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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OD Cost Matrix (arcpy) Layer Not Added

I'm trying to create a OD Cost Matrix layer programmatically. The problem that I have, however, is that the layer doesn't get added to my Table of Contents. If I manually run the Network ...
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24 views

Changing color of individual parcels in CityEngine?

How do I change the color of individual parcels (i.e. specific section of a layer) using CGA codes in CityEngine? I have 4 sections within my layer and I need to change the color so that each one ...
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66 views

How to add filter to mapguide layer definition in c#

I want to add a filter to a mapguide layer programmatically in c#.net. I verify if the layersDefinition of my layer contains or not a tag "Filter" and I do the job: //Get mapguide layer definition ...
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21 views

Is there a way to re-order how layers render in Mapnik?

I'm creating Mapnik stylesheets and I am trying to edit the order layers are rendered. I tried just moving the XML code, but that didn't seem to work. Are there specific steps to make some features ...
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35 views

Removing non-interactable “ghost” points

Non-professional here, working with ArcGIS 10.3 mapping soil data for an agricultural study and I have an issue with residual point features from a file I thought I removed. After I turn off all of ...
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2answers
180 views

Get the name of the layer from a layer Vector

My aim is to highlight that two differently colored layers wfs when passing the mouse over one of these layers. It would need to obtain the name of the Vector Layer and also use a style in one layer ...
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1answer
64 views

Code error - remove layer using python

Continuously to How to remove layers that are not in visible df extent i try to remove layers that don't appear in the data frame with this code: import arcpy,os from arcpy import env env.workspace ...
3
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1answer
87 views

How to merge layers into a single QgsVectorLayer?

I have a set of different layers (and their respective shapefiles) with information of electric lines. All the layers have the same Fields in their Attribute Tables, but contain information about ...
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1answer
152 views

How to remove marker added map with .addTo() function in leaflet?

I am having trouble removing marker which is added with marker.addTo(map). The remove works correctly if added as layer map.addLayer(marker) and then map.removeLayer(marker). But removelayer is not ...
2
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1answer
51 views

ArcGIS 10 PDF exports: toggle polygon layer visibility?

In the past I have been able to export my .mxd to PDF and I have been able to turn individual point layer's visibilty on/off within the layer tab (if the layers are in a groub in the .mxd's table of ...
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69 views

QGIS KML layer won't show up in Google Maps API

I've trimmed US Census shapefile data to show census blocks in just three states, by editing the attribute table. I then color coded the states based on values in the table by changing the style in ...
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26 views

How does qgis render vector layer on screen ? How can I do the same in a mobile device

Can you please tell me how does qgis software render the vector layers on the screen. I have a geojson file and I need to map its contents on the screen just like qgis does but without using base map ...
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1answer
59 views

Can script using arcpy.mapping.MoveLayer() be made to run faster? [closed]

We're running ArcGIS 10.0 and using a python script to move layers, turn on the correct layers, zoom to the correct extent and export a pdf map. The script normally takes 30 - 35 seconds to finish. ...
2
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1answer
33 views

How to display street names from OS StreetAny layer?

Using QGIS version 2.10.1-Pisa. I have imported layers from an Ordnance Survey data set. I have a layer called 'Street any' which gives me the boundaries of the streets which I can see. I can see ...
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1answer
183 views

Layer selection in Openlayers 3

I'm trying to develop a robust way to generate a UI incorporating map layer controls such as a base layer selector. I've read several posts including this recent one but I'm still not able to change ...
2
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0answers
32 views

FeatureServer layer losing connection to Feature Class layers (ArcMap/ArcServer) on adding .lyr

This is a question about using feature services as layers in ArcMap. We have a issue where layer (.lyr) files (source from feature services) are not displaying individual feature classes when added ...
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1answer
32 views

How can I remove feature selection from my layeroverlay in mapguide API?

I can add feature to my layeroverlay on mapguide API, but I don't know how to remove it. Can you help me find a method to remove a feature from a selection ? This is how i add features to my layer : ...
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50 views

Trimming downloaded Worldclim Climate Projection Layers to specific area in QGIS for use in Maxent Program?

I am very new to QGIS and modeling. I have downloaded many Future Climate prediction files(GeoTiff) from Worldclim. I only need to use a small portion of the globe, but they do not allow for the ...
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25 views

Exporting Raster Column

Probably an easy solution here I just cannot think of one. Using ArcMap 10.0 So I have a feature class which has 5 columns. One of them being a "Photo" Raster layer. This has over 2000 Objects in ...
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1answer
68 views

A python script to batch add layers to multiple rasters?

So I have looked at existing tools and there is nothing to batch change symbology to a myriad of raster surfaces (20+). Basically my manual process is to right click on the rasters layer properties, ...
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1answer
59 views

Get the name of the layer when I click on it with openlayers 3

I have a question, I need to make more than one GetFeatureInfo (obtaining information under the layer that you click), and for this I need the name of the layer I click on it to get the information. ...
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1answer
829 views

why can't I load a layers list to select from to the map in openLayers 3, addEventListener and attachEvent are unavailable

I've tried to incorporate this sample that shows how to switch base layers into a page I am working on: http://openlayers.org/en/v3.10.1/examples/bing-maps.html When I try to load my page with the ...
4
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1answer
119 views

GeoJSON Layer Order In Leaflet 0.7.5

I am developing a web application that brings in a number of tileLayers and geoJSON layers. For the tile layers I have been able to do similar to this JSFiddle in that the layers appear depening on ...
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2answers
182 views

Move a layer in QGIS to a precise position based on centroid

I'm not quite sure how to phrase this so apologies if it is a duplicate. I have a project that uses a series of lines created from the boundaries of polygons overlaid onto a map in QGIS. I understand ...
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1answer
22 views

Creating layer where more attributes are presented

I would like to create a layer in ArcGIS containing polylines, that are rendered by combination of more than one attribute. I can create layer where the polylines are of different thickness or ...
2
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1answer
84 views

Best practise for managing shapefiles in QGIS

One aspect of GIS that wasn't covered in my training was the best way to manage shapefiles within a project. In my hypothetical example I have a shapefile with a number of attributes. I want to ...
2
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1answer
307 views

Dynamically add layer(s) to Layer Group

I have an Openlayers 3 app and users can retrieve stored routes from a web service and display them on a map. Currently each route is added to the top of the index but I'd like them to be inserted ...
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1answer
60 views

Remove details from loaded OSM-layer? - Openlayers-3

I have created a tile server with help from this guide. Sadly I still have no software to actually create the tiles and because of that I load in a online map (HOT) from OSM via Openlayers: var map = ...
4
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2answers
224 views

How to activate a layer by its name in PyQGIS?

I'm writing a script that requires the attributes of different layers to work, and I would like to know how to call a layer that is not the currently active one and get its features. For example, I ...
0
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1answer
124 views

Leaflet Layer Visibility Checkbox

I have created this JSFiddle OpenLayers map that toggles the layers visibility using the bootstrap-switch. I am looking to achieve the same with leaflet but can't seem to get the equivalent of the ...
3
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0answers
34 views

OpenLayers WFS Multipoint

I am modifying a OpenLayers setup which uses WFS capabilities to create a vectorLayer on a map to support multipoints. GeoServer is setup to send points and multipoints however only points are ...
2
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1answer
83 views

Fully symbolize a vector field marker in PyQGIS

I'm designing a symbol for an external application that needs to be a vector field marker combined with a simple point marker, displaying a line at a certain angle around the center point. In PyQGIS, ...
1
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1answer
116 views

Optimize my code or get out this process without charge as much RAM?

I'm working with script code in python for some processes from raster layers, my code takes the raster files, create arrays of data, manipulate the data and then creates a rater output with the ...
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9 views

Retrieving data with getFeatureInformation from a shapefile [duplicate]

I checked on this site Heron Map Examples, I found very exciting apps then tried a couple of them out locally on my computer. What I did is I copied all the source code then arranged links properly, ...
2
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1answer
29 views

Is there a way to apply the “Select features by rectangle\polygon…” function on multiple layers simultaneously?

I have put a map together using openstreemap data that is intended to be used as a base for different projects. However due to the amount of information (number of layers) the loading time is rather ...
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76 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 ...
1
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1answer
67 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
119 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
75 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 ...
0
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1answer
57 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
217 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
169 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
52 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
573 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
58 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
295 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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60 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
99 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
87 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 ...