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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1answer
48 views

How to set an x-offset for my whole linestring/layer?

Supposing I have a layer imported from GeoServer succesfully, and it looks like this: (some will remember me from my previous question. And, yes, that is my city Volos, Greece. There is a map and a ...
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1answer
56 views

Problem showing WMS with EPSG:3301 projection using Leaflet

I am trying to show wms layer EPSG:3301 using leaflet, but have no succes for a long time. http://kaart.maaamet.ee/wms/alus?service=WMS&version=1.3.0&request=GetCapabilities Here is my code: ...
2
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1answer
131 views

How to get layer type in OpenLayers 3?

I would like to iterate through all of the added layers in an ol.Map instance and only select the vector layers. So far I could get the individual layers with the a property of the resulting object of ...
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1answer
62 views

How can I change layers visibility while I zoom in geoserver?

I want to change layers visibility while I zoom , here are my screenshots. where is my error ? I'm waiting your helps , thanks.
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0answers
65 views

Help embedding Openlayers map in Eclipse BIRT report

i have this code, it displays the zoom buttons only but it doesnt display my map. what could be the problem? <html> <head> <script ...
2
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1answer
37 views

How to Raster Layer checked status change?

I make plugin with use QListWidget. Items of QListWidget is Raster Layer name. When selected items, same name layer checked status changing. current my code is items = ...
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0answers
32 views

Multiple Layers in Geoserver

I have a problem with Geoserver with multiple layers. At the moment the idea is to print a map of Europe, then paint 3 layers on top of this to get 3 different values matches up in a polygon. However ...
4
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1answer
79 views

Removing some bands or layers from a tiff using gdal

I have been working on a multiband raster image. It is a pix image. I need to just work on the 26 bands that are raster files and not the 4 bitmaps that are are also included in the pix image. I could ...
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0answers
58 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.
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0answers
86 views

leaflet layer control checkbox options min/max

I have a straight forward leaflet map that is on a webpage. I am using the angular-leaflet-directive and all works as expected except for the layer control box. When only one baselayer is specified I ...
2
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0answers
66 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 ...
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1answer
27 views

Legend hangs with large featurelayers at startup

My problem is that I created an app with a lot of services that the user can use. The problem is that when I implement the legend widget and the code goes over startup(), the app becomes stuck and it ...
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1answer
43 views

How to use a Geojson layer as a background mask?

I have some Geojson neighborhood shapes that I am using to create a small multiples chart. They are like this: I want to give them backgrounds for the area they represent. I want the streets and ...
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0answers
10 views

How to re'display feature after using my 'filterFeature()' function?

The code below is a function that hides a certain region in the map. The problem is that I can't redisplay it. I've tried by removing this line: wfs2.features[i].style = {visibility:'hidden'}; but ...
3
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1answer
44 views

How to change the color of vector layer of QGIS in api?

I'm using QGIS-2.4.0 api to develop app in C++. When I add a vector layer to the app, the vector map's color would be random. I used QgsFeatureRendererV2 to get the geometry type of the layer, my ...
2
votes
1answer
60 views

Perform a group by query on geodatabase in ArcMap

I have a geodatabase called predictions.gdb and a feature class called output_gis_120_Project in that database. I imported this feature class as a layer in ArcMap. The attribute table with columns ...
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1answer
43 views

Combine drainage streams and watersheds [duplicate]

I have a question regarding ArcMap. Lets say I have a .shp with watersheds and a .shp with drainage lines. How can I combine both, so that I can display single watersheds and the length of their inner ...
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1answer
66 views

Merge KML layers into one

Using data exported from Google Earth I ma trying to plot restaurants over a large area. To collect all the data for the area I had to use several searches in Google Earth and these are shown when ...
2
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1answer
38 views

TileMill: How to mask layer without loosing background

I have a large geotiff with elevation gradient which I want to use to colour my map. However the coastal line of the geotiff doesn't excacly match my shapefile so I want to mask it. The problem is ...
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0answers
35 views

Openlayers - Maximum number of layers in LayerSwitcher

I am working on a thematic mapping platform showing data at local administrative levels. I have many layers, so I run into problems (see screenshot: http://gisintersect.com/many_layers.png). Is there ...
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1answer
49 views

Making Layers change color based on attribute expression in GeoServer?

At the moment I'm working with a dataset that has a count value as the only value in the database. However, if I add &VIEWPARAMS:Sex=Male to the given url from GeoServer, the results change based ...
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0answers
60 views

ComboBox Addin to populate Layers .NET C#

I am using Arcgis 10.1 and created following class derived from ComboBox. class LayersComboBox : ESRI.ArcGIS.Desktop.AddIns.ComboBox I want Combo box Add-in to populate added layers(in table of ...
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0answers
19 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 ...
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2answers
57 views

Using live feeds from ArcGIS Online for analysis?

I would like to import into arcGIS Desktop a livefeed layer and use it to perform some analysis. This is the link to web page: ...
1
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0answers
35 views

QGIS cannot open layer properties

I'm trying to open (vector) layer properties in QGIS 2.2.0 and 2.4.0 (Windows 8.1) and nothing is happening. The application freezes and not responding at all (requires cntrl+alt+delete to close). I ...
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1answer
77 views

Is the MakeFeatureLayer temporary location the same as “in_memory”? [duplicate]

From the ArcGIS Desktop Help: The layer that is created by the tool is temporary and will not persist after the session ends unless the layer is saved to disk or the map document is saved. ...
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0answers
64 views

ArcGIS SDK for .Net (used in WPF): update map's zoom parameters after changing base layer

I'm having the following issue: Suppose I have a Map object and 2 base layers (a world map and a street map). A world map doesn't let us view the map too closely. The street map allows us to view as ...
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1answer
36 views

Selecting correct ArcGisFeatureLayer to query onSingleTap event?

My problem: I'm working on a Android (ArcGis) Attribute Editor following the sample code from their tutorials. The problem occurs when I have more than 1 ArcGisDynamicLayer and, more important, more ...
3
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0answers
42 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
64 views

OpenLayers get single layer from WMS multiple layers

Openlayers enables to declare multiple layers in one WMS layer class. var nasa_wms = new OpenLayers.Layer.WMS( "NASA Global Mosaic", "http://wms.jpl.nasa.gov/wms.cgi", { ...
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0answers
86 views

How to enable Map Tip display text in qgis and qgiscloud?

I'm using the free version of qgiscloud and qgis 2.4. I noticed that if I'll use the HTML option in "Map Tip display text", the map in qgiscloud will only show the title of the layer when I ...
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0answers
107 views

Missing Raster/Vector Layers after converting KMZ using KMLToLayer tool of ArcGIS Desktop?

I am trying to write a tool that will let users upload a KML/KMZ file and then be able to view it in a client application (something like an esri js api or Flex app). I am ok with storing the data in ...
0
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1answer
107 views

How to query postgres with gis to get GeoJSON for GeoJSON tile layer?

I have a postgres database with one table like the following: CREATE TABLE post_pl ( gid serial NOT NULL, zip character varying(5), zip_n integer, city character varying(50), geom ...
3
votes
1answer
124 views

Using Python Add-In to delete/remove ArcMap layers that are turned off?

I have made a python addin button which removes layers that are turned off in an MXD. The strange thing is that I get different results depending on whether I run the python commands in the python ...
3
votes
1answer
69 views

Change projections depending on the zoom level

Is it possible in ArcGis (from a technology/performance/… point of view) to switch projections depending on the zoom level? For example, Is it possible when zooming at some extent to the poles, my ...
1
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0answers
23 views

arcgis flex api turn on/off group layers

I just started using ArcGIS API for Flex. In my case I need to provide a widget to turn on and off several layers together, which means these layers need to be turned on together or turned off ...
4
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2answers
121 views

Layer just for annotations

Im relatively new to QGIS and would like to know whether or not I can save my form annotations to a layer so I can turn them on or off.
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0answers
32 views

How to configure a write only layer on Geoserver?

This is probably a wrong way of doing it, but I was exploring this option only because I do not know how to implement the right solution. We have a layer to which features are added using WFS-T. We ...
6
votes
4answers
543 views

Is there a universal map/ layer format?

Just wondering if there is a universal map format that all GIS software can read. ie to quickly share layers with all our partner agencies which have different GIS Software, rather than have to ...
3
votes
0answers
166 views

Startup python script to re-join layers

In QGIS 2.2, there is a bug which involves using the JOINS properties on a vector layer (that is already being joined with several other vector layers) whereby the attributes are not fully loaded. ...
4
votes
1answer
51 views

Summarizing different (local) shapefiles/sources into one centralized database using ArcGIS for Desktop?

Using ArcMap/ArcCatalog 10.2, is there a way, to summarize a huge number of widely spread shapefiles/sources (different servers, different hard drives etc.) into one centralized database, in order to ...
1
vote
1answer
42 views

Determining active layer regardless of its name using ArcPy?

ArcPy has a method of defining an active map regardless of its filename or path: mxd = arcpy.mapping.MapDocument("CURRENT") I wonder if there is a similar way to define an active layer. I need it ...
1
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0answers
68 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 ...
2
votes
1answer
48 views

OpenLayers - cannot set layer opacity

I have the following problem: by default, you can simply change the opacity of layer by writing for example: layer.setOpacity(0.3); But when I add it to my map SelectFeature controls, my layer is ...
3
votes
1answer
77 views

Hotkey in ArcGIS for Desktop to delete layer from Table of Contents?

I'm using ArcGIS 10.2 for Desktop and wish to remove/delete a layer from the Table of Contents. I cannot find such hotkey. I have tried the DELETE button but that does not do it. Also such hotkey is ...
2
votes
2answers
111 views

How to export all the layers from Table of Content to shp file?

I have got lots of different layers in the Table of Content panel in ArcMap. I want to export them all in shp format in one go. How can I do that? So far I have been doing it one by one by right ...
2
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0answers
38 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 ...
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0answers
13 views

Proper updating of new memory layer geometry?

Current workflow for a toolbar button: -create memory layer -save memory layer to shapefile Then the user uses the built-in QGIS tools to add geometry and finally saves changes via the auto prompt ...
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0answers
45 views

Vector layers without geometry in QGIS?

Using QGIS, I have set up a couple of automated layer additions via the toolbar. After adding geometry in each respective layer (point, lineString, polygon) and saving changes to the layers, the added ...
2
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0answers
55 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 ...