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

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0
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1answer
57 views

Openlayers cluster stragegy total count

How can I get total feature count of vector layer: var mylayer = new OpenLayers.Layer.Vector(null, { "protocol": myWFSProtocol, "styleMap": style, "strategies": [ ...
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0answers
18 views

Is it possible to catch mouse events from a hidden feature layer?

I want to avoid drawing a feature layer. I want it to be hidden and load as fast as possible. I have tried with opacity zero but i think it still draws. Is there any way to minimize the time of being ...
0
votes
1answer
157 views

assigning individual sytles to features crated by arrays - Openlayers 3

My ajax request generates multiple arrays that then create polygon features. These features then populate a vector layer and display on my map. How can I assign a different style to each new polygon ...
0
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0answers
34 views

UniqueValueRenderer on GUID fields doesn't work

Have anyone been using ArcGIS UniqueValueRenderer on attribute fields of type GUID? I've created a UniqueValueRenderer that has a default symbol. If I do: renderer.Fields.Add("OBJECTID"); or ...
2
votes
1answer
233 views

Cutting rectangle set (not squares) into triangles using ArcGIS for Desktop?

I have some large features that I need to split into smaller pieces for terrain alignment through vertices in another program. I figured triangles would be the best solution. So basically I want to ...
1
vote
1answer
79 views

Create Multiple Circle

I am trying to make many points in a map as a grid. The code makes what I expect but the time to load is quite long so I suppose that there should be other ways to be more efficient drawing many ...
2
votes
0answers
241 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 ...
1
vote
1answer
93 views

Create Multiple Feature Layer and Add to MXD

I am really stuck with this one and cannot seems to get the code to execute. Every time I do so, I get the error: Input Features: Dataset [u'Test1'.....] does not exist or is not supported. My guess ...
1
vote
1answer
117 views

Not able to close custom edit form in ArcPad 10.2.2 using ok button

Summary of problem: I have problem with ArcPad in that the "ok" button on my custom edit forms is unresponsive when I am trying to add a new feature. Project set-up: I am using ArcMap 9.3.1 and ...
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0answers
190 views

Features disappear when moved in edit session, but only sometimes

About 75% of the time, when I move a feature in an edit session the feature disappears. The feature remains in the attribute table, but when I zoom to it it doesn't exist anywhere. The rest of the ...
0
votes
1answer
105 views

How to set a maximum amount of features to be drawn in every zoom level

I want to apply a form of generalization/specialization to my Open Layers map. Is there a way to set the amount of WFS features to be rendered based on the zoom level? In geoserver you can set the ...
0
votes
1answer
185 views

Delete features from FeatureCollection in GeoJSON?

I have a FeatureCollection in GeoJSON. I want to delete all features that have an ID that doesn't start with "B". { "type": "FeatureCollection", "features": [ { "type": "Feature", ...
1
vote
1answer
77 views

Can I style a feature point based on its id?

I wonder if its possible to style a feature point which belongs to an Open Layers vector layer with points by using its id. For example I have in this layer 3 points with ids: a,b and c. Right now ...
1
vote
0answers
100 views

Get Feature Count

My situation is as below, Database 1 : SDE database.Topo Feature Class : 170 Database 2 : SDE database.AOI Feature Class : 1 I want to get feature count of 170 feature classes base on selected AOI ...
0
votes
1answer
39 views

WFS layer without features

I have a layer with many features and when I add it to a map as WMS layer it works. But if I add the layer as WFS it seems there are no features. The code I use to load WFS layer is: var ...
2
votes
1answer
198 views

How to delete a double feature in QGIS?

I am working with QGis, and I have a layer that has some double features. I want to delete one of them, but not both of them. How can I do that easily?
2
votes
1answer
121 views

Qgis 2.7 (Dev) feature rotation?

Curious if the following code has a blatant error that has been overlooked with respect to rotating a single polygon feature. The *.geometry().rotate(...) returns a '0', indicating it was successful -...
0
votes
1answer
48 views

OpenLayers3/GEOJSON - Feature 'source'?

I'm fresh with OpenLayers/GEOJSON... Anyway,vector layer with features (lines, polygons..dots..) and it pulls those data from GEOJSON ("type":"FeatureCollection") file. Is there a way to see '...
1
vote
1answer
207 views

Multiply whole column with the field calculator in QGIS

I have a layer with the field size. I did some mistake with the value and now I need the values multiplied by 16. But instead of going through 500 lines and recalculating them I would like QGIS to do ...
3
votes
2answers
250 views

Draw Paths Automatically

I have the following data: The pink represents digitized hiking trails done on a different software that is completely inaccurate compared to raster images. They do however have attributes with the ...
0
votes
1answer
159 views

Merge two points of two different polygons to get one polygon at the end

I would like to join points from two different features. I already searched for plugins but so far but didn't find one working plugin or solution for my task. So here is a picture of 2 polygons/...
1
vote
0answers
106 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 ...
1
vote
0answers
51 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 ...
3
votes
3answers
631 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 ...
2
votes
1answer
536 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 ...
3
votes
2answers
568 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
votes
0answers
346 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 ...
1
vote
1answer
834 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: ...
2
votes
1answer
425 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
62 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.
1
vote
1answer
59 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?
2
votes
2answers
208 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
202 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). ...
4
votes
2answers
405 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 ...
2
votes
2answers
138 views

Feature extraction in remote sensing! [closed]

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
2answers
110 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 http://www.medinsbiologi.se/hano/Foto....
7
votes
2answers
2k 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?
1
vote
1answer
87 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 ...
2
votes
2answers
667 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 ...
0
votes
2answers
482 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 ...
1
vote
1answer
3k 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 ol.interaction....
2
votes
0answers
307 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(...
3
votes
2answers
118 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 ...
0
votes
2answers
135 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
88 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 ...
1
vote
2answers
533 views

Openlayers 3 detect the layer by mouse move

I wanna do something like this ; Openlayers 3 Vector Layer Example But I don't want to one layer, 3 or more layer on the map and get feature like the example. How can I seperate the layer ...
1
vote
0answers
27 views

Creating single feature to represent group of individual features, based on location and #, using ArcGIS Desktop?

I am looking for an algorithmic way of handling this situation, as I can do it manually with the ruler and some time, but it would be nice to find a programmatic to have Arc do the work for me, so any ...
1
vote
0answers
338 views

Using Detect Feature Changes Tool in ArcGIS for Desktop?

Has anyone used the Detect Feature Changes (Data Management) tool in ArcGIS 10.2 for Desktop? I am working on two linear feature classes, one a newly updated and one an old one. This is the first ...
0
votes
1answer
109 views

arcobjects determine when attribute dialog window closed

In arcmap, I choose to "Display the attributes dialog before storing new features" in editor options for several layers. I intend to do further development upon user closing the attribute dialog ...
1
vote
0answers
78 views

Creating custom polygon symbol using ArcGIS Desktop?

How can I create a custom polygon symbol? I already played with layering the symbol levels to no avail. I think that I need something a little more advanced than that. I'd Like to get something that ...