A representation of a real-world objects on a map.

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1
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1answer
118 views

Dividing map into features (whole squares)

I'm using QGIS 1.8.0. I divided a map of a state with its municipalities into many features using a GRID (small squares), but instead of creating one ID per feature (one ID per square), it creates one ...
0
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0answers
51 views

Borderlines of states subdividing my GRID

![enter image description here][2]I just merged a map of a country with its states, so I went from having 1 feature (the whole country) to 32 features. Is there any way to have the borders of the ...
0
votes
1answer
75 views

How to know the real size of grid? [duplicate]

Im working with QGIS. When dividing a map with a grid I set in the paramters X=0.1 and Y=0.1. Could someone please explain what does that mean? I mean would the map be divided into 100mx100m squares? ...
4
votes
1answer
56 views

Dividing map into features with invisible divisor lines using QGIS?

I'm working with QGIS 1.8.0. Is there a way to divide a map with a grid but make the divisor lines invisible? I have a shapefile as the one in the left and I want it to see as the one in the right but ...
3
votes
2answers
27 views

Ways to deal with thousands of features of vector layer in OpenLayers

I am building a webgis portal too show a big number of polylines (road network) and points (villages, cities etc.). All my data are stored in a POSTGIS and throuh geoserver and Openlayers I display ...
0
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0answers
15 views

Can you re number representations in arcmap?

I created a representation and added loaded rule or import symbols but had to delete some. Now the numbers in front of the name of the rule is out of order ( [2],[3],[5],[7]). I know you can change ...
0
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0answers
21 views

Render order of vector features in OpenLayers 3

In a web map application I have a vector layer from a GeoJSON source of country borders. The layer loads perfectly and interactions such as ol.interaction.select works fine as well. I want to style ...
2
votes
2answers
85 views

IdentifyFeature() use via PyQGIS?

Intent is to have two variables (QgsVectorLayer and feature.id() within said layer) as input for the Identify feature map tool in Qgis (2.6). Wondering if a feature can be selected programmatically ...
0
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2answers
330 views

Cannot register a Feature dataset

I am having an issue trying to register a dataset, and being able to edit a featureclass within it. I am new to SDE so please bear with my explanation. I read online you cannot register a feature ...
2
votes
1answer
1k views

How to deactivate Vector Selection In OpenLayers wms features

This is my sample code and work fine :), But I have a little problem, I'm using multiple layers (WMS), when I zoom the layer will be shown or hidden. In my example bellow when OpenLayers level zoom ...
2
votes
3answers
392 views

Server side clustering - cluster (feature) geometry

I am trying to implement server side clustering and show it using OpenLayers. I am using this good material as an example. As a clustering result, a get some list of features, some of them are ...
0
votes
1answer
73 views

JSON coordinates not showing on Open Layers 3

i hope you guys could help me. its been several days since it tried and failed on populating my markers using a json Method. Please point out where im making a mistake. Thanks. Below is my code: ...
0
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0answers
21 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 ...
8
votes
4answers
5k views

Get all the points of a polyline

I have some polyline feature objects in python. Now I want to get all the points of polylines. For example, if a polyline has start point [0,0] end point [5,5]. Result: ...
0
votes
2answers
236 views

javascript function to search all OpenLayers vector features covering a pixel

I have an OpenLayers map that draws features in a vector layer. The features are selectable and have a popup on select. Unfortunately in a lot of cases the features overlap so it can be impossible to ...
0
votes
0answers
9 views

Regarding metadata and features

I have to work on geographical metadata and features for which I need to store them in a database.I tried to search for the metadata and features from various places like INSPIRE but am unable to find ...
0
votes
1answer
1k views

OpenLayers create marker (feature with icon) from WKT

I have a point object WKT. Like this: POINT (25.04568 48.221548). Also I have an icon in my project folder. My goal is to show on a map an icon that represents a feature. Can it be just a normal ...
0
votes
1answer
1k views

Having trouble selecting polygon from existing layer (using OpenLayers.Control.SelectFeature)

I am hoping someone can point me in the right direction. I am not a programmer, so that is my first roadblock. ha The problem: I have an existing polygon layer and I am trying to select one of the ...
2
votes
2answers
57 views

Shapes not matching number of records

I am trying to merge features (polygons) from 7 subregions in ArcGIS (v10.x). Merge goes fine but when I do any other process on it (e.g. Adding a field, calculations etc), the merged file is ...
0
votes
1answer
38 views

Make city labels inside of its country

I have City points and a Country polygons. Is it possible to make it so that labels of the cities are inside of their own country without converting to annotation? I'm using ArcGIS 10.1 for Desktop.
2
votes
2answers
1k views

How do I modify features during runtime, in a GeoJSON feature group on Leaflet?

I have added some GeoJSON to my Leaflet powered map as below. (Altered version) var array_of_layers = L.layerGroup([]); var styleholder = []; var belgium_style = {color: "#d3e46f"}; var bosnia_style ...
1
vote
1answer
32 views

How to label a road with my symbol multiple times?

I am trying to label a road that I create with Select Features, with a symbol multiple times along the road. Is it possible to recreate my symbol multiple times along the road to label it?
4
votes
1answer
1k views

How to integrate OpenLayers and ArcGIS Server?

I am using the OpenLayers JavaScript API within a web application. I am displaying non-base layers hosted on an ArcGIS server. When I load the ArcGIS layers, I load them using ...
6
votes
1answer
2k views

How to Verify if a FeatureLayer already exists?

I am currently working on a project where when user loads up their map (mxd) into our system, we create several custom featuerlayers for them. My problem is though, I have no idea how to check if I ...
0
votes
1answer
70 views

How to submit data to modify feature using applyEdits of ArcGIS API for JavaScript?

I'm new to ArcGIS API. In a form, how can you submit data to modify a feature using applyEdits? No map is involved with this. I have a form that populates the editable data with javascript. When the ...
4
votes
3answers
404 views

How to find out what features /tags are included in an .osm or .pbf file?

I would like to load osm data into a postgis (postgresql) database. In How to load OSM data into PostGIS preserving all Tags? there has been a solution posted: Download the OSM files (in .osm ...
2
votes
1answer
793 views

How to drag a feature in Open Layers 3

I'm trying to replicate something that was fairly easy in Open Layers 2 in Open Layers 3, which is: dragging an existing feature to a new location on the map. In Open Layers 2 I just added a ...
2
votes
2answers
70 views

“Phantom” features showing up in QGIS 2.4

I tried searching for this, but am unsure exactly what my problem is. I am using QGIS 2.4 on Windows 8.1. I have a project in which I have been digitizing from OpenMaps. Last night I was doing some ...
1
vote
3answers
42 views

How to narrow raster features to single cell width?

Are there any tools or existing workflow which convert raster features (such as roads, rivers, electric lines etc.) which are (or can be) multiple cells wide to a single cell widht (i.e, center line). ...
1
vote
2answers
206 views

In OpenLayers 3, how do I draw an extent as a LinearRect?

In OpenLayers 2, this was an easy feat. I was able to simply instantiate a LinearRect given the coordinates of my BoundingBox, and then add the LinearRect as a feature to a vector layer I had added to ...
1
vote
1answer
46 views

Feature extraction in remote sensing!

Which are the most common features in order to perform a supervised classification in remote sensing? Furthermore anyone worked with SAR features? Which are the most commonly used? Can anybody suggest ...
0
votes
1answer
281 views

Get layer name by click on features OpenLayers3

I want to add selec interactions to my OL3 map. Adding two different select interactions like this is not working. Only the second one works. Like this: var select = new ...
3
votes
2answers
212 views

Why use feature extraction?

Why is feature extraction important? Why do we have to reduce the feature space? Is it only a computational problem when we use hyperspectral imagery or does this procedure improve the ...
6
votes
2answers
2k views

OpenLayers Selectfeature get mouse position

I'm have been searching for several hours and do not find a way to get mouse coordinates after a SelectFeature, which returns the feature by itself. I saw that this has been asked several times ...
6
votes
2answers
155 views

what's the difference between spectral signature and features in remote sensing?

I would like to understand if is there any difference or relation between spectral signature concept and features in remote sensing?
0
votes
2answers
73 views

OpenLayers: programmatically fire ModifyFeature event

Does anyone know how to programmatically simulate a vector feature click that puts this feature from normal mode: to modifyfeature mode: I only have one feature inside the vectors layers and i ...
0
votes
2answers
47 views

How to make openlayers features externalGraphic reappear after hiding

I'm displaying a vector layer with pois, generated from a text file: lat lon icon iconSize iconOffset title description 56.030325 14.4774116666667 ...
1
vote
1answer
51 views

How do I get layer feature type in OpenLayer?

I am new in openlayer and I wanted to add a modify feature function in my application, for this I need to know the feature type of the layer (i.e Point, Polygon or line). Because as per the feature ...
2
votes
0answers
52 views

Geotools wfs getFeature

I want to retrieve the feature Collection from a wfs server with the java library GeoTools. I tried this code, but unfortunately the program fails to execute. public class App { public static void ...
1
vote
1answer
30 views

Access vector layers features

I have an openlayers vector layer with features added from a text file. I am now trying to access these features via their attributes (if layer.features.attributes.some_attribute equals to something ...
6
votes
1answer
410 views

Display Feedback “Stutters” When Moving Features

I have a custom tool for moving features that implements IDisplayFeedback and geometry-specific CoClasses to show the user where they are moving the feature. IMovePolygonFeedback polygonFeedback; ...
2
votes
2answers
71 views

How can I select features based on another feature attributes?

Here is my case: I have a layer of features (buildings from a city) that is populated with polygons. This polygons have attributes : street name and postal code In the project I have another layer of ...
1
vote
3answers
549 views

How to select features of visible layers in QGIS

In QGIS 1.8 I used plugin "Select features of visible layers by rectangle" to know the layer that owns a visible feature. In QGIS 2.0.1 this plugin is no more available. I wonder if it is possible to ...
3
votes
2answers
46 views

Generic Grid to Coordinate System

I have been given a large dataset of X,Y positions of animal movements in a generic grid system. It uses 0,0 as an origin and then position units are in feet from origin. I have the geo-referenced ...
2
votes
2answers
123 views

Modifying a WMS feature in POSTGIS with Openlayers

I have a WMS layer that i'm using to display complex features to the users. It was really the main reason i chose GeoServer, because rendering all the vectors, made it painfully slow. Like GeoServer ...
7
votes
3answers
5k views

How to export multiple featureclasses to shapefiles?

I have plenty features in a geodatabase. I need to save/export them into shapefiles, because my mate works with Manifold, which is not able to read geodatabases. Any Ideas? Click on every single layer ...
5
votes
5answers
8k views

Cutting features to do opposite of clipping in ArcGIS Desktop?

What´s the easiest/smartest way of getting the opposite output of the clipping tool? I just need the area of feature A1 which is not covered by feature A2 in a new Layer/File. Now, I get the result ...
2
votes
0answers
102 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 ...
0
votes
2answers
43 views

feature store get NullReferenceException error

I am trying to update a field value according to the selected OBJECTID. But get System.NullReferenceException error. Don't know what's wrong with the code. My code is as follows: pActiveView ...
3
votes
2answers
50 views

Breaking connecting between features (Editor tool)

I snapped a series of lines to a point (The ? symbol on the picture). Now, I am trying to unsnap them so I can connect them to their respective line I just created. My question is simple. How do I ...