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.

learn more… | top users | synonyms (1)

1
vote
0answers
21 views

Can QGIS2 refresh layers without the need to reclassify each layer individually?

I have a set of layers which I'd like to have refreshed each time I open QGIS2.2.0 (Windows 7). Each of 14 layers (polygons) is linked via a join to a csv file with no geometry. The layer displays a ...
1
vote
0answers
27 views

Can a joined-layer have its attribute changed depending on what layers are selected/deselected?

Using QGIS, I have a polygon-grid layer which covers everything, Layer_All joined with 2 other grid layers: Layer_1 and Layer_2, both of which intersect at various points. I would like Layer_All to ...
1
vote
0answers
41 views

Changing the symbology of layer when converting from Layer to KML using Python

Is it possible to change the symbology of a layer file using Python? I have a script that creates a layer file and converts it to kml, but every time I run it the symbology color in the kml of the ...
1
vote
0answers
174 views

Part of text missing in legend and text boxes

I have had issues lately when exporting to pdf from ArcMap 10.2. Parts of the text sometimes fall off and goes missing. Mostly it's been some lines in legends, but now also text boxes. The text is ...
1
vote
0answers
178 views

Geoserver tile caching

i have a problem with "tile layers". i want to display my layers in tile layers but i always have a blank page. i'm already displaying them in the "Preview layer" with openlayers and it worked. i ...
1
vote
0answers
68 views

Geoprocessing Ungroups Layers in ArcGIS 10.1

Is there a fix for this, am I only imagining this, or is it a bug: ArcMAP 10.1 for Desktop Build 3035 on a 64 bit Windows 7 system When I run a geoprocessing task that modifies the input data (such ...
1
vote
0answers
216 views

How to add a MSSQL spatial layer using Python?

I'm having difficulty adding a MSSQL spatial data layer using Python. The database is password protected, and I can add the layer without any problems using the built in feature, but I can't make it ...
1
vote
0answers
95 views

qgis 1.8.0 crash when starting qthread

I am trying to update a vector layer attribute table using QThread. i connect a pushbutton click with a slot to start the thread: def EGSupdateAttributeTable(self): AttUpdateEGSThread = ...
1
vote
0answers
76 views

Sources for meterological data with high resolution

I was running Maxent on an endemic species of andaman and nicobar.But the climate data I have from worlclim.org ( tile number 29 ) is not of high resolution and thus I can't see the distribution ...
1
vote
0answers
55 views

How to save KML-layers style (Q-GIS)?

Is it possible to save a KML-layers style? My layer is set to 50 % opacity and I want to save that setting into the KML-file. The plugin qgistokml can´t yet do it, and only work with points.
1
vote
0answers
115 views

QGIS layers not adding properly

using QGIS 1.8.0 lisboa on windows 7 pc adding vector layers and they are not adding properly they don't show up in the layers list but they are there when I happen to merge the the layers ...
1
vote
0answers
281 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 ...
1
vote
0answers
215 views

Adding multiple layers to Tilemill from a single sqlite DB

This is a repost of a question I had over at the MapBox support board. Since I wasn't having much luck over there, I'm hoping I would have better success here. I'm having trouble adding more than a ...
1
vote
0answers
289 views

Handling “bad layers” in QGIS version 1.9

I'm having a problem every time I try and open any project in qgis 1.9. It will load part of a few layers and then a yellow bar comes up across the top of the map area that says "Handle Bad layers: 23 ...
1
vote
0answers
239 views

How can I move two layers at once in QGIS?

I'm trying to move two digitized layers, one containing points, the other polygons to a different location at the same time. QGIS doens't seem to allow this. Even if I select both layers and features ...
1
vote
0answers
74 views

proportion of image layer in OL

I tried create map with single image used OL. But I have a trouble: image in map has a wrong proportions. Img: 1540 x 1481 Img in map: 2858 x1481 My js code: $(function (){ var map = new ...
1
vote
0answers
244 views

Layer set visible

I add this layer like this: var POIData = new esri.layers.ArcGISDynamicMapServiceLayer("https://mysite.com/ArcGIS/rest/services/POI_Data/MapServer"); map.addLayer(POIData); ...
1
vote
0answers
71 views

Get layers and apply renderer to layer list from SDE ArcMap

I have the code that gets the layers from SDE, but when i add them to the map they have a different symbology. there is about 80 layers and i am accessing the SDE by getting the workspace from a ...
1
vote
0answers
222 views

Hack to change data source of a layer file in ArcGIS 9.3.1 with python?

I'm looking for a way to change the source of my layer file using python. Actually I want to do this because I need to re-use a XSL template which is defined under the tap HTML popup of the layer ...
1
vote
0answers
102 views

Remake gxp class

I want to remake gxp.editFeature class. In standart class to edit object need to choose it on map. I want choose abject in list of objects and edit it. So To do this i need make a new gxp.editFeature ...
1
vote
0answers
360 views

Using Google Maps with OpenLayers for some zoom levels

I've had a search on here to see if this has come up but I've not found anything, sorry if this is a duplicate. I'm trying to use the Google Maps layers with an OpenLayers site, but not for all zoom ...
1
vote
0answers
378 views

pdf google maps export

In my php+postgis+geoserver+OL application I have to export a map in a pdf file. This map has two layer: the base is a google map layer and a vector layer as overlay. Is there a way to make a pdf ...
0
votes
0answers
24 views

Selection layers ie selection by location or attibute. Are selections retained when the data source is updated

I have a several large feature classes , that are over a large area. I am only interested in an Area of Interest inside the this area. So I have used an Area of interest shapefile and used this as the ...
0
votes
0answers
30 views

Make a group layer in ModelBuilder

I've got a model that iterates through a whole bunch of files and creates layers from certain of those files. I'm trying to put together another tool that will group the produced layer files, but I ...
0
votes
0answers
38 views

ArcGIS creating individual layers for unique attribute in a given feild. Limitations of Where Clause

I am putting together some code that makes a layer for each unique attribute within a given field. So if I had a shapefile that contained point data for locations of say postboxes in every city , for ...
0
votes
0answers
16 views

Need to add an Image over my map

I am working on loading an image from my computer on my map. Using map.addLayer(). No example of ol3 is of help. Can anyone please help me with adding an Image in a layer over the ol3 map?
0
votes
0answers
18 views

Feature Rotation Exception

I am getting an error when I try to change the value of a feature's Rotation Value. I have a schematic feature that I would like to rotate by changing the field's ROTATION value, but everytime I try ...
0
votes
0answers
36 views

How to define layer in QGis like in AutoCad?

I have imported a dxf file into QGis. While the importing processes split my dxf file into three layers - Point, Linestring and Polygon, which are different from the layer in AutoCad. I found the ...
0
votes
0answers
29 views

OpenLayers get feature from layer at viewport position

How can I get a feature from layer at a viewport position, in openLayers 2.12. For example something like... Layer1.getFeatureAtPosition(x,y)
0
votes
0answers
10 views

getFeatureFromEvent from multiple layers simultaneously in OpenLayers

I'm trying to return multiple features from two layers from a user click (one feature from each layer)? I'm using openLayers 2.12. I have 2 vector layers containing polygons, and a container layer ...
0
votes
0answers
17 views

Saving and updating problems with PostGIS-Layer in QGIS

I have a OSM populated PostGIS DB (filled with osm2pgsql). All tables are working fine. But for my work, I need to combine some polygons with some points: create table attraction as select way as ...
0
votes
0answers
38 views

PRACH data plotted in a better way but not completely

I am close to finishing the visualization of PRACH in mapinfo. Here's my output so far (for 4 counters) Unfortunately, for some sectors it is not working as it should be. Can you please help out? ...
0
votes
0answers
53 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) { ...
0
votes
0answers
25 views

Enabling all layers by default using Leaflet?

I am using leaflet maps to compare heat layer and marker layer. I've an option to add multiple marker and heat layers dynamically. For me Heat layers are enabled by default as on when user adds new ...
0
votes
0answers
25 views

Arcgis Layer Guid or unique value

I need to get some unique values, for example ; i have dynamic map and ıt has seven or more sublayers and i need get these sublayers's unique id or guid. i can get sublayers from dynamiclayer on ...
0
votes
0answers
119 views

ArcGIS API Javascript Server creating a dropdown menu

I am trying to rebuild this ESRI example with my own feature layers: https://developers.arcgis.com/javascript/jssamples/dataadapterfeaturelayer.html Since I just want a dropdown menu existing out of ...
0
votes
0answers
167 views

ogr2ogr - extracting S-57 layers

I'm trying to extract the layer DEPARE from an S-57 datafile and convert it into a shapefile. I'm using ogr2ogr from OpenGeo Suite 4.5 (GDAL 1.11.1) on Windows 7 64 bit. The problem is that when I ...
0
votes
0answers
157 views

Error with GeoExt.data.WMSCapabilitiesStore + gx_wmslegend

When I use this code (code in bold means for comparison between codes): // create a new WMS capabilities store store = new GeoExt.data.WMSCapabilitiesStore({ url: ...
0
votes
0answers
126 views

Open a *.qgs project file in API, why maps do not show?

I'm using QGIS-2.4.0 API. I saved a test.qgs file in QGIS Desktop, in this project, there is one layer that is visible in it. Then I open the test.qgs project file in QGIS API to developing an App, ...
0
votes
0answers
46 views

Can QGIS generate a map that composed of several .shp maps?

I'm using QGIS-2.4.0 API to develop application. I need a map that composed of several vector layers. If only this, it can be done by merge in QGIS, but I need more for that: the map(or project?) I ...
0
votes
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 ...
0
votes
0answers
104 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 ...
0
votes
0answers
133 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
votes
0answers
44 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 ...
0
votes
0answers
499 views

Creating a layer switch Google Maps Api v3

I have generated a basic webpage with Visual Studio 2012 that displays a Google Map. My goal is to add multiple KML layers from my Server onto the Google Map, BUT, i want to be able to have a sort of ...
0
votes
0answers
31 views

Get Web Map Layer Field Value for If/else Statement

I've been trying to read through the ArcGIS JavaScript API but can't find what I want. I have a web map on my page that is based on my my map stored on ArcGIS online. I want to create an if/else ...
0
votes
0answers
139 views

OpenLayers Vector Features with common properties in multiple Layers

I am trying to manage features across different layers. Features are displaying weather parameters at some points on the map. Hence there is a wind layer, a temperature layer, etc. which all are ...
0
votes
0answers
33 views

Adding layers with different WKIDs to ArcGIS API for Silverlight application?

In Esri Silverlight application, how can a map layer with a different WKID than the one used in the application be added? Will Esri 's Silverlight application handle the re-projection?
0
votes
0answers
42 views

Geoserver layer rotation problem

I have a mapping system setup with PostGIS, Geoserver 2.4.1 and OpenLayers 2.12 I am trying to use the geoserver vendor specific parameter "angle" to rotate a layer, and it seems to work fine. ...
0
votes
0answers
101 views

Clipping multiple layers in QGIS 2.2

I have huge amounts of data (multiple country-wide shapefiles) which i have to work with constantly. But working on separate cases i only need a fraction of that data (region, city etc.) Loading the ...