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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74 views

Flex Viewer event when layer ends loading

I have a widget that adds a WMS layer to my Flex Viewer app. I use proxy. I would know to want which event is fired when layer really ends loading and shows up on map. I tried many, but they dispatch ...
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1answer
56 views

How to select a feature with the mouse click programmaticaly

I am working in c++/QT 4.8.5 and the api c++ qgis 2.8.2 In my application i had top select layer with the mouse click button to get attribute value and show them in a popup windows I see in the api ...
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1answer
59 views

OpenLayers 3 Layer Visibility Checkbox

This JSfiddle example currently changes the visibility of a layer using two individual buttons. However, i want to change this to just one check-box, the check-box in this case has been styled by ...
2
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1answer
44 views

Dissolving Features from different Layers

I'm trying to dissolve polygon features from different layers by their FID. If two polygons have the same FID the result should be one single polygon. Maybe this drawing will help to make clear what ...
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2answers
61 views

OpenLayers 3 insert layer below other layers

I have this JSFiddle that can turn the OSM data on and off, the only issue being when it adds it back in the layer is added on top of everything else. I know this is a relatively simple fix using the ...
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1answer
52 views

How to convert AutoCAD layers to .shp

I have 0 experience in AutoCAD and need to convert some layers to .shp I can use and store in ArcMap. Would anyone be willing to give a step-by-step procedure on this process?
2
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1answer
135 views

How do I open GRASS layers in QGIS

I'm quite a newbie to QGIS and GRASS.. I have installed QGIS 2.10.1 with GRASS 6.4.3 on my Windows 7 laptop and wish to open GRASS layers in QGIS. If I got it right, you can use the QGIS built-in ...
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1answer
121 views

leaflet - any way to add another layergroup on top of a heatmap layer?

Layering with z-index works when using layergroups - but is there any working way to have another layer with circles or other elements ontop of a layer with a heat-map? The heat-map seems to be ...
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1answer
41 views

Removing Layer on ArcGIS API For JavaScript>

I am adding a markers layer called layer1 like this to map function drawPoints(mapInfo) { layer1 = new esri.layers.GraphicsLayer(); for (var i = 0; i < mapInfo.length; i++) { var ...
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2answers
240 views

Create Editable Layer ArcMap 10.2 Desktop

In ArcMap 10.2 for desktop, I wish to create an editable layer to add a simple shape to. As of right now, I have a basemap layer and my selected basemap. However, since the basemap layer is not ...
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1answer
49 views

How to save a a CartoDB buffer to its own data table/layer

This seems like a dumb question, but I want to create (or add to) test_table2 a buffer feature from test_table1 point layer. INSERT INTO test_table2 (SELECT ST_Buffer(the_geom_webmercator, 1000) ...
2
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1answer
150 views

Shapefile/vector layer not appearing in QGIS

I have a shapefile (calling it 'new.shp' for discussion's sake) that won't show up with other layers. If a fresh file is started and I bring in new.shp, it will appear, but any other layers imported ...
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48 views

About performance of qgis with big layer or a lot of layer

does anyone has a feedback on the performance of a big layer by exemple : I have a layer with 100 features, each feature contains specifics attributes with dynamic data, the data change each second ...
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2answers
75 views

Changing datasource of a .lyr file results in empty layer with empty symbology (ArcObjects VB.NET)

I'm having a hard time adding my grid to the map and changing its symbology with an existing lyr file. I have found a great post by Neil Clemmons that explains this, but it doesn't work for me. I ...
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2answers
54 views

How to add a tool as a layer in table of contents ArcGIS desktop 10.3

I have a custom script tool in my toolbox in arcgis. I want to add it as a layer in table of contents so when the map is shared people can have access to it easily. for example as shown in figure When ...
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1answer
42 views

Assigning OpenLayers Layers to different layer trees 'automatically'

I am developing an OpenLayers 3 web application were I would like to incorporate multiple layer trees. Instead of manually adding each layer to a layer tree I would like to do it using the method ...
4
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2answers
296 views

Make a Qgis layer update from a changed data source

I'm trying to get layers to update automatically when their data source changes. I'm using R to write a shapefile with an attribute, and colouring according to that attribute in QGIS. I want to write ...
2
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0answers
62 views

Different Leaflet fillcolors for different layers

I have a leaflet map set up with two layers and I want them to use different colorization functions to color the choropleth shapes. My shapes are set up in layers like this: var povertyLayer = ...
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1answer
80 views

How to properly draw and label overlapping polygons?

I would like to show overlapping polygons on a single layer. The polygons are coloured based on a property and labelled according to another property. The problem is then twofold: The polygons are ...
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0answers
59 views

Layer coordinates and geometry in ArcGIS API for JavaScript?

Currently I'm working on a system that uses the ArcGIS API for JavaScript with layers and map to display information on borders of specific regions. I don't want to display all information at once ...
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1answer
28 views

CartoDB adjusting the style of the layer toggle function

The layer names are cut off in the toggle layer function. Is it possible to adjsut the font size or the length of the layer function box so text is not cut off?
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2answers
114 views

Add external WFS layer to geoserver using REST API

I am trying to add an external WFS as a datasource to my geoserver via REST API. I already added a new workspace and WFS datasource. Now I want to publish a layer from that WFS on geoserver. The ...
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1answer
43 views

Mapbox Studio Draw Order

I have made a map using Mapbox Studio. The map is made up of 2 map sources, MapBox Streets Custom Style - a PostGIS layer I am having trouble working out how to set the draw order. I have tried ...
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0answers
21 views

Sub catagories in leaflet layercontrol

I am trying to create subcategory in layers which looks like below and trying to display the Banks on basis of their names. I created a new control customLayerSwitcher = L.control({ ...
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33 views

Transparent layers won't display correctly, but print OK in ArcMap?

Transparent layers are not displaying correctly in ArcMap 10.2 or in exported maps, but they do print OK. They look like this: The weird thing is - the transparent layers displayed fine a few ...
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17 views

Layering polygons over neighborhoods?

I would like to layer a polygon with 30% opacity using different colors over OpenStreetMaps or Google Maps like so: How might I go about doing that?
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0answers
79 views

Qgis delimited text layer from an excel file converted to .csv

I'm trying to add a delimited text layer using coordinates. The file has been created in excel and then converted to a csv file in the saving. When I put it into Qgis it doesn't recognise the ...
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0answers
60 views

How to show two layers at the same time in Qgis

I have a question about Qgis layers. I want to see two layers at the same times. one is lines which are boundary lines and the other is polygon which are district. when i was surfing about this ...
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0answers
25 views

How to SetVisible a layer without redraw all the mapcanvas

I am working with QGis 2.8.2 API c++/ QT 4.5 I am displaying a lot of layer in a mapcanvas, I am looking for a method like setVisible(boolean ) in order to setvisible or not a specify layer ...
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0answers
98 views

What could be making QGIS 2.10 crash when loading a project file?

On QGIS 2.10, running on Ubuntu 15.04 Linux, I have a project file that has a fairly large number of mainly shapefile layers, which gets to 99% on the slider to the right of where it has a message ...
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1answer
133 views

Arcpy script to turn off all layers in a MXD

I tried this standalone script to turn off all layers in the MXD: print "This script turns off the following layers:" try: arcpy except NameError: import arcpy mxd = ...
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1answer
62 views

Openlayers 3 layer style issue

I need to create a layer with meteorological icons on it - about 100 of them. So. I define its source like this: mappingAPI.meteoIconLayerSource = new ol.source.Vector({}); I add icons as ...
0
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1answer
62 views

Having more than one Openlayers layer switcher associated to one map

I am developing an OpenLayers 3 web application were I would like to incorporate more than one Layer Tree alongside my map. I have this JSFiddle set up that it has a map with multiple layers and one ...
3
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3answers
189 views

Copying one or more layers (with properties, style, and path of source data) on ArcMap and paste into different ArcMap project?

I am using ArcMap 10.2.1 and i would like to take all the layers from one plan and bring them into another plan with all of the associated properties.
1
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1answer
42 views

ArcGIS Layer Visibility Shortcuts or Tools

I am wondering if there are ways in which we can enable the layer visibility when holding a key and turn the layer off when releasing the key (in ArcMap). Something like in some online games you can ...
0
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1answer
24 views

Updating and interacting with map layers through a windows form

Using arcobjects I am attempting to connect a windows form with a checkedlistbox, to the layers that I have on my map in ArcGIS. When I first create my form, the list of checkboxes will automatically ...
0
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1answer
59 views

Arcpy - add layer tif

I'm trying to write a python script that will add a tif to the table of contents of my map. (Eventually I want to convert to tool that allows the user to type in the filename and then has the tool ...
2
votes
1answer
183 views

Programmatically get Layer source properties DataType with ArcObjects?

I am trying to access the DataType property of a Layer in the TOC in ArcMap. The layer is added from a web service as an IMapServerRESTLayer. The Data Type property is listed with Layer -> ...
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0answers
48 views

PyQGIS Set Extent for loaded layers - Refresh problem

I've written a plugin which loads a number of map layers (based on constraints) and I would then like to set the canvas extent to a selection of them. Code very similar to that below works perfectly, ...
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1answer
822 views

OpenLayers & Google Maps: TERRAIN not showing as baseMap

I have a problem with OpenLayers and Google maps: on this page: http://46.37.22.75:8085/public/ I'm loading Google maps TERRAIN with Openlayers.js, everything worked well for about 1 year, but now ...
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2answers
60 views

Layered world map

First off I just want to say that I am NOT sure if this is the correct place to ask this question; So if it is not, please direct me to the correct exchange. So for the question: I am looking for a ...
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0answers
23 views

Problem on displaying a layer in overlay on a s57 map

I am loading a s57 file, I select only some layer to be displayed. I am under QGIs 2.8 At this point it is ok, the coordinatereferencesystem is EPSG4326 WGS84 and at the bottom of the windows of qgis ...
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0answers
32 views

VectoreLayer Still Empty even if attribute has been set with value

I am working with the qgis api c++ 2.8.2, my application is written in QT 4.5.3 / C++ I had to create a vectorlayer in memory with attributes and features and export it to a shp file to import it in ...
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0answers
75 views

OpenLayers 2: WMS layer attribution legend doesn't change between WMS layers, it just piles up

I'm using this to put legends in WMS layers. It works nicely when similar layers have the same legend (eg. layer A1 with legend AAA and layer A2 with legend AAA). The problem is when WMS layers have ...
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0answers
29 views

layer name and longName are identical when they shouldn't be

I am attempting to use a script to re-source a bunch of layer files in a folder (adapted from Unable to change data source path for group layer file): import arcpy, datetime, os, io, sys def ...
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0answers
47 views

Make “qgis:delaunaytriangulation” and “qgis:dissolve” save their outputs on a specific predefined layer

I'm new to python and QGIS. I'm working on modifying a plugin which runs algorithms "qgis:delaunaytriangulation" and "qgis:dissolve" like so delone_triangles = ...
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0answers
11 views

Divide/Split single polygons from one Shapefile using ArcGIS for Desktop? [duplicate]

I have a map of Austria which shows all the federal states in own polygons. As a whole - sure - you get Austria. I know how to make several states invisible so that you can just see particular states ...
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0answers
29 views

Styling MSSQL Layers in QGIS

I have set up Ordnance Survey MasterMap as 2 MSSQL layers (area and text) which are working great, I can style the layers as I would do usually with shape files but I'm struggling to work if it's ...
1
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1answer
28 views

Prevent Overlapping Features in QGIS from Being Faded

I have multiple layers in QGIS that I've set as transparent so I can see their respective features. However, I would like one layer (showing proportionally sized points) to NOT fade when it overlaps ...
2
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1answer
69 views

How to load a style from POSTGIS in PyQt

The thing is that I have four styles I have created in QGIS through the GUI and saved into a postgresql database. I can see them in the table named layer_styles I have seen similar questions asking ...