files for each feature/header. I'm hoping there is an easy way to do this using geojson.io or QGIS. How can I ...
2
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0answers
95 views

Select features tool- QGIS 2.14

When i select polygon with select tool- the whole polygon colored: i seek a way to select the shape only with outline, as it possible in ArcGIS. I know i can change the opasitiy in "Map Tool" but ...
2
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0answers
67 views

Location of island “Trinidad”?

I was reading a travel diary of an ancestor of mine who describes a cruise from Hamburg to Natal (South Africa) in 1860. At one point a rock island named Trinidad (supposedly only inhabited by animals)...
2
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0answers
815 views

Problem merging polygons in QGIS

I've got a polygon shapefile with 11 features (11 Italian cities) and I want them to merge them into one, however I cannot activate the "Merge selected features" button. Any suggestion about the ...
2
votes
1answer
101 views

Using filters to filter a variable value with GeoTools

I have a Java Swing application which loads a line shapefile and draws a map. I'm using a filter and a rule to filter out the lines in the shapefile where the attribute "traffic" is greater than 500. ...
2
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0answers
661 views

Moving multiple features to snap to nearest edge

I have thousands of long rectangular polygons which I need to align to a specific/nearest edge. The screenshot below demonstrates what I need to achieve: Yellow and white dotted features need to ...
2
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0answers
328 views

Reconstituting features from E00 format, without ArcGIS

Recently I used OGR to convert an ESRI E00 format file to shapefiles. I am dealing with vector data, many polygon features per file. I was dismayed to find that none of the resulting shapefiles(you ...
2
votes
0answers
380 views

ArcGIS API for Silverlight : query that displays layer attributes in a dataGrid

I'm working with ArcGIS API for Silverlight to build a webmapping application and I'm trying to display my attributes in a datagrid. I made a try by using this code : void QueryTask_ExecuteCompleted(...
2
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0answers
289 views

Geoserver Feature Versioning Support

I am creating a map feature editor that supports versioning & rollback using Geoserver as the WFS. From what I've read online, it seems Geoserver supports feature versioning. My question is how ...
2
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0answers
1k views

3D features (Polyline, Polygon) intersection library

For my research I am looking for a (python) library to get the intersection of some 3D features. The features can be Polygons or Polylines. Mostly I need to intersect a plane with my features and get ...
2
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0answers
176 views

Cannot reselect polygon after modify

I've got various vector layers on a OL map. On one layer I have a few draw controls. If I draw a polygon I can select it (the whole pop-up thing works). This also works for all the other features. ...
2
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0answers
64 views

Is there a way to distinguish between digitized and pasted features?

Is there a way to tell if an added feature in QGIS is in fact a newly digitized one or a pasted feature? I think QGIS is treating both cases in the same way, emitting the same signal: ...
2
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0answers
149 views

Is it possible to lock a single feature from editing in ArcObjects?

We're developing an ArcMap addin. Now we need a way to lock a feature from editing/deleting. Is this possible with ArcObjects or do we have to create our own implementation of locking? Example: User ...
2
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0answers
1k views

Change the symbol for a single feature in ArcObjects?

Is it possible to change the symbol for a single feature in ArcObjects? If so how? I know it's possible to setup the map symbology for different field values of a feature class, but I'd like to ...
2
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0answers
225 views

Process to gather raster cells under features

I need to gather individual raster cells underneath a feature in a featureclass as quickly as possible. It seems that most ArcObjects functions have problem with island polygons, multi-part polygons, ...
1
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0answers
46 views

QGIS Features to polygons

I would like to know if there is any equivalent on QGIS for the ArcGIS function 'Features to Polygons': https://desktop.arcgis.com/en/arcmap/10.3/tools/data-management-toolbox/feature-to-polygon.htm ...
1
vote
1answer
40 views

Are there a list of locations or features with known dimensions?

I'm plotting lines and objects on a map and want to verify scales with real, physical objects on the map. Is there a list of physical features that are known distances? Perhaps like the runway at ...
1
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0answers
14 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
vote
1answer
32 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 ...
1
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0answers
36 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 ...
1
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0answers
62 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
24 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 ...
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0answers
49 views

QGis Python featurerequest with lists

I want to select some features and do some actions to this selected features. Something like if attribute in field a is = abc than do something. But the selection will not fit. As written in https://...
1
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0answers
55 views

Splitting feature into fixed measurements

For my thesis I'm trying to split featuring in QGis into multiple new features of a fixed size (5.5 by 2 meters). I think it would be the equivalent of ArcGIS' Parcel Division tool, but unfortunately ...
1
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0answers
126 views

Customizing identify form in QGIS?

Is it possible to customize the identify form in QGIS (I am using version 3) to create Balloon like windows and add a picture in addition to the features extracted from the table?
1
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0answers
52 views

Keep legend item & feature count even when item does not appear in current Atlas feature

I would like to see all legend items irrespective of whether the item appears in the current Atlas feature. I have formatted the legend such that count of each item appears in brackets, next to the ...
1
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0answers
135 views

Obtain the number of features in a Shapefile using NodeJS

I'm using the shapefile NPM library which works well, but it doesn't provide a count of the number of features in a Shapefile. Is there some other library which can access this information (other than ...
1
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0answers
43 views

Change the color attribute of a mulitline layer

I'm very new in world of the shapefiles, i have a code that add point in a multiline layer, but when i open with ArcGis each layer have a different color, and i want that all the layer have the same ...
1
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0answers
253 views

Get feature's geometry from feature Form's argument

Under a pyqgis form, the feature from Form's argument doesn't has geometry . Here the code I used: def formOpen(dialog,layer,feature): geometry = feature.geometry() Geometry return is None. ...
1
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0answers
158 views

feature in the formOpen method of a custom form display two feature object

Qgis version : 2.18.1 I was having trouble when launching a custom edit form because of my use of feature in the formOpen method. I want to get an attribute from the current feature as this: feature....
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0answers
170 views

Feature class - HEC-GeoRAS

I am currently working with HEC-GeoRAS I am trying to import data from a shapefile into the feature class River. I would like to insert a type of data DOUBLE in the attribute ARCLENGTH of the table ...
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0answers
96 views

Why are features added to layers via Python script not being displayed?

I am using PyQGIS with QGIS version 2.18.11. Can layer.addFeature() be used on a layer which is a clone of a layer which was imported from a .xml file? This code throws no errors: def ...
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0answers
33 views

Displaying all features of datapoint QGIS

I've got a SHP file with 6000 features and I would like to click on each point on the map and know what the features are for that specific point. It is a lizard database and doing this would tell me ...
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0answers
626 views

Aggregating image information over two features in Google Earth Engine?

As per Iterating over years for features in feature collection using Google Earth Engine?, I am currently working with the Hansen data (Global Forest Change) in Earth Engine. I have imported two ...
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0answers
223 views

Selecting Feature in more layers and highlighting them using PyQGIS?

I'm developing my plugin and I want after selected some feature highlight them on mapCanvas. My code is below but it does not work correctly, I don't get an error but I cannot view the highlighted ...
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0answers
159 views

how to get (number of) clustered features before map completely rendered?

When you add features into ol.source.Cluster, you can access original ol.Feature object but clustered ol.Feature which is currently displayed on the map. check this codepen with console log. it doesn'...
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0answers
125 views

Allow WFS searches but no total data download

I am using GeoServer and I published some data. I want that users can extract features information by predefined queries but I do not want that they can also download the entire dataset with ...
1
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0answers
46 views

Trouble when append values from attribute table of shapefile

I need to record the values for all fields of a shapefile in a dictionary. When I run a loop that for the first index of list picked up values from attribute table correctly. The problem for the ...