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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23 views

Changing Query Layer's SQL Expression with Python

I use query layers in ArcMap 10.4. The maps need to be done/repeated periodically. The easiest way is to copy the map, change the source's SQL expression (e.g. from select * from TABLE where Period = ...
2
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1answer
28 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 ...
2
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1answer
13 views

Quartiles from Raster Layer band

I'm building a plugin from QGIS, and I need to extract the values from the quartiles from a band in a raster layer. Does anyone knows how it is done?
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0answers
17 views

QGIS Composer keep reference after reloading layers

I have written a plugin which loads a bunch of geojson data via REST for a specific region, which is selected by the user, afterwards generates some vector grids over the extend and styles all the ...
0
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1answer
18 views

Spatialite union more than two layers / tables

Is there a way to union or collect any number of layer geometries with Spatialite (or another spatial database)? Two is simple enough, but more than that becomes convoluted. For example, if all I want ...
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1answer
11 views

Geotools : adding multiple points to the same layer

I've got a java Swing application which loads a shapefile and draw a map. Now I need to allow the user to click on the map and add points. I've successfully completed that with the following code. ...
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2answers
379 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 ...
2
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1answer
292 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
16 views

How can I publish a layer with default visibility true/false in geoserver?

I have published layers on geoserver but a few layer- I want to publish as default visibility = True just like below (ArcGIS server has this property). right now most of my layers are coming with ...
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2answers
47 views

How to get layers in x number of subgroups?

I have a project which has dozens of groups and subgroups. E.g.: Main_Group > Sub_Group_1 > Sub_Group_1A > Layer_1A > Layer_2A How can I access ...
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1answer
248 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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2answers
25 views

Repair data source for all layers simultaneously using QGIS

In QGIS 2.12 i opened a map after i changed it location in the hard disk. Hence, all layers must be repair. I know the option to fix every layer separate, but i didn't find an option to "repair data ...
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1answer
522 views

Is it possible to have dynamic layer names in QGIS project?

I have a QGIS project with layers, based on PostGIS SQL queries that use current date. Since the data in the database changes, these queries return different data every new day. Is it possible to ...
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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 ...
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0answers
49 views

Changing order layers are displayed in using MMQGIS?

I am dealing with hundreds of different layers, all of which have one of 6 names - not by choice, that's just the way they show up when I import them. I am trying to merge all those with the same ...
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1answer
22 views

Creating new layer using selection from attribute table in QGIS?

How do I create a new layer using a selection from an attribute table in QGIS 2.10.1? Previous answers on this topic do not help -perhaps because they relate to older versions of QGIS
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1answer
45 views

Remove layers using python- path orientation

Expanding on my previous question Code error - remove layer using python, i try to remove layers from mxd's (in ArcMap 10.3, python 2.7.8), that don't appear in the data frame with this code: import ...
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2answers
657 views

Add multiple Layer files in subdirectories to mxd using python

I have more than 300 layer files located in many sub-Folders and sub-sub-Folders. All Sub Folders are located in one large directory.I read Use python to add layers to TOC and I try, with arcpy, to ...
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3answers
2k views

Adding shapefile as layer in ArcMap via Python scripting?

I am trying to automate various tasks in ArcGIS Desktop (using ArcMap generally) with Python, and I keep needing a way to add a shapefile to the current map. (And then do stuff to it, but that's ...
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3answers
401 views

Insert layer file to specific data frame

I have a folder that contain mxd's projects. Each mxd has 3 and more data frame. I want to insert layer file to a specific data frame with position in the TOC. I don't know how to do it. I'm trying ...
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0answers
8 views

OL3 Layer z-index not rendering layers correctly

I've attempted to create a map with several base layers and several additional layers that should render on top of the current base layer. I've placed the base layers in a layer group and given that ...
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3answers
31 views

Cannot find data source to set data source for layers in MXD?

I got some data in mxd format and when i try to open it: I tried to set data source but i cannot find the data source because the orginal file was saved in H:\drive and i do not have h drive on my ...
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0answers
9 views

How to divide bitmap into differnet layers by RGB color code in MapInfo

I have got bmp file with 7 colors. How to get from this bitmap 7 different vector layers depending on RGB color code? For example first layer is water space with blue color, second is buildings with ...
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3answers
4k views

Using ArcPy to get layer symbology?

Since ArcGIS 10 comes with ArcPy package, i'm wondering it is possible to use ArcPy functions to get Symbology (i.e color, width...) of a layer?
2
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1answer
34 views

Turning Text into Layer in ArcGIS for Desktop?

I am using ArcGIS 10.2.2 for Desktop. Can I turn the text boxes which I have inserted on my map into a layer which keeps the same aspect ratio with the map?
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1answer
22 views

Leaflet: Panes and Popups

I have a leaflet map with a circleMarker layer that has a popup. This works as expected. dotLayer = new L.geoJson(dots, { pointToLayer: function (feature, latlng) { return ...
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1answer
240 views

geoserver/openlayers: multiple layer geotiff

I have a geotiff file with multiple layers (46 layers), each layer corresponding to a different date (the geotiff layers corresponding to sea surface temperature, 1 layer per year). I imported this ...
2
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1answer
30 views

save as Layer script not working

I've created script in Python for ArcGIS to save shape file as layer file..the code throws an error ERROR 000732: Input Layer: Dataset D:\core i 5 data\symon assignment\Swat\clipped\buffer.shp ...
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3answers
68 views

Searching for changes of 2 layers based on geometry, Arcgis for desktop (ArcEditor

I´m trying to make a tool that would be able to compare 2 layers of any type (polygon, point, polyline) and find differences between them. Lets say i have a layer of roads (Polyline) from 2005 (layer ...
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0answers
40 views

How to find a layer by name in the QGIS layer panel?

I have a large QGIS project organized with several groups in the QGIS layer panel. It happend to me a couple of times that, when the computer is operating with low resources (low free memory-high CPU ...
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1answer
16 views

Geotools : A layer to draw the traffic volume of a road

I have developed a standalone swing application loaded with a shapefile of a road network using geotools (v.14.3). Now I would like to implement a feature where the user may zoom the map, and at a ...
2
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1answer
212 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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2answers
12 views

Exporting waypoints layers from ArcGIS for Desktop to Google Earth?

Is it possible to export waypoints Layer (ArcGIS) directly to Google Earth? I can export waypoints tables from MapINFO directly to Google Earth via EXPORT MAP TO GOOGLE EARTH tab.
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1answer
228 views

Turning off all layers in MXD using ArcPy?

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
965 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 ...
2
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2answers
41 views

Using QGIS shapefile layer in ArcMap project?

I created a QGIS shapefile layer in QGIS that I want to give to a friend of mine for his ArcMap project. Will he be able to open and use my work?
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0answers
9 views

Geotools : Getting currently click layer from MapLayerTable

I've added a MapLayerTable to my application, and I'm loading multiple layers using shape files successfully. Now I would like to select features on the map of the selected layer. For this, I would ...
0
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0answers
9 views

ILayerFile.Open - The maximum record length has been exceeded

I have been able to use ILayerFile layerFile = new LayerFileClass(); layerFile.Open(layerFilePath); with out any problems until it just started giving me an error. Error: -2147220646 ...
4
votes
2answers
964 views

Setting layer visibility in QGIS Python API

Im having a problem toggling the visibility of map layers in pyqgis (2.4). I have a simple interface, just the map canvas, no legend, and basically a radio button that toggles between two raster ...
2
votes
0answers
11 views

Trigger event after KML Layer completely loaded

I want to set the bounds of my map after a Vector (KML) Layer is loaded. kmllayer.events.register('refresh', kmllayer, function(evt) { map.zoomToExtent(kmllayer.getDataExtent()); }); In the ...
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0answers
19 views

Clip Layer Stack

I layer stacked the Landsat 8 Bands (1-7) in QGIS and made a polygon shapefile. Every time I try to clip my layerstack with the Mask layer I just get a completely black output raster. I want to use ...
1
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1answer
67 views

Looping arcpy.mapping.updateLayers()?

I've got some problems with the following code, found on this answer to Is there a way to auto-update symbology between .mxds for the same shapefile? (Python?): import arcpy.mapping as mmap mxd = ...
2
votes
1answer
2k views

How to overlay roads layer on top of all layers in OpenLayers?

I want to put roads layer (from any source, please recommend some..) on top of my KML polygons and base layer: baseLayer = new OpenLayers.Layer.WMS("OpenLayers WMS", ...
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1answer
235 views

Mapbox GL JS, self hosted vector tiles with missing levels

Using Mapbox GL JS with self hosted vector tiles in protobuf format where it looks for tiles using {z}/{x}/{y}.pb paths. I have a scenario where I only have data for zoom levels 9, 11 and 13. Is ...
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0answers
48 views

arcpy symbologyType is always OTHER, but I need UNIQUE_VALUES

I am trying to load a TIF file to the mxd using arcpy, then add a definition file to map colouring. For one layer I have the problem, that the amount of values will always be different, sometimes it ...
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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 ...
5
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0answers
193 views

Is there a limitation on the numbers of layers that can be displayed in QGIS?

I have been looking for an answer to this question for the last several weeks, so hope that someone here has encountered the same issue and has a viable solution to my problem. I am currently using ...
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1answer
280 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 ...
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0answers
18 views

Draw nearest points for specific point-line couples

I have a network made of several segments and some nodes located in the map. What I want to do is to choose individually a couple node-segment and find the location of the closest point to the node ...
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1answer
864 views

Why does arcpy.mapping.Layer give Runtime error: CreateObject Layer invalid data source?

I want to connect an existing .lyr file to a variable defined as lyr2. lyr2 = arcpy.mapping.Layer(r"C:/Iso100Red.lyr") Although its a .lyr file I´ll get this Errorcode: Runtime error : Object: ...