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.

learn more… | top users | synonyms

1
vote
1answer
697 views

How to select features from different WFS layers?

I'm trying to select features from different WFS layers but unfortunatelly it doesn't works in my code. This is my code: var select = new OpenLayers.Layer.Vector("Selection", {styleMap: new ...
0
votes
1answer
496 views

Geoserver does not see new layers

I have an existing GeoServer instance running (version 2.1.3). This GeoServer has multiple Workspaces and Stores serving a number of layers as WFS to an OpenLayers map. I want to update my Stores ...
5
votes
1answer
145 views

How to convert PostGis Table (Grid data) to Continuous field using Qgis?

I'd like to transform my Gridded Layer (generated form a PostGIS table of points) to a continuous and colored layer. How could I do this with Qgis or any other program? Many thanks and best regards, ...
4
votes
1answer
553 views

Extracting donut holes as separate layer in QGIS

Does anyone know how I can extract the holes in a polygon layer as a separate layer in Quantum GIS? An example could be a country with a number of lakes cut out of the polygon - I need the lakes. I ...
2
votes
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 ...
6
votes
3answers
228 views

Automating an ArcGIS Project that is a display of map

I'm relatively new to GIS and looking to automate a project. I have my 'base map' created in ArcGIS, but now need to create several hundred more so looking for an automated method to accomplish this. ...
1
vote
1answer
130 views

OSM labels look as red point in geoserver preview layer. Why?

I've imported shp directory files of OSM to geoserver and the city label layer look like red dots instead of showing labels of street names. Is there a fix for this ? (should I declare this layer kml ...
1
vote
1answer
524 views

Unable to see the featureLayer but it is present on the map

I have created a featureLayer from featureCollection and I am able to add it to the map and when I execute, map.graphicsLayerIds, it also returns the id of the featureLayer, ["resultLayer"]. But I am ...
2
votes
1answer
1k views

Create new polygon layers from postcodes latitude & longitude

First at all, I want to say that I am geocoding enthusiastic but have no formal background on GIS. I'll do my best to use the right wording and make myself clear what I am striving for. Also the only ...
4
votes
2answers
143 views

GIS projection for non-geographic data

I am working on two different types of data. One is related to mapping of Genome structure and another is creating a layout of the inventories inside Internet Data Center. What I am confused about is ...
2
votes
1answer
464 views

What is the easiest way to let a user upload overlayers to openlayers (Geoserver/Mapserver)?

I need to let a user upload vector layers he created with QGIS or MapInfo professional to my website (using OpenLayers as client and either Geoserver or Mapserver as WMS). What will be the easiest ...
8
votes
1answer
2k views

Sort layers in QGIS table of contents?

When I load a bunch of layers into QGIS from PostGIS, they seem to load in reverse alphabetical order. Is there any tools or plugins that allow you to quickly sort the QGIS TOC in a different order? ...
2
votes
0answers
145 views

Ogr: How to add layer description to dgn?

I have created a dgn-file using Ogr, but can't find a way to fill out the description for this layer programatically. (something like _dgnLayer.Description = "Highways") opts.Add("SEED=" + ...
1
vote
0answers
219 views

Layer set visible

I add this layer like this: var POIData = new esri.layers.ArcGISDynamicMapServiceLayer("https://mysite.com/ArcGIS/rest/services/POI_Data/MapServer"); map.addLayer(POIData); ...
1
vote
0answers
68 views

Get layers and apply renderer to layer list from SDE ArcMap

I have the code that gets the layers from SDE, but when i add them to the map they have a different symbology. there is about 80 layers and i am accessing the SDE by getting the workspace from a ...
2
votes
1answer
644 views

How to have a layer with many images that scale?

I know that in OpenLayers you can add Features to a Vector Layer which each have image but then they will not scale (i.e. their size stays the same independent of the current zoom) or at least I do ...
0
votes
3answers
410 views

Accessing fields of particular layer

I am trying to access the fields which I can see in this particular layer. I am able to see that it has fields but fetching the values in those fields is something that I am unable to do. Is there ...
2
votes
0answers
287 views

Getting layers from SDE with vba

Im running arcmap 9.1. i have the code that lists feature classes in a list box from the SDE. The users select from one list box and adds it to another list box. How do i get it to show the layer name ...
1
vote
1answer
1k views

is it possible to obtain layerInfo from the Layer's URL

I am trying to fetch the names of the layers in the MapService, so that I can populate them in the dijit.form.select. I am able to get the layerInfo when the ArcGISDynamicMapServiceLayer is added to ...
1
vote
1answer
2k views

Adding layers using ArcGISDynamicMapServiceLayer

I am right now adding individual layers using FeatureLayer but it takes quite some time to load as the map is for US Counties (3076 count). I tried to load it using ArcGISDynamicMapServiceLayer but I ...
3
votes
1answer
1k views

How to add a layer file to an ArcGIS map document programmatically?

I want to create a feature layer from a layer (.lyr) file and add it to my ArcGIS map document programmatically. I am using C# and ArcGIS. I have a layer file and a shapefile.
3
votes
2answers
2k 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
votes
1answer
100 views

Library design: Layer coodinates/origin

I am working on a vector map library where you can add plain image and vector layers to a map. The map itself consists of an infinite coordinate system and each layer is a coordinate system of it's ...
3
votes
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 ...
2
votes
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', { ...
2
votes
1answer
578 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
1answer
189 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
votes
1answer
389 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 ...
5
votes
3answers
8k 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 ...
1
vote
2answers
777 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 ...
0
votes
1answer
127 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?
1
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 ...
1
vote
0answers
209 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 ...
3
votes
2answers
465 views

Unable to select Vector Layer

I am using the following example, to select a vector layer feature on click. The example demonstrates Highlighting and selecting the layer. I was able to successfully implement the Highlighting of the ...
3
votes
1answer
576 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 ...
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
352 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 ...
1
vote
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", ...
1
vote
1answer
153 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 ...
2
votes
0answers
177 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. ...
1
vote
1answer
546 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 ...
2
votes
1answer
136 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
votes
1answer
952 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
votes
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 ...
1
vote
0answers
358 views

pdf google maps export

In my php+postgis+geoserver+OL application I have to export a map in a pdf file. This map has two layer: the base is a google map layer and a vector layer as overlay. Is there a way to make a pdf ...
3
votes
1answer
249 views

Repairing disconnected layers with selection sets

Has anyone had any success of repairing disconnected layers that have selection sets that have their data sources broken in ArcGIS? Is there a way to detect this through code and then re-create that ...
2
votes
0answers
54 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 ...
1
vote
0answers
101 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 ...
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 ...
0
votes
0answers
135 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 ...