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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2
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1answer
66 views

Create Layer With Selected in QGIS

Came across this "Create layer with selected" button in the result for a Spatial Query in QGIS. And simply, this creates another layer from the same source with a query on the IDs. Does anyone know if ...
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1answer
15 views

Proportional circles as function of value NOT range

I have two point layers, each containing one column of values. When using the graduated style in layer properties, the size of the points is relative to the total range of values within that layer . ...
1
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0answers
11 views

Leaflet map with 'query of features' on mouseover and multiple layers

I have produced two working Leaflet maps that in total contain the features that I need for my application. However, I cannot solve how to have multiple 'overlay' layers that can be queried with ...
1
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0answers
14 views

How can I stop crashes when opening layer properties after adding SVG paths?

I am running the most recent version of QGIS, 2.14.3. I recently added several folders to the locations of of SVG files, but I opened the Style Manager and removed them when the crashes started. ...
1
vote
2answers
37 views

Running Python script that includes ArcPy functions?

I have to export about 250 layers in one mxd File to maps in ArcGIS 10. I found a script on this site at Exporting each layer in map to separate image using ArcPy?: mxd = arcpy.mapping.MapDocument(...
5
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1answer
2k views

Exporting each layer in map to separate image using ArcPy?

I have a mxd file with multiple layers I have to export to PNG/JPG. I would like to create a script which turns on layers one at the time before they are exported. So far I have come up with the ...
2
votes
1answer
38 views

How to ignore “handle bad layers” in QGIS?

I have a QGIS (2.14.3-Essen) project that I use both at work and at home. I keep all but two layers with the project. The two remaining layers are very large - a DEM and hillshade totaling more than ...
0
votes
1answer
73 views

Subtracting two layers in MapInfo?

I have two tables, one is a cartographic map and the other is the map of all lakes. Some of the lakes are in-land and so they are not excluded from the cartographic map. I want to calculate the area ...
-1
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0answers
9 views

Code in jscript for application to show drop down list; values of list to be get by the dynamic layer service?…zoom to the selected value [on hold]

I am developing application in jscript. i want that from a dynamic layer the value of different zone it will collect and show in dropdown list and will click on the value(any) it zoom to that zone
1
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2answers
456 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 ...
1
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2answers
34 views

Leaflet, changing base map CRS

So i am using leaflet in order to create my project, which is a world map that certain layers would be add on top of it. I am wondering whether I should change the CRS property of the map object, ...
1
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0answers
15 views

Maximum likelihood classification- changing class colour with every layer

I created a signature file, where I defined 4 different classes, which I named and coloured specifically. When I try to use the maximum likelihood classification tool for other layers, the classes ...
2
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0answers
47 views

QGIS Atlas zoom to intersection between two different layers

I have two polygon layers, one is about different land owners boundaries and is used for atlas generation, and the other is about forests inside each property. In atlas generation sometimes i want to ...
1
vote
1answer
25 views

Can I save the symbology of all the layers in my mxd so that I can quickly revert back to a certain “look”

I am using ArcMap 10.2 and would like to set multiple variations of the layers symbologies. In autocad this would be the equivalent of setting the layer state.
1
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1answer
15 views

Arcpy MakeFeatureLayer_management issue using SQL condition

I have a lines shapefile. I made a small code to select some of its elements and turn them into a standalone layer. The code is like this: arcpy.env.workspace = r"C:\MyDirectory\Mygdb.gdb" network = ...
2
votes
1answer
403 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 -> ...
0
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0answers
12 views

Lava simulations, layers totaled [closed]

I have a number of lava flow simulations. Many overlap and so cannot be seen clearly. I am hoping to produce a layer that includes all the simulations and indicates the areas of overlapping lava flow ...
1
vote
1answer
21 views

lyr replaceDataSource not reflecting

The changes I made to the MXD with ArcPy is not reflecting the changes in ArcMap. arcpy.env.workspace= "C:\Users\UserID\Desktop" mxdlocation=os.path.join(arcpy.env.workspace,mxdname) mxdloc = ...
1
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0answers
45 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 ...
1
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1answer
298 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 ...
4
votes
1answer
86 views

How to load multiple vector layers into QGIS' map canvas using python scripting?

I am trying to write a standalone script in python to create a QGIS map canvas. The vector layers I am attempting to load are Shapefiles. Currently, I am able to load each vector layer, add them to ...
0
votes
1answer
34 views

How do I make two layers of point data align perfectly?

I have two point data sets that represent the same business locations, however, the points are slightly off for one of the two layers. As in one layers points are in the correct position over the ...
-3
votes
0answers
15 views

display buffer turf only when i click on a layer [closed]

I want to display turf buffer only when I click on a layer var pt = { type: 'Feature', geometry: { type: 'Point', coordinates: [lat, lng] }, properties: {} }; var unit = 'miles' var ...
0
votes
2answers
25 views

How to Close all Layers but keep Tables on MapInfo using MapBasic

I'd like to know how to close all the layers on MapInfo but keep the tables open using MapBasic code. The idea is to be able to keep the tables open so that I can create multiple different maps using ...
0
votes
1answer
2k 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 ...
1
vote
2answers
54 views

Mapbox GLJS - group layers

I'm trying to build an interactive map, without any knowledge in javascript, and i found myself a bit lost in this large world. I've already designed my style in mapbox studio. And now, trying to ...
1
vote
1answer
21 views

Can I split my data based on the polygons in a different layer?

Carto has a built-in dataset with polygon data for UK administrative regions. I have put another layer over this, containing several thousand data points (postcodes). Is there an easy way to find out ...
0
votes
1answer
195 views

Publishing QGis project on Geoserver

Is there a way to prepare a project on QGis with many layers and to publish it under wms service on Geoserver? Thank you for responses
1
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0answers
28 views

Problem in layer overlapping (qgis)

I want to plot gps pts on qgis (version 2.14.1). I have added the vector layer of SE Asian countries, and added the delimited text layer of my gps pts which included species name, lat and lon. ...
0
votes
2answers
670 views

Is there a way to display more than 10 categories in cartodb?

I'm creating a map in CartoDB. I have roughly 18 categories, but each of those has a sub-category, which is 'yes' or 'no'. Currently I am displaying the 18 categories in two different layers to get ...
2
votes
1answer
35 views

Iterate through layers of an MXD

I found this, under the topic How to iterate through layers of an MXD? answered by Midavalo I wanto to know if its possible to change something in the second line, to iterate through all data frames ...
0
votes
0answers
10 views

Loop Quality layers of Modis in R

I want to parse quality layers of Modis MOD13Q1 in R. I´m using a code from another question here! and it works fine, but i want to loop it for 300 files. I grouped them in stack of rasters and tried ...
0
votes
1answer
24 views

Showing only 1 layer at a time in CartoDB

Is there a way in the free CartoDB to set the layer selector so that you can only select 1 layer at a time? When one layer is selected, deselect all other layers.
1
vote
3answers
37 views

Layer File data source

I have saved group of layers which are reading from SDE DB as layer file. When I open the layer file in any other MXD it takes the same SDE data source. How can I make the layer file without a data ...
0
votes
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 ...
1
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0answers
30 views

Add qlr file in QGIS- problem

I work with a polyline layer: and the layer located in "G:\desktop\qgis\lyr". After i save the layer in qlr file and saved it in "G:\desktop\qgis\lyr", i try to load the qlr file with "add from ...
1
vote
1answer
1k views

Changing color of symbol in UniqueValuesSymbology object using ArcPy?

I have an template mxd I reference with several pre-defined layers. The only variable I need to modify is the color of certain symbols in the layer. I have tried to modify and dig around the Symbology ...
0
votes
1answer
48 views

Grouping layers in Table of Contents in ArcGIS for Desktop?

I'm trying to group layers in the table of content so that I can expand or collapse them as needed. Not sure how. I'm using ArcGIS 10.3 for Desktop.
0
votes
1answer
59 views

How do I access graphic information from an element in an ArcGISDynamicMapServiceLayer? (Flex)

I've got a Flex application that shows pipeline data on a touchscreen map (for an exhibit). The spec mandates that tapping an element on the map (such as a power plant or substation) will trigger a ...
1
vote
1answer
314 views

Automated map export, iterating layers and editing text

So just a beginner here. I've been automating a few map exports with ArcMap, I've used stack exchange to mash together some scripts to export maps with one FC symbolised using different fields and ...
0
votes
0answers
16 views

Generating detailed layer properties report [duplicate]

Would anyone advise me how to generate detailed layer information report in ArcGIS 10.3. I mean the details described by layer properties window for a layer like Source, Display, Definition Query, ...
0
votes
0answers
10 views

Custom map : Layers, sublayers and public transport directions

My objective is to create a custom map for public transport with several layers in it e.g: Under a layer named 'Leisure', I can have several bus/train/boat routes(multiple steps may be involved) I am ...
2
votes
1answer
227 views

How to remove a layer and its legend in a standalone pyqgis application?

In continuity in my question How to add a legend to a canvas in a standalone PyQGIS application? > In every addition of a new layer in my standalone application, the legend lengthens and becomes ...
0
votes
0answers
13 views

GeoServer: Composite and blending for specific layer in WMS call

I use the destination-in vendor option to use a polygon layer like a mask, so that only some parts of a raster layer are shown. The sld is defined for my polygon layer. In my WMS call a specify both ...
3
votes
1answer
71 views

ArcMap can't switch layers order

I have 5 different layers. I would like to change the order they are drawn. I read that (and I also used to) simply select and drag the layer from in the position I want. Nevertheless, now I am trying ...
0
votes
0answers
27 views

Files added using *.qlr result in bad layer after save and reload

I'm converting CAD to Shape (separate point, line and area shapes per *.dwg in a folder). In the process I parse the shape info to a donor *.qlr (to the same folder). The qlr is a donor file with ...
13
votes
3answers
528 views

How many layers are too many layers in ArcMap?

I work on ArcGIS using a Citrix virtual software connection at work. It is dreadfully slow at times, and without any changes to the MXDs I'm working on, one minute ArcMap can be operating at a ...
0
votes
1answer
79 views

Coordinates from Excel list

I'd like to import Coordinates from an Excel list, for this reason I saved the excel sheet as an .csv ant tried to import it via "Layer --> Add delimited text Layer". The points are imported, but with ...
3
votes
0answers
32 views

PyQGIS select layer by original table name

As far as I see, on QgsMapLayerRegistry.instance() there is a method to select layers: mapLayersByName(Qstring) and the method mapLayer(QString) respectively, wich accesses a layer by its id. ...
0
votes
2answers
43 views

Removing duplicated layers using ArcPy?

I work with ArcGIS 10.3.1. I my map i have 200 layers. some of them repeat several times. Is it possible with python code to remove all duplicated layers from table of content, that have the same ...