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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17 views

Adding an OpenLayers 3 layer parameter to change external layer controls

I have this JSFiddle that has a couple of layers and then a box after it where my opacity slider would be if all the correct external resources were loaded in. In the 'Cities layer 2' layer ...
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11 views

Updating basemap and layers at same time using ArcGIS Runtime SDK for .NET?

i'm working with ArcGIS Runtime SDK for .NET 10.2.5, my app has different graphiclayers with objects that are continuously moving around the map (new position data is provided fastly), the problem ...
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5 views

Heron template deactivates overlays

I'm using the template of Google layers with an overlay of World Cities(OpenGeo), whenever I try to add some more overlays the application results in an error. It loads all the overlays but whenever I ...
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0answers
14 views

Toggle layers on print composition

I want to use QGIS to make several views of bold colors for one same map. I've been using the layers in order to keep one on top of another. How could i make a composition on the print composition ...
4
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1answer
71 views

Automatically create new layers from a single dataset using definiton query for unique values in a field

I would like to automatically display a featureclass as different layers based on a specific field. I've seen a few tools online and on XToolsPro under the category of Split by Attributes, but they ...
2
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1answer
20 views

Merge and export two layers that utilize blending modes

I have a new question that I'm trying to solve. Spent more time than I can to admit trying to come up with a solution that doesn't require bringing the layers into Photoshop or the GIMP (which would ...
2
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1answer
225 views

Advice needed on JavaFX Map Rendering

A few months ago I inherited an old (10+ years) Java Desktop application that used maps and simple icons to represent point data to various users. The application was writted in Swing and used Esri ...
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16 views

Compare similar lines and update layers

Here there are two layers with the representation of the streets and the idea is: We want to update the most recent layer (with the red line) with some of the data storaged in the other one (the light ...
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1answer
202 views

How to refer to another layer in the field calculator?

Is there a way to select an attribute from a polygon layer and insert the value into a virtual field of a point layer using "within" in the field calculator? CASE WHEN within($geometry, ...
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1answer
31 views

How to get programmatically selected layers from the QGIS legend?

My QGIS plugin exports all layers from QGIS to KML format. Now I'd like to export only selected layers. However, I can't find any hints in QGIS API. Is it possible to iterate over selected layers in ...
2
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1answer
29 views

Apply Symbology from a Layer

I am trying to update the symbology of a layer with another layer with a python script. I have written a code for this. But I am getting the following error message : ERROR 000732: Input Layer: ...
2
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1answer
20 views

Layer selection visibility unchecked in initial state in OpenLayers 3

I have this JSFiddle example that has two vector layers in it, 'Cities Layer 1' and 'Cities Layer 2'. As you can see from this example, cities layer 1 has a visibility set as the default of true and ...
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1answer
390 views

Get feature from two overlapping KML layers doesn't work

I did an implementation similar to http://openlayers.org/dev/examples/sundials.html The difference is that I have two or more kml layers at the same location and want to show their information ...
2
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1answer
232 views

How to load a *.qgs file in a C++ QGIS standalone app?

I'm using QGIS-2.4.0 API to develop a standalone app by C++. I saved a test.qgs file in QGIS Desktop software, in the project, there was one layer and it was visible. Then I loaded the test.qgs ...
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1answer
30 views

Geoprocessing breaks my data links after upgrade?

I've had this problem all day, and it's happened before, too. I am running desktop 10.3.1 and want to produce a very simple buffer from a single parcel. The output is assigned to the same .gdb that ...
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21 views

Filter geoJSON layer after it has been loaded

I'm declaring and defining a geoJSON layer first, like: var layer1 = L.geoJson(null, { onEachFeature: function(feature, layer) { ... } }); ..and then loading a CSV into it, like: ...
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46 views

QGIS python originalName() does not return actual original layer name

I am writing a Python QGIS Plugin, using QGIS version 2.6 as the basis for development. When loading data into the canvas programmatically, I am trying to maintain the spatialite table name as the ...
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1answer
1k views

Draw order (zIndex) of OpenLayers polygons and points in the same layer

My question is similar but slightly different from this one: http://stackoverflow.com/questions/5003349/openlayers-vector-features-z-indexing I have an OpenLayers Vector layer which contains polygons ...
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37 views

What is corrupting my layer file?

I'm trying to save layer files from a colleague's mxd. As usual I right clicked on the layer and saved as layer file. Simple - but no - the layer files can't be opened. I get this message "Adding ...
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26 views

How does ArcGIS Pro choose default color for first layer added to Map?

When I add my first vector dataset to the Map in an ArcGIS Pro project that I created using Map.aptx, it always comes in using a gaudy brown color like in the graphic below. Doing the "equivalent" ...
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1answer
27 views

.net arcobjects retrieve user value from layer data source

I have a need to get the user value from a layer properties. The value is from: Layer Properties -> Source -> user in Data Source (sorry not enough score to attach the picture). I tried to check ...
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1answer
32 views

How do i match Layers in QGIS

am trying to create a map, which shall show NRW ( a part of Germany) with some extra gimmiks. Those Gimmiks are Coordinate based locations of several Manufacturers. Later on i want to adjust the ...
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1answer
30 views

Single WMS from single mapfile with several rasters in MapServer

I have several rasters in a single mapfile, I put them as layers like here: LAYER NAME "Layer 1" GROUP "All Layers" TYPE RASTER STATUS ON ...
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2answers
385 views

How do I reach a layer inside a GroupLayer?

I am having problems in ArcObjects. I am struggling to get to the individual (feature-)layers inside a GroupLayer. Does anyone know how to do that ?
2
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2answers
64 views

definition query with 3 plus variables to loop with python and save layer files

I have a script that takes an input feature class and uses a field within this class to create a definition query for each unique field. A question on how to do this is listed below saving layers for ...
2
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1answer
26 views

Postgis spatial query st_disjoint

I have 2 layers that I want to compare. I wish to retrieve the features in the layer 1 that have no part in common with the features in the layer 2. I try queries like that but do not returns me the ...
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21 views

Finding how many points are in polygon of layer in specific time using QGIS?

I have the layer that I created with the number of earthquakes in each region in the last 400 years. I want to know the number of earthquakes that occurred in one specific region prior to 1900. How ...
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1answer
25 views

Render or display only the boundary of a vector layer containing thousands of polygons

This might be a very basic question but my lack of experience makes it really hard to answer. To have a cleaner map to print I want to display only the boundary of a layer composed of more than ...
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24 views

C++ QGIS Conditional Label Colouring

I am using QGIS and C++. When I create a layer of polygons with labels in the center I am able to use a RuleBasedRenderer to control the background colour of the polygon. How do I similarly control ...
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2answers
35 views

How to convert KML file to layer , on an alrady existing map in arcgis

I have a map in arcGIS, and i want some kml data to be shown over that map. But if i convert kml to layer, the data is not visible on that map. Both the layers can be seen separately by "zoom to ...
2
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1answer
62 views

“No data available” on hover

I have the following map: https://aressk.cartodb.com/viz/408dd3ea-deea-11e4-9d17-0e9d821ea90d/embed_map It has two layers. On the Waypoints layer, I have Hover turned on for the Info Window. On the ...
2
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1answer
36 views

QGIS TimeManager with multiple features at one time?

Since the data I have to deal with is really large, it is not practical to separate every feature into one line in the CSV file. Is there any way to animate them as a whole layer? I have ...
0
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1answer
39 views

Copying the visual shapes from another layer to the current one, while keeping the current layers' database

There are 2 layers that have similar shapes but small differences. I want to keep the shape of layer 1 while having the data of layer 2, which includes more data and it will be animated using ...
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1answer
20 views

Pass coordinates parameters to geoserver pgrouting service from Leaflet wms tile layer

I've configurated a pgRouting service in Geoserver, following the steps on the documentation it's easy to accomplish. Reading the documentation, existing examples, etc.. I've come to undestand how ...
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1answer
178 views

Where to upload layers in geoexplorer?

I just install opengeo suite (boundless) in my machine and try to explore it. I followed the instruction in user manual and I encountered a problem. In "Load your data with GeoExplorer" part, after ...
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1answer
35 views

set the transparency layer group with Python

How can I set the transparency for all layers within a group of layers? I assume this will require the use of a FOR loop in the Python Console. Based on How to set the transparency for multiple ...
1
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1answer
279 views

Geoserver api: how to determine a layers respective workspace?

I am using the geoserver api to find information about layers that are available. I am using: http://localhost/geoserver/rest/layers.json to get a dynamic list of all layers. If I then select a ...
3
votes
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) ...
5
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1answer
1k views

Layer loadstart & loadend events in OpenLayers 3

OpenLayers 2 has these layer events "loadstart & loadend." What is equivalent to them in OpenLayers 3? While a vector layer loads and is rendered, I need to show a loading icon.
1
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1answer
163 views

Why does Describe function fail on annotation layer with RuntimeError: Object: Describe input value is not valid type?

I am accessing layers in an mxd programatically and also accessing the layer properties using the Describe function lyr =arcpy.mapping.ListLayers(mxd) # gets me the list of layers in mxd desc= ...
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0answers
24 views

QGIS - Pop-up menu not displayed when right click on a layer in layer tree view

I'm developing a custom QGIS application using the QGIS API. I've been using the API provided with QGIS Brighton (Version 2.6.1) and have been developing the application in Python in a Windows 7 ...
2
votes
1answer
34 views

PyQGIS: How to get the list of valid layers in TOC?

To get the list of TOC layer names I used the approach suggested here: for layer in QgsMapLayerRegistry.instance().mapLayers().values(): print layer.name() But this method is not reliable due ...
2
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1answer
34 views

How to display map tips only for one layer?

I'm relatively new to QGIS. I added the hover labels to my map using the Map Tips. My issue is that it makes hover labels for EVERY layer on my map. I only want it to make labels for one layer. Is ...
2
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0answers
26 views

How to make a model with more than 2 input layers for buffering and merging?

Would it be possible to add more inputs to Buffer and Merge? From what I can see there is a limit of two input layers per both. As far as I know this is possible in ArcGIS's Model Builder but from the ...
2
votes
1answer
2k views

Layer visibility using maxscale minscale not working

I'm using Openlayer and Geoserver. I have a series of layers that have a scale parameter like: 1:50000-1:25000 where 50000 is the max scale while 25000 is the minscale. I have a map like in this ...
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1answer
24 views

Adding point layer in QGIS from SQL Server failing

I just downloaded QGIS a few days ago (version 2.8.2-Wien) but I am not able to get it to work as I thought it would. I tried pulling in spatial data from sql server (a "geometry" column containing ...
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1answer
1k views

Marker layer not responding to events in OpenLayers

I have multiple layers in OpenLayers: three vector layers, one google map layer, and a marker layer. I registered feature selected event to all three vector layers (which works fine, but btw is that a ...
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26 views

GDAL Create Layer WFS

So I'm trying to write a program that has the ability to read and write data from a WFS (Web Feature Service) I've managed to pull all the data I want from the WFS. Now I'm trying to write to it and ...
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2answers
181 views

How to request group of layers from Geoserver with turn off/on capabilities? Geoserver layer organizer

I would like to organize my layers by topics, and for each of them (if chosen on the client-side), I would like to request a single-tile image, which contains the predefined layers in the correct ...
0
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1answer
31 views

ArcObjects WPF Select layer in legend

Can I select a layer, by code, in the TOC/legend of a map in a WPF ArcGIS Runtime application? I develope in ArcGIS Runtime SDK 10.2.2 for .Net in C#.