Questions tagged [features]

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

117 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
6
votes
1answer
344 views

Topological editing of two different layers in QGIS

Is there a way to apply topological editing to move vertices between two coincident features that are not in the same layer? For example, if I have a crop land polygon coincident with a soil polygon (...
5
votes
1answer
683 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
0answers
86 views

Changing feature attribute just after adding via QgsFeatureSink

How can I access a feature and change its attribute value, I just added to a processing-output before via sink.addFeature(feature, QgsFeatureSink.FastInsert)? Things like feature.id(specificfeatid)[...
4
votes
0answers
164 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. ...
4
votes
1answer
911 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
0answers
1k 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
votes
0answers
73 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
votes
0answers
44 views

Split features maintaining ordnance survey map details in QGIS

I'm trying to split a polygon drawn over an ordnance survey map area that represents the total land of a farm, in order to create smaller polygons that represent individual fields. I wish to create ...
2
votes
0answers
46 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
votes
0answers
72 views

Create filter expression by selected elements?

Is it possible to automatically create a filter expression for the Query Builder by selected elements?
2
votes
0answers
70 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
0answers
147 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?
2
votes
1answer
1k 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
votes
0answers
775 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 ...
2
votes
0answers
96 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
votes
0answers
96 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
votes
0answers
1k 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
0answers
233 views

Some features are not rendering when applying graduated styling in QGIS

I am trying to style a polygon layer as graduated according to a specific field of the polygon shapefile in QGIS. I selected equal interval or equal count and then sort but when I clicked Ok one ...
2
votes
1answer
137 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
votes
0answers
678 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
votes
0answers
343 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
62 views

Generate layers based on feature values

First of all, I am very new to the GIS world, so bear with me if the question is stupid. I am using ArcGIS and here's what I try to accomplish: I have a feature class (let's call it Areas) storing ...
2
votes
0answers
862 views

how apply an SLD to vector layer in geoTools java

I have been using geoTools 11.2 in Java 1.8 to display a vector layer with a desired style of it in worldwind 2.0. I have read features and styles and created objects. I have my own defined vector ...
2
votes
0answers
381 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
votes
0answers
314 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
votes
0answers
2k 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
votes
0answers
178 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
votes
0answers
65 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
votes
0answers
151 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
votes
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
votes
0answers
226 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
vote
1answer
25 views

Merging zipcodes based on population to create larger areas in QGIS

In QGIS I have a shapefile with small geographic areas (zipcodes) with population in each zipcode area. Currently the population per zipcode vary very much, some as low as 1 person living in them. I ...
1
vote
0answers
34 views

Why feature can't be edited in QGIS?

I am working with shapefiles in QGIS. At the moment I am editing a shapefile with line objects. When drawing a new line it appeared in a different manner then set in the layer properties. Now I can`t ...
1
vote
0answers
27 views

Can we include any URL path for the Shapefile while creating a feature store in Deegree GIS?

I have used the Documentation and the examples of Deegree GIS application and I am able to give the path for my Shapefile in my local system, while creating a feature store just like below. <...
1
vote
0answers
34 views

Aligning raster perfectly with feature using ArcMap

I have a feature layer with 1000x1000m polygons that are seamlessly glued together. From this layer I want to create a raster with 25x25m cells as basis for further raster operations. I'm using ArcMap ...
1
vote
0answers
227 views

Reload table cache in ArcGIS Pro?

In ArcMap, it is very easy to reload table cache where it will call the CSV that was previously used to create the feature class to update the feature with any new data from the same CSV. In ArcGIS ...
1
vote
0answers
53 views

How to update my map with the restored features from JSON format?

I'm trying to implement a CRUD that have a map OpenLayers. First, I drawed and saved the features with writeFeatures(). Second, I'm trying to show the polygon that I drawed, and here is my problem: ...
1
vote
0answers
43 views

Detaching part of feature without detaching all parts from each other?

On this map, Denmark and Greenland are one feature, and I need them to be two features. How do I split them apart? If I use Singlepart to Multipart, I create a new layer where there is a feature for ...
1
vote
0answers
88 views

How to set my own QDialog Form instead QGIS QgsAttributeForm

I'm working in a QGIS plugin which its functionality is to facilitate the creation of custom attribute forms with complex logic to QGIS users without python knowledge. In order to do this, the user ...
1
vote
0answers
78 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
0answers
721 views

Add feature ID to feature collection Google Earth Engine

I have some code, from the help of this post that calculates monthly averages per year for a region of interest and exports it to a csv. var UK_SST = ee.ImageCollection('NOAA/CDR/SST_WHOI/V2').select(...
1
vote
0answers
17 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
59 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
vote
0answers
40 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
vote
0answers
91 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/...
1
vote
0answers
34 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
66 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
vote
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
vote
0answers
56 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
vote
0answers
160 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 ...