A representation of a real-world objects on a map.
4
votes
2answers
223 views
How to select features that intersect but don't touch (using ArcObjects)?
So how do I do that? ArcMap's Select By Location selects also all features that touch, but I only need the ones that actually intersect the area.
I currently use ...
4
votes
1answer
62 views
Is it possible show the feature attributes dialog when I add a feature in code?
I want to know if it is possible to make the feature attributes dialog in Qgis show up when I add a feature by code using:
QgsVectorLayer::addFeature( tFeature )
This is available when I add ...
0
votes
0answers
157 views
Openlayers WFS Features returned but not drawed
I've managed to get features return by a WFS filter layer but I can't add them on top a google map layer.
var map, Geographic, Mercator, wfsLayer;
OpenLayers.IMAGE_RELOAD_ATTEMPTS = 3;
...
0
votes
0answers
166 views
Why is “Convert Graphics toe Features” grayed out in a dataframe that has georeferenced layers?
I have brought two graphics, a species range and a heatmap, into a dataframe and georeferenced them using control points. I rectified them and now I want to clip one with the other but I can't get ...
0
votes
1answer
377 views
delete feature from database by selecting feature from vector layer [closed]
I want to delete a feature attribute for example say grid completely from the map that is it has to be deleted from database. I am using OpenLayers 2.12, postgis 2.0 and postgresql 9.0.
Please guide ...
1
vote
1answer
82 views
Are There Any OpenSource GIS Software Programs With an “Interactive” Rotate Feature Option?
![Rotate feature option][1]Sorry if the question is too simple, but are there any open source GIS software programs available with an interactive "Rotate vector feature" option?
Eg : ArcGIS has it ...
4
votes
1answer
65 views
Creating a feature of a part of a state boundary from a shapefile of U.S. States
I have a shapefile of U.S. states. I want to create a feature layer from it so that I can do a Near analysis with it.
Suppose that I am interested in the Georgia boundary, but only the part of ...
1
vote
1answer
150 views
QGIS identify features button issue
Is there anyway to get the Identify Features button in QGIS to automatically select a layer and provide the information without having to highlight it first in the layers TOC? MapInfo and ArcGIS ...
1
vote
0answers
152 views
Tie up LineString to the feature when dragging it in OpenLayers
I have an application in OpenLayers which shows a number of devices (Feature) on a map. The devices are linked between each other by cables (MultiLineString).
...
1
vote
1answer
114 views
I'm trying to zoom to a graphic, but nothing happens
I'm trying to zoom to a graphic retuned from the query;
query.OutSpatialReference = MyMap.SpatialReference;
query.ReturnGeometry = true;
After this query I used ...
5
votes
1answer
125 views
How can I increase performance on inserting features with polygon geometry?
I have a problem when inserting features with polygon feature class in FGDB. This is my code:
... initialising some fields (does not affect performance)
m_featureBuffer.Shape = ...
0
votes
1answer
223 views
lonlat from geometry point gives strange result
I added a vector layer to my main map with the controls like the example from openlayers: http://openlayers.org/dev/examples/draw-feature.html
Now when I want to get the resulting lonlat from the ...
1
vote
1answer
461 views
Dynamically adding features with cluster strategy
I am trying to dynamically add features to a vector layer, and use cluster strategy to group those features accordingly.
I am able to do this for the first set of data that gets loaded on the map.
...
4
votes
3answers
2k views
Change Icon of Single Vector Feature in Layer
Currently I am trying to change the icon of a particular feature of a vector layer that the user is focusing on. I add each feature to the map like so:
var point = new ...
3
votes
0answers
93 views
Feature layer graphics count zero after Initialization
I faced a problem when I added a feature layer onto the map and wanted to do something with the graphics. In the onInitialized() event I found that the graphics count is zero, why is that and is there ...
6
votes
2answers
185 views
Why am I getting duplicate ghost points (features), i.e., one point in the feature class but two points?
When editing some of the attributes in a point feature class in ArcMap 9.3, duplicate labels started showing up. When I click on the point, I discovered that the point has duplicated itself BUT there ...
5
votes
3answers
1k views
Slow IE8 responsiveness with OpenLayers and many features
Background
Adding about 700 sites to an OpenLayers Map. Firefox 11 and Google Chrome display the sites just fine. IE8, which is the organization's standard and will not be upgraded for the ...
0
votes
1answer
183 views
How to select multiple features using advanced search SQL in QGIS
I have a layer of planning units covering a large area (there are over 16000 PU's). Three of the columns in the attribute table hold information about which planning units were included in the ...
0
votes
1answer
85 views
How to edit a group of selected features in QGIS?
I am dealing with a large number of planning units across a very large study area. I am selecting a number of features using the advanced search in the attribute table, and would like to edit them ...
0
votes
0answers
163 views
Deleting Features In ModelBuilder ArcGIS 9.3
In ModelBuilder, I have a work flow (data is stored in a File Geodatabase) that currently concludes with the use of the Append tool. I am looking to delete a features, as the last function of the ...
1
vote
1answer
320 views
Overlaping graphics not visible in featureLayer
I have constructed featureCollection from Json and feature collection has 44 features. I have given this feature collection as input to the Featurelayer which is showing only 32 graphics objects of ...
0
votes
1answer
489 views
OpenLayers ModifyFeature and styling
In OpenLayers, I have a Vector layer with a StyleMap and SelectFeature and ModifyFeature controls, like this:
vector_layer = new OpenLayers.Layer.Vector('My Vector Layer', {extractAttributes: true,
...
0
votes
0answers
64 views
why are split-lines saved in the attribute table? (qgis 1.7.4)
A few months ago I splitted some lines in a shapefile with official roads because they are not accessible anymore. Now I loaded that file again into my project and the splitlines appears. Because I ...
1
vote
1answer
304 views
openlayers trigger hover event
I have a bunch of tracks on screen in a vector layer. I used some hover and select styles in the layer styleMap and these styles are properly triggered by:
var highlightCtrl = new ...
9
votes
1answer
854 views
Dealing with overlapping features in OpenLayers
If users create a polygon feature that completely overlaps another one, like this …
… then there's no way you can select the inner feature, i.e. the one that's overlapped by the other. I'm ...
3
votes
2answers
356 views
Problem with multiple feature selection
In an attempt to retrieve all features (point geometry) that fall in a selected polygon, I get the error this.layer.addFeatures is not a function. My code is as shown below:
function ...
4
votes
1answer
462 views
merge selected features and programming
I have a shape file with UK districts and unitary authorities. In the past, using commuting patterns, I worked out a new geography which is close to travel to work areas.
I now would like to create a ...
1
vote
2answers
88 views
Fetching field values from uncommitted features on Qgis
I'm trying to fetch a feature's field value on Qgis, I use QgsFeature.attributeMap().value(cont int & key).toDouble()
This works fine for committed features but it always returns " 0 " if the ...
2
votes
2answers
2k views
openlayers change marker icon, size and offset after drawn
I'm having much trouble changing my (feature)marker icons 'on the fly'. The problem is that I use much different images and also need to change the offset.
So I iterate over every marker and make a ...
1
vote
1answer
165 views
The relation between the Feature's Geometry and its externalGraphic
I wonder what is the relation between the Geometry.Point one sets for a Feature.Vector and the image provided as externalGraphic for the style, in OpenLayers.
Is the Geometry.Point of a feature for ...
4
votes
1answer
150 views
Retrieve data from FeatureClass
I have :
FeatureClass (Structure)
column (Type)
column (OID)
I am trying to get the (Type) for specific OID.
I tried to use this code but it dose not work.
IFeatureWorkspace featureWorkspace = ...
6
votes
2answers
99 views
What event is fired when a feature is edited?
When the user draws a new feature (line, point, etc.) in ArcMap, there are null attributes.
If the user enters values in these null fields what is the event that is fired?
I want to control the ...
3
votes
1answer
103 views
OID for the last added feature
How can i get the Object ID for the last feature created ?
i use m_editEvents_OnSketchFinished() event to run some code, but i can't get the OID
of the most recent added feature.
6
votes
3answers
1k views
How to delete feature class features faster (ArcPy)
I have written this script that recurses through all feature classes in a given set of feature datasets and deletes all their features. It appears to do the job but it runs pretty slowly. Is there ...
6
votes
1answer
73 views
How to store and serve data and its progress over time in GeoServer?
I recently started working with GeoServer and stored some shape files. I successfully can retrieve the data as JSON. The data I want to maintain in the database changes over time. I do not want to ...
1
vote
0answers
114 views
How to create a dynamic distance calculator for selected line feature classes?
My situation:
I am relatively new to GIS so forgive me if this is a stupid question. I am working on a project at a park that I am interning at where the goal is to create a single feature with ...
0
votes
0answers
426 views
WFS layer from Mapserver into OpenLayers connection error
I have been working for last 15 days to connect setup the WFS service on Mapserver into OpenLayers I tried examples from Mapserver but did not work out .Following is the Map file code snippet
MAP
...
5
votes
2answers
2k 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 ...
2
votes
1answer
3k views
Problems with features, popups and strategy with OpenLayers
I'm trying to create a website for vehicles localization on map, but i have some problem with openlayers.
This is my first time with OL...
What I would do is:
- add and update features (my vehicles) ...
2
votes
1answer
3k views
Assign Icons to specific points dynamically in OpenLayers
I have a json file describing features on a map (routes, points etc)
points include places of interest such as airport, harbor etc.
Is there a way to assign icons to these points?
example: have a ...
1
vote
1answer
375 views
Zoom to country with geoserver and openlayers
I would like to preposition an OpenLayers map on a country.
This is, when my page loads, the map should be positioned on the country with an appropriate zoom level. This should work for a (large) ...
3
votes
1answer
534 views
Change data type in Excel file before creation of feature class
I am trying to import data from Excel spreadsheets where each point coordinate has a 'datetime' timestamp (e.g. "2012-06-01 14:45:32") associated to it. When I check the table properties ArcGIS 10 ...
2
votes
1answer
169 views
Query against FeatureClass for a layer
This is some code that I am using to try to get a working IFeatureLayer from a subset of data from a database table. The fourth line containing "fcWkspc.OpenFeatureQuery" throws and error complaining ...
4
votes
3answers
289 views
Can I prevent features from being created outside an OpenLayers map?
In our app, we allow users to create features on maps. The boundaries of these features will later be converted into real-life latitude/longitude coordinates, but does not make sense if features are ...
7
votes
4answers
2k 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: ...
2
votes
2answers
520 views
Get all polylines from a shape file (containing polylines)
I have a *.shp file which contains only polyline features. How can I iterate over all the point features. Given ESRI Polyline example only uses already defined points to make polylines. But I want to ...
14
votes
5answers
4k views
What's the difference between feature class and feature layer?
This may be very trivial question. To me they seems very similar in concept. What's the difference between feature class and feature layer?
2
votes
0answers
78 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 ...
1
vote
1answer
633 views
Delete SDE feature class features with ArcPy
I'm working on a script that will empty my SDE database of all data. How would I go about deleting features from feature classes using ArcPy?
I have an SDE connection created with a user that should ...
4
votes
1answer
613 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 ...
