A layer is a collection of information. It contains specific elements of a gis in a specific presentation method (e.g raster or vector layer). Layers can be edited separately in order to create individual toppics for a map.

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Use python to add layers to TOC

I've been battling with adding layers to the TOC for some time now. I have managed to single layers added but need to loop through a folder and add all layers. Shapefiles I cannot get to add at all. ...
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2answers
2k views

How to make the Overlays section in an OpenLayers LayerSwitcher exclusive?

At the simplest level I need to figure out how to create a customized OpenLayers LayerSwitcher Overlays section which is not using Checkboxes, but uses RadioButtons instead. For my application its ...
5
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2answers
2k views

Create multiple vector layers by reading a GeoJSON file once in OpenLayers

I am a begginner to OpenLayers, and my question is about making things more efficient. My work is about displaying time-dependent weather elements on several point locations on the map. All these ...
2
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1answer
2k views

How to change an OpenLayers vector layer from automatic to manual get request?

I have a web server that returns a FeatureCollection in JSON. I was getting this using the code below, which works perfectly: var vectorLayer = new OpenLayers.Layer.Vector('geoJSON', { ...
0
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1answer
3k views

How to Obtain the feature attributes from feature collection

I am able to obtain the features of the layer which is selected by the user in the Layers table and then intersected by a user defined polygon, using e.features. I was able to obtain the attribute ...
2
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1answer
692 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
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1answer
200 views

Problems with matching layers with different projections

I have two layers with the following projections: Monte Mario IT1 UTM* Anyhow, I followed the instructions (open the project, set the projection, select on the fly projection, load the layers but no ...
2
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1answer
423 views

Make Feature Layer tool problems in Model Builder

I am having a slight problem with using the Make Feature Layer tool in model builder. Basically I have a file geodatabase of points. I am trying to make a model to pull out points according to a ...
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7answers
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How to georeference a vector layer with control points?

I have a non-georeferenced vector layer that I need to be georeferenced. With raster layers the task is easy and straightforward, but I have no idea what should I do with my vector layer. I have a few ...
5
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3answers
9k 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 ...
0
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1answer
130 views

Difference between a *.lyr and layer directly added from *.gdb/sde to mxd?

What is the difference between a *.lyr and a layer directly added from *.gdb/sde to mxd? Doing it difference in mxd? Which is better?
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0answers
220 views

Hack to change data source of a layer file in ArcGIS 9.3.1 with python?

I'm looking for a way to change the source of my layer file using python. Actually I want to do this because I need to re-use a XSL template which is defined under the tap HTML popup of the layer ...
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2answers
833 views

How to overlay points from MySQL served by Geoserver on an Openlayers map?

This might be a very basic question as I am new to GeoServer. What I am trying to do: I have a MySQL table that stores data attached to a spatial point and have latitude and longitude columns to ...
2
votes
1answer
1k views

Problem with layer order in OpenLayers and Google styled maps

I'm using OpenLayers with Google styled maps. My biggest problem is KML polygon layer which needs to be under roads layer but it isn't (see prtscr). What am I doing wrong? This is my coding: ...
3
votes
1answer
370 views

What open-source web mapping solution I need to use for this situation?

I will try to explain what I need to do. I have about thirty KML polygons. I need to put them on some satellite map. On the top of these layers (KMLs, satellite) there must go layer with roads. I ...
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1answer
1k views

How to overlay roads layer on top of all layers in OpenLayers?

I want to put roads layer (from any source, please recommend some..) on top of my KML polygons and base layer: baseLayer = new OpenLayers.Layer.WMS("OpenLayers WMS", ...
4
votes
4answers
466 views

Why does the layer list context menu not open anymore?

I cannot access layers properties (i.e. change color, filter by query, anything). The mouse right click doesn't do anything. Is there a way restoring qgis to default? Ubuntu 12.04, QGIS 1.8
3
votes
1answer
624 views

How to hide some parts of an image layer with OpenLayers?

My Problem I'm currently displaying a layer image above a Google Maps base layer. I would like, when the user check/uncheck some checkboxes, that some parts of this image layer disappear, and the ...
3
votes
2answers
3k views

Load layers only when zoom level is reached

I'm trying to load different layers based on the user zoom level with OpenLayers. I've seen some similar questions in here, but they load the layer and then hide/show it based on the zoom level. I ...
2
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0answers
182 views

The layer added did not move in ArcGIS 10

I have a favor to ask. I already done the step that Mr PolyGeo and Aaron gave me from my previous question and it really look great when the layer did match all together. Thank you for that advise. ...
5
votes
1answer
1k views

Export each layer in map to a separate image

I have a mxd file with multiple layers I have to export to PNG/JPG. I would like to create a script which turns on layers one at the time before they are exported. So far I have come up with the ...
1
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1answer
159 views

Symbology for specific values

I want to apply a symbology scheme for the final layer of my model. Rules are - All negative - Symbol A 0 - Symbol B All positive symbol C unknown - symbol D I am not sure how I can define these ...
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1answer
585 views

Why my 'add basemap' data seems taking too long to upload the maps in ArcGIS? [closed]

Can i know the easiest way or any other way to upload Big maps hybrid from add basemap in ARcGIS 10? because it seems taking quite a long time to upload the map like around more than 1 hour and still ...
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vote
1answer
77 views

Layer use too big for the coordinate in GE

I've got a problem here. I already changed the format from Tab file into Shp file using MapInfo suggested by friends here. My question is, after we set all the layer into the right coordinates, even ...
2
votes
1answer
138 views

How to add Checkboxes in Geoserver

I have a POI table with some data of categories like Airport,ATM,Bank etc. I want to show these categories as checkbox so that if I click in the ATM Checkbox, only the ATM Points will be display. Is ...
0
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1answer
1k views

Select by Location tool

I am using the Select by Location tool to select certain polygons on my shape-file layer. I start by having a given point as my Selecting Feature and that its relationship is completely_ contains. ...
2
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1answer
90 views

Clipping from a given point

I am working with model-builder and I am trying to clip an area around a certain point. Is there a tool that I can use in which I can assign it a certain distance from the point. For instance, if I ...
3
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1answer
1k views

legend groups and layer position/order qgis 1.8

I'm tring to programmatically create layer sequence also using groups. Simple python code: layer = QgsVectorLayer("004cp000.shp", "004cp000", "ogr") QgsMapLayerRegistry.instance().addMapLayer(layer) ...
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2answers
3k views

How to get names of all layers in a store in GeoServer using OpenLayers

I have strict requirement to retrieve names of all layers in a GeoServer store using OpenLayers. I've gone through the post here, but it doesn't answer my question. I've also gone through GeoServer's ...
5
votes
1answer
2k views

Delete layer from ArcMap using Python

Problem: I'm trying to loop through all my layers looking for layer named "CADAnnotation". If the layer exists then remove the layer from the mxd Notes: Running from Stand-Alone script (ie. NOT ...
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3answers
5k views

Merging Two or More Layers using ArcGIS for Desktop?

I am working with three clipped layers that are shown in the TOC. I created these layers from a large watershed shape-file. However, each clipped layer includes the layer before it and only expands on ...
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0answers
102 views

Remake gxp class

I want to remake gxp.editFeature class. In standart class to edit object need to choose it on map. I want choose abject in list of objects and edit it. So To do this i need make a new gxp.editFeature ...
2
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0answers
55 views

Merging Layers and assigning different values [duplicate]

Possible Duplicate: Merging Two or More Layers I am working with three clipped layers that are shown in the TOC. I created these layers from a large watershed shape-file. However, each ...
3
votes
2answers
62 views

Where to look for oceanographical/environmental data for the Arctic (Baffin Bay/Davis Strait area)

I am looking for oceanographical/environmental variables that are available for Baffin Bay/Davis Strait area over the time period of 1995-2011, however, I am not familiar with ...
2
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3answers
2k views

Change zIndex of Vectors in openlayers

I have a bunch of linestring features on a vector layer. Some of them overlap. If I trigger the hover event on those features, I want them be in front. I did find some functions to set the z-index of ...
0
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0answers
136 views

Leaflet Layers Control - Z-Index? [duplicate]

Possible Duplicate: How to change Leaflet Map panes layering order (z-index)? In the Leaflet Layers Control L.Control.Layers() described here, is there a way to control the z-index (layer ...
2
votes
2answers
107 views

How to bind layer display?

I work on several layers in arcmap 9.3 My question is about creating binds to display theses layers directly. like ctrl+1 ( display / hide layer 1 ) ctrl+2 ( display / hide layer 2 ) ctrl+3 ( ...
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vote
1answer
767 views

Applying layer file not formating labels in ARCGIS 10

I'm applying layer files in ARCGIS 10 using the ApplySymbologyFromLayer_management command via a python script tool. The symbology part works fine but the lables are not formatting. It is my ...
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vote
0answers
359 views

Using Google Maps with OpenLayers for some zoom levels

I've had a search on here to see if this has come up but I've not found anything, sorry if this is a duplicate. I'm trying to use the Google Maps layers with an OpenLayers site, but not for all zoom ...
2
votes
1answer
400 views

How to create new layer within a DXF file?

Using OGR in Python, I'd like to create some geometries within a DXF file, but not in the "0" layer, but in new ones. I tried with: import ogr, os, osr, sys ds = ...
3
votes
1answer
313 views

List Elements or Datasets of a given Layer

I am sorry of this might sound like a noob question but I cannot find any answer from google. I used arcpy to do batch processing of Network Analyst - Make Service Area layer of thousand of stores. ...
1
vote
2answers
134 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 ...
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2answers
166 views

How to edit several layers simultaneously?

I have the land occupation of an area and a layer for each year : 2005-2006-2007-2008...2010. Theses are polygons. There is errors on layers which are common to all of them. For instance: There's a ...
2
votes
1answer
1k views

Add AutoCAD .dwg annotation file to Arcmap using python (Same as +ADD Data button)

I would like to add an AutoCad .dwg file to Arcmap using python the same way that the +ADD Data button does. I can add an Annotation layer with python but only as a feature layer not as an annotation ...
3
votes
1answer
3k views

XYZ Layer in Open Layers has Missing Tiles

In Open Layers I'm having a missing tile problem where it generates a missing link icon and a pink background. I found several threads including this one saying to add this code ...
2
votes
5answers
3k views

Is there any way to extract coordinates of a road segment using QGIS?

I add my own road vector data on top of Google map using open layers plugin with QGIS. The vector layer is generated using PostgreSQL DB. Is there any way to extract coordinates of a road segment ?
4
votes
1answer
1k views

OGR and DXF files: Is it possible to handle layer names? (only “entities”)

I'm using Python and OGR to extract the layers of a DXF file and convert them into SHP. I began with: import ogr, os, sys driver = ogr.GetDriverByName('DXF') datasource = driver.Open('test1.dxf', 0) ...
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2answers
617 views

Its possible to catch ServiceException in Openlayers?

Im trying to catch exception in OpenLayers using vector layers in conjunction with http protocol, its possible to intercept an ServiceException from geoserver ... it will be great to display some ...
2
votes
1answer
855 views

Changing the name of layer using python

I am attempting to change the name of the layer. The following code changes the name of the layer but then removes the layer from the map, and I am not sure why. Note: I don't have any remove layer ...
0
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3answers
162 views

Postgres geometry in a pdf file with php

Is there a way to draw a postgres geometry in a pdf file using a php script? Thank you.