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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134 views

How to speed up simultaneous working with PostGIS layers in QGIS?

we are working on one big layer at the same time (10-20 people). Some of us use QGIS 2.8.1 and the other 2.6. The user with 2.8 have a lot of crashes (QGIS). The 2.6 users don't have this crashes but ...
5
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194 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 ...
3
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0answers
27 views

gdal_translate multiple GDAL_PDF_LAYERS_OFF entries gives error

The documentation says that GDAL_PDF_LAYERS_OFF takes a list of comma separated layers. Examples look just like what I am trying to do. Executing the following gives an error FAILURE: Too many ...
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 ...
3
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0answers
109 views

Sourcing free live traffic layers to use in MXD of ArcGIS Desktop?

I am looking for free live traffic layers for an ArcGIS Desktop 9.3 MXD. My searches haven't been that successful.
3
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349 views

Batch export to shapefile by attribute field in QGIS

I have a project in QGIS where I am creating a map of plants over a large area. I want to take the "Genus" field (of which there are 100 hundred values) and essentially create 100 shapefiles based on ...
3
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0answers
95 views

Layer tick boxes embedded in PDF map

Maybe this is more of a PDF question than a GIS question. Today, I received a layered PDF map shown as a landscape A3, with a square map on the left, and with the map title, the legend, the scale, a ...
3
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473 views

How to load the default layer style from Postgresql with Python?

I would like to write a python macro that upon opening my QGIS project file will reload the default style for each layer from the postgres 'layer_style' table. I have had a look at the documentation ...
3
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377 views

Getting layers from SDE with vba

Im running arcmap 9.1. i have the code that lists feature classes in a list box from the SDE. The users select from one list box and adds it to another list box. How do i get it to show the layer name ...
3
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418 views

calculate total Miles in a polygon using Google Map

I have an application that allows the users to create any custom polygon layer on top of google maps, i am interested to know if their is a way to select the road layer in this polygon and then ...
2
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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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41 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 ...
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13 views

Problem Importing CAD features using arcpy.MakeFeatureLayer_management?

When importing multiple CAD drawings using "arcpy.MakeFeatureLayer_management" and "arcpy.Merge_management" I encountered a problem. Drawings that have line weights and elevation values assigned to ...
2
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0answers
30 views

How to intersect layers that do not completely overlap in QGIS?

I have two layers in QGIS that I want to intersect in a specific way. On one side I have a layer of the different biotope types in the city of Berlin. On the other side I have a layer of the ...
2
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0answers
62 views

Setting extent with python in QGIS in new project

Situation: I am trying to write a simple python script for QGIS. The script aims to load one layer, zoom to given coordinates, and 'place a pin' there. The coordinates will change every time I run the ...
2
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90 views

QGIS Space Syntax plugin with OSM data?

I'd like to do a space syntax analysis for a city I observe, but when I use the Space Syntax Plugin, the desired shapelayer roads doesn't show up. It's an OSM vector layer, what do I have to do to ...
2
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0answers
32 views

QGIS, add a layer (shapefile) to a running QGIS from an external application

I'm trying to load a shapefile as a new layer into a running QGIS application using python within a Windows command shell. The python is basically what is explained in this post: How to open a layer ...
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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88 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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268 views

Leaflet : Change marker icon from onEachFeature instead of pointToLayer

I'm referencing external data, matching it up with particular fields in feature.properties and using that to decide which layer to put the feature in, all of this from inside the onEachFeature part. ...
2
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0answers
104 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 ...
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283 views

Leaflet filtering existing featuregroup

I have a leftleat map and i would like to filter the featuregroup i am displaying. exp_colJSON = new L.geoJson(exp_col,{ onEachFeature: pop_col, pointToLayer: function (feature, latlng) { ...
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138 views

Error when running Python script to replaceDataSource of multiple layers in multiple mxd's

I looked on all of your sites and did not find a solution to my problem. Almost all of our data has been copied to an SDE and now most of the layers in all of the mxd's need to be redirected to the ...
2
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0answers
289 views

ArcGIS API for Silverlight : query that displays layer attributes in a dataGrid

I'm working with ArcGIS API for Silverlight to build a webmapping application and I'm trying to display my attributes in a datagrid. I made a try by using this code : void ...
2
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26 views

QGIS view selected layers, manage views

I have a QGIS project with a large number of layers. Is it (without using Postgis) possible to define "Views" which include different subsets of the layers? For example: View 1: Layers WMS ...
2
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192 views

What is wrong with my data receiving from php script for geoJSON TileLayer?

I want to get geo data as geojson for geojson tile layer requests in leaflet. I set up a geojson layer like this: https://github.com/glenrobertson/leaflet-tilelayer-geojson/ A php script answers ...
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233 views

Memory layer or QgsVectorFileWriter Error?

Currently this excerpt of code will not save to file (as it is supposed to). The memory layer is visable and editable. Yet even when manually saving the layer, any priorly added features ...
2
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0answers
202 views

multiple image in OpenLayers

I'm fairly new to OpenLayers so please bear with me. I'm trying to add multiple images to OpenLayers. I have the following (some code is excluded): var images = [image1,image2,image3] // these are ...
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70 views

Updating Description of MXD Layers

Is there a way to force the update of the Description content in the Properties/General/Description of each feature layer in an MXD? I frequently update metadata for each feature class in ArcCatalog, ...
2
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0answers
107 views

Is there a size restriction on KML layer in esri map?

My website utilizes ESRI's map and it contains several KML layers. Most of them show up fine except for the ones bigger than ~4MB. Are there any restrictions on KML file size? Thanks,
2
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0answers
133 views

why is my map is not in the center when I load my map in OpenLayers?

why is my map is not in the center when I load my map in OpenLayers?And when I drag my map,it dont move sometimes,It has been tortured me for a long time,any advice would be grateful! var maxExtent = ...
2
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0answers
47 views

How to search for layers in the layers panel?

I have QGIS projects with a lot of layers. Sometime it's difficult to find a layer into Layers Panel. How to search it?
2
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0answers
54 views

What is the best way to manage dependencies between layers?

I have multiple layers that has dependency with each other. Such as: City; Courts; Lots; Front Lot; Buildings. The polygon's "block" depends on the polygon's "City." Example dependency: Buildings-> ...
2
votes
0answers
193 views

Ogr: How to add layer description to dgn?

I have created a dgn-file using Ogr, but can't find a way to fill out the description for this layer programatically. (something like _dgnLayer.Description = "Highways") opts.Add("SEED=" + ...
2
votes
0answers
197 views

The layer added did not move in ArcGIS 10

I have a favor to ask. I already done the step that Mr PolyGeo and Aaron gave me from my previous question and it really look great when the layer did match all together. Thank you for that advise. ...
2
votes
0answers
671 views

Add CAD Drawing Dataset into ArcMap using Python

I am trying to add an CAD Drawing Dataset into ArcMap using Python. Question is how to add a Auto-CAD .dwg file to ArcMap using Python Normally comes in as CAD file within a Group layer with: ...
1
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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 ...
1
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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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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 ...
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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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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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0answers
25 views

Avoiding lost layers when using QConsolidate?

I want to save all the files in my project and the project file locally on my computer. The files are currently saved on a external hard drive. I have tried QConsolidate before, and it worked, but ...
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0answers
44 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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0answers
19 views

Qgis, resolve bad layers

How to resolve bad layers and locate files on my computer?
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0answers
30 views

Android WebMap Popup Viewing not showing my layer info

I used the code for WebMap Popup Viewing from ArcGIS for Developers (https://developers.arcgis.com/android/sample-code/webmap-popup-viewing/) and I just changed the map URL with a map I created and ...
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0answers
58 views

Arc Collector offline map - Copies of a map layer not downloading correctly

I have an Arc Collector project on the go and everything is working great except for one part of the offline mode. I encountered an issue with the offline version of the map displaying the layers ...
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55 views

First click layer selector doesn't work in CartoDB?

I'm working on an interactive map using CartoDB built of Leaflet.js. I added a layer selector which works fine after the first click. The first click just doesn't work, if I click the selected layer ...
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86 views

is it possible to combine multiple URLs for one ol.layer.tile in openLayers 3?

I have two Image services that I would like to combine into one layer; one has higher resolution imagery that draws only at a larger scale, and other has lower resolution imagery that draws at all ...
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0answers
59 views

ArcGIS layer transparency Issues

I'm using ArcGIS 10, working on the district boundaries of a country. I need to show certain cycles of a distribution and some of the districts are (partly/completely) covered in each cycle. Is there ...
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0answers
64 views

How to align with QGIS two layers that have the same projection?

I am using QGIS 2.12.0 to create forest maps. I usually succeed to create maps from shapefiles with different projections but for some reason I cannot succeed to align the layer of one shapefile. As ...