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.
1
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1answer
273 views
Openlayers Vector Feature Popup
im trying to create a popup in Openlayers that would open when someone clicks a marker. And the marker is setup like this: new OpenLayers.Feature.Vector() and not with the ordinary marker layer.
The ...
1
vote
1answer
151 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 ...
1
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0answers
129 views
How to add dynamic index layer for data driven pages
I am trying to create a dynamic map book based on user defined geometry. I can use Grid Index and calculate adjacent tool to create the grids in my Python script. How can I set this newly created grid ...
1
vote
3answers
832 views
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 clipped layer includes the layer before it and only expands on ...
0
votes
1answer
122 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
98 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
147 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
749 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 ...
5
votes
3answers
127 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. ...
0
votes
0answers
61 views
How to apply an existing symbol in pyQGIS?
I'd like to change the layer rendering style from python code.
Basically I want to do the same operations I can do from QGis by:
Right-click on a layer
Select Properties
Select one of the displayed ...
1
vote
1answer
75 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
169 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 ...
0
votes
0answers
103 views
how to show LINESTRING intersection with other layers in Openlayers?
I'm using Postgis/Geoserver/Openlayers and I have a query that gets al the "towns" that are near a "road". Now, "road" and "towns" are different layers, and I want to show them in Openlayers.
But I ...
2
votes
1answer
518 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
95 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
134 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 ...
5
votes
1answer
269 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
79 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
70 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
45 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 ...
4
votes
1answer
579 views
Leaflet: How to move the layer-control menu?
This might be a silly question, but I could not find a documented way to achieve this.
I'd like to freely position the layer-control menu, probably to the top left near the default zoom-in/out ...
2
votes
1answer
394 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
95 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
1answer
140 views
Openlayers - Get Type of Layer
Is there a way to get the type of all the layers in an OpenLayer maps object? What I am trying to do is iterate over all the layers in my OpenLayers map object and populate a dropdown list with the ...
2
votes
0answers
108 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 ...
2
votes
1answer
85 views
Is there easy way to get layers names from WMS server?
I've been looking for information on how to get layers names from certain WMS servers, but I didn't find any.
E.g. I have this server: http://sdi.geoportal.gov.pl/wms_prg/wmservice.aspx and I want to ...
1
vote
1answer
205 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 ...
2
votes
1answer
189 views
How to record a base layer change event in OpenLayers?
The OpenLayers.Control class possesses an eventListener property which could be used in the layer switcher control. I am not sure how to make use of it to detect a base layer change event so that I ...
1
vote
1answer
379 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 ...
6
votes
4answers
1k views
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 ...
2
votes
0answers
150 views
calculate total Miles in a polygon using Google Map
I have an application that allows the users to create any custom polygon layer on top of google maps, i am interested to know if their is a way to select the road layer in this polygon and then ...
0
votes
0answers
145 views
how to turn on a group layer when a sublayer is turned on in Flex Viewer
I have a map server with layer structure like this:
-A (GroupLayer)
--AA (SubGroup)
--AAA (Feature Layer)
When I set AAA.visible=true, I need at least AA get turned on too.
I got my code like ...
3
votes
1answer
294 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
776 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
81 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 ...
2
votes
2answers
526 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 ...
0
votes
0answers
94 views
Where can one find GIS shapefiles for all of California's municipal jurisdictions (cities, counties, special districts, JPA, CFDs, etc.)?Edit
Cities and counties are easy but I've been digging a while for the other information and haven't had any luck. Particularly interested in water districts and some of the more major JPAs -- for ...
2
votes
1answer
963 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
votes
1answer
264 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 ...
1
vote
1answer
152 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
121 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 ...
0
votes
2answers
110 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.
2
votes
1answer
201 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 ...
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 ...
1
vote
2answers
398 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
90 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
64 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
143 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
310 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
283 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 ...
