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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512 views

Code works on python console in QGIS but same doesn't work in stand alone script

I'm trying map rendering with stand alone script, so I have small script which works fine in python console provided QGIS, however when I run same code in stand-alone script it executes without error, ...
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1answer
54 views

QGIS 2.4: copying of points to another point layer

in QGIS 2.4 it is not possible any more to copy points of a layer into another layer - I get the message: " Fehler: Objektschreibfehler: Objekterzeugungsfehler (OGR-Fehler: Attempt to write non-point ...
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104 views

Error Applying Symbology to Shapefiles

I'm trying to apply symbology to my dataset after it is populated to the map display, but I am getting the following error. Have I placed the ApplySymbologyFromLayer code incorrectly? Traceback ...
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1answer
48 views

Merged Layers turned into square shape cause by single layers in QGIS?

What I did is merged the 30 layers of the map (Isabela Map Province - Philippines) and below is what happened. How do i remove the inside map of the border? I'm new to QGIS and I'm using QGIS 2.4 ...
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1answer
138 views

Unable to Drag to rearrange layer drawing order in Table of Contents of ArcMap?

I'm new to working in ArcMap, but I seem to have a very small issue. I'm using ArcMap 10.2.2 on Windows 7 Ultimate and for some reason, I can't rearrange the layers I'm working with in the table of ...
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2answers
124 views

Openlayers 3 Vector Layer error

Getting error from Firebug on running this code: TypeError: f is null (ol.js 409) The map is showing up properly. After adding the line : this.map.addLayer(vectorLayer); I get the mentioned ...
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1answer
234 views

How to get wms layer's extent OpenLayers3?

Here is my a part of code , var wms = new ol.layer.Tile({ source: new ol.source.TileWMS({ url: 'localhost:8080/geoserver/BEIS_WS/wms', params: { ...
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1answer
207 views

How to query all layers in ArcMap and get access to them by name or index?

I have next issue: I have ArcMap with tons of layers. Some of these layers may contain another layers with data (aka Composite layers) or they don't. The depth of composite layers in unknown. I need ...
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0answers
32 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 ...
2
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176 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 ...
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124 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, ...
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241 views

OpenLayers 3 drag and drop interaction with custom projection problem

I am trying to add layers by using drag and drop interaction. Here is jsfiddle.http://jsfiddle.net/anuket/umdwzn10/ It almost works, I mean new layer is added, but for Geometry it gives "NaN". Geojson ...
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1answer
37 views

Is there a a way to add a topology dataset to an mxd with arcpy?

I have a script that identifies certain layers from a folder containing several geodatabases. Part of the scripts purposes, or intended purpose is to have it add a topology dataset to the dataframe. ...
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1answer
41 views

merging layers of raster data of the same format

My map consists of several different grid-layers lying right next to each other. I want to merge them to one single layer so that i can analyse my whole map at once. How can i do that?
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1answer
95 views

When does iface.mapCanvas().layers() get updated to the contents of QgsMapLayerRegistry.instance().mapLayers()?

Since the topic might be a bit cryptic, I'll try to explain where my problem is. I am currently developing a Qgis-plugin, where I am creating and adding some layers automatically, which I would like ...
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3answers
6k views

Merging Two or More Layers using ArcGIS for Desktop?

I am working with three clipped layers that are shown in the TOC. I created these layers from a large watershed shape-file. However, each clipped layer includes the layer before it and only expands on ...
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1answer
58 views

Change layer properties

How can I edit name of lines of layer in ArcMap from Visual Studio C#? E.g., change STR_NAME = "Pushkin street" to STREET = "Pushkin street"?
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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 ...
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1answer
172 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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1answer
179 views

How to transfer layer data from OpenLayers to PostGIS database or QGIS?

Supposing I have a created some layers in OpenLayers containing only Geometry Points, how do I transfer my data to a postGIS database? Is there a way to turn pure javascript/openlayers to a table in ...
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1answer
102 views

Switch callout text boxes on and off?

In my ArcMap project I’ve added text to the map in callout boxes to identify certain districts. Is it possible switch these on and off like the data layers? I don't want them to show in everything I ...
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0answers
63 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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1answer
57 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
83 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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1answer
136 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: ...
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1answer
86 views

Disappearing layers in ArcScene

This is very frustrating! I have DEM hillshade layers which I have tried to change the base heights to floating surfaces. I have done this with these layers before (!) but had to change them back and ...
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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 ...
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102 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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1answer
45 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
35 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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0answers
162 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 ...
3
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0answers
139 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
31 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
65 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 ...
6
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1answer
204 views

Can I save an ArcGIS GeoPDF with all layers turned off, which can then be turned on individually in a pdf viewer?

I am working on an mxd that has many individual point layers (displaying species locations). To make life easy for my stakeholders, I'd like to export to a GeoPdf so that all of these point layers are ...
3
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1answer
61 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
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2answers
2k views

How to clip a layer file

I have a world imagery layer that I want to clip to a single county. I would just save as a JPEG and edit using other software, but this uses a lot of processing power if I want a high resolution. I ...
2
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1answer
74 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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1answer
65 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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1answer
61 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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0answers
53 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 ...
2
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1answer
158 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 ...
3
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2answers
497 views

How to fix link between layer and shapefile in ArcGIS 10?

Does anybody know how to fix a link between shape file and layer file in ArcGIS 10? Every time I add layer file, there is a small exclamation mark next to icon and I have to define a source (path to ...
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1answer
131 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 ...
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0answers
101 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 ...
2
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0answers
20 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
79 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: ...
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1answer
113 views

Mouse click event used gis application with much data

I will create an application that using my water pipes, electric cables, gas pipes service in a city. All of streets and roads including water pipes. My service is publishing pipes. My service like ...
4
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2answers
152 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.
2
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1answer
94 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. ...