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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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 ...
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31 views

Point and Polygon Data refusing to display: corrupt data?

I have two sets of shapefiles, one point data and one polygon data. Both were sent as part of a bigger set of data. Neither the point or polygon data will display when loaded into QGIS. The raw data ...
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69 views

QGIS KML layer won't show up in Google Maps API

I've trimmed US Census shapefile data to show census blocks in just three states, by editing the attribute table. I then color coded the states based on values in the table by changing the style in ...
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25 views

How does qgis render vector layer on screen ? How can I do the same in a mobile device

Can you please tell me how does qgis software render the vector layers on the screen. I have a geojson file and I need to map its contents on the screen just like qgis does but without using base map ...
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59 views

About performance of qgis with big layer or a lot of layer

does anyone has a feedback on the performance of a big layer by exemple : I have a layer with 100 features, each feature contains specifics attributes with dynamic data, the data change each second ...
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121 views

Qgis delimited text layer from an excel file converted to .csv

I'm trying to add a delimited text layer using coordinates. The file has been created in excel and then converted to a csv file in the saving. When I put it into Qgis it doesn't recognise the ...
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79 views

How to show two layers at the same time in Qgis

I have a question about Qgis layers. I want to see two layers at the same times. one is lines which are boundary lines and the other is polygon which are district. when i was surfing about this ...
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32 views

How to SetVisible a layer without redraw all the mapcanvas

I am working with QGis 2.8.2 API c++/ QT 4.5 I am displaying a lot of layer in a mapcanvas, I am looking for a method like setVisible(boolean ) in order to setvisible or not a specify layer ...
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121 views

What could be making QGIS 2.10 crash when loading a project file?

On QGIS 2.10, running on Ubuntu 15.04 Linux, I have a project file that has a fairly large number of mainly shapefile layers, which gets to 99% on the slider to the right of where it has a message ...
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70 views

PyQGIS Set Extent for loaded layers - Refresh problem

I've written a plugin which loads a number of map layers (based on constraints) and I would then like to set the canvas extent to a selection of them. Code very similar to that below works perfectly, ...
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37 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 ...
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58 views

Make “qgis:delaunaytriangulation” and “qgis:dissolve” save their outputs on a specific predefined layer

I'm new to python and QGIS. I'm working on modifying a plugin which runs algorithms "qgis:delaunaytriangulation" and "qgis:dissolve" like so delone_triangles = ...
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36 views

ArcMap data links redirecting to location of exported map

This issue had only started in recent days. Just wondering if anyone else has come across this before and might know of a solution? I have multiple mxds that contain layers that normally live in a ...
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66 views

Getfeatureinfo is not working with geoserver point line sources

I'm not able to get information with Getfeatureinfo when clicking on point & line layers. For polygons it works fine. I'm using the code below to execute the WMS service: google.maps.event ...
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31 views

Updating basemap and layers at same time using ArcGIS Runtime SDK for .NET?

i'm working with ArcGIS Runtime SDK for .NET 10.2.5, my app has different graphiclayers with objects that are continuously moving around the map (new position data is provided fastly), the problem ...
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20 views

Toggle layers on print composition

I want to use QGIS to make several views of bold colors for one same map. I've been using the layers in order to keep one on top of another. How could i make a composition on the print composition ...
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309 views

Filter geoJSON layer after it has been loaded

I'm declaring and defining a geoJSON layer first, like: var layer1 = L.geoJson(null, { onEachFeature: function(feature, layer) { ... } }); ..and then loading a CSV into it, like: ...
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72 views

Making feature layer selectable in ArcObjects Java without getting AutomationException 0x80004005?

I am currently making a FeatureLayer from a resultset. The feature layer seems to work properly and will display on the map. However when I choose "select all" on my feature layer I get the ...
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97 views

QGIS python originalName() does not return actual original layer name

I am writing a Python QGIS Plugin, using QGIS version 2.6 as the basis for development. When loading data into the canvas programmatically, I am trying to maintain the spatialite table name as the ...
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49 views

C++ QGIS Conditional Label Colouring

I am using QGIS and C++. When I create a layer of polygons with labels in the center I am able to use a RuleBasedRenderer to control the background colour of the polygon. How do I similarly control ...
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148 views

QGIS - Pop-up menu not displayed when right click on a layer in layer tree view

I'm developing a custom QGIS application using the QGIS API. I've been using the API provided with QGIS Brighton (Version 2.6.1) and have been developing the application in Python in a Windows 7 ...
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67 views

Set Layer Scale Range Still Draws When Layer is Grayed Out In TOC? ArcGIS 10.2

I have a layer which I have set the visible 'Scale Range' to don't show layer when zoomed out beyond: 1:18,489,298 and in beyond 1:9,244,6249. (I am using ArcgGIS Online/Bing Maps/Google Maps ...
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56 views

Update shapefile name with layer name

I had a layer that I split by fields. The resulting files were given a name. I updated the names of the resulting layers in QGIS but have realized that the shapefiles have not been updated ...
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66 views

Polygon Visualization problem on ArcGIS Online?

Has anyone encountered Visualization problem when uploading shp (zip) file on ArcGIS Online? The polygons are all displaced and overlapped with each other! I am sharing the link with the layer of ...
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51 views

Generate layers based on feature values

First of all, I am very new to the GIS world, so bear with me if the question is stupid. I am using ArcGIS and here's what I try to accomplish: I have a feature class (let's call it Areas) storing ...
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70 views

Adding layer to MXD from different SDE slows down ArcPy script

My python script looks at layers in an MXD, then does a couple of clip and measure operations and generates a PDF. It works accurately and quickly (0.5-3 seconds) when all the layers in the MXD are ...
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43 views

Adjust Geoserver home page just to WMS service

I want adjust my first Geoserver home page(Before logging in) just to WMS service! Can anybody help me please?? Thanks.
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75 views

Setting KMZ layer visibility

How do I set the visibility scale for a line KMZ created from ArcMap (Layer-to-KMZ). I'm sure I would have to go into the KML code and add, but add what. That is to say as I zoom in and out using ...
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29 views

How to add on click information on places in any layers in OpenGeo Suit 4.5?

I recently installed OpenGeoSuite 4.5 and I am very new in to it. I uploaded my .shp file in it and it showing that layer currently. Now I want to add some information(name and a little info etc) of ...
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171 views

Geocoding Result layer does not show up in ArcMap?

http://i.imgur.com/XF5iQN4.png Everything was going fine until I geocoded the addresses. The addresses were all matched, but the Geocoding Result layer wouldn't show itself on the map. There should ...
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83 views

GIS system for displaying GDSII(*.gds) format?

I want to display vector graphics on raster graphics and I have vector scheme in GDSII format. There are some viewers for GDSII like KLayout for example, but they don't support raster graphics. Is ...
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109 views

My layers are not visible after restart geoserver

I have ArcSDE connection on Geoserver. In order to make geoserver faster I have restarted it. After restarting my published layers (datas) are not visible. When I publish this layer again, geoserver ...
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200 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 ...
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51 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 ...
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376 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 ...
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113 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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59 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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221 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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346 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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47 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 ...
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93 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 ...
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21 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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140 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 ...
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46 views

Lining up three Layers that use same Coordinate Reference System (CRS) in QGIS?

How do you make all borders of a layer equal? they should be equal but i don't know how, mCRS layer is all in philippine zone 5(EPSG:3125), with the same formula/equation, I'm new to QGIS and I'm ...
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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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414 views

How to force geometry type in (WFS) layer in QGIS

I have an external WFS source serving mixed geometry types - in other words, I have no control of the source. When adding the layer QGIS sets the geometry type to line and thus I am unable to style ...
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17 views

TileMill-style based on the country the objects belong to

Is it possible to have different TileMill stylings in different countries? I need for instance different colours for highways based on the country the highway is in. Is there a best practice solution ...
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26 views

Many layers from a unique KML files ? (OpenLayers)

I have a KML file generated from a server that contains many networks. I want to know if is it possible to generate one layer for each network from this single KML file ? Thank you!
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116 views

Arcscene export issue: only upper layer showing up

I have created a 3d visualization with ArcScene 10.1. I have 1 hillshade of a portion of an area, which take elevation ifno from DEM of the same area. Also, the DEM is coloured and overlayed onto the ...
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89 views

Alternative satellite and hybrid layers for Europe published on WMS

For an application I am building I require to show satellite (high resolution) and street view layers, preferably also a hybrid view. Unfortunately, due to the application not running on a typical ...