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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72 views

Refresh Map after Invoke URL

I am making a map on Auto Desk Infrastructure Map Guide Studio. Now I created a small ASP.NET website and hosted in local machine, Now on click of different buttons in flexible layout toolbar, I ...
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253 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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63 views

group all layer index file after adding to TOC

I have added all the tif file of shape file to the map (Desktop).what i need to do group all tif file as one layer to TOC.How to do? Please help me.I am using c#.net
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146 views

Error 'Invalid geography. Antipodal edge…' with Postgis

I have a table in postgis like this CREATE TABLE locations (id int, name VARCHAR(255), pos geography(POINT, 4326)); with a couple of points. E.G. INSERT INTO locations (name, pos) VALUES ...
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399 views

How display many layers from Geoserver in one map?

1) I publish 4 layers in Geoserver (planet_osm_line, planet_osm_point, planet_osm_polygon, planet_osm_roads). 2) Then I add styles (from sld styles) to the Geoserver. 3) Then I set this styles in my ...
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99 views

How to create a Layer from a list of points in PyQgis

I`ve developed an algorithm that generated an two dimensional array with points. Each subList of this array must be displayed as an polygon on the map view, and the recently created Vectors should be ...
2
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1answer
139 views

OpenLayers: Can I drag a feature between two maps?

Is it possible to drag the features between two different maps? Now, I create feature on event mouseenter but I would like to insert the feature and at the same time start to drag this feature.
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31 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.
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97 views

Deleted layers still appear while loading project QGIS 1.8

I'm working on a project where I digitized a few maps (georeferenced) and I also added a couple of csv files. I deleted the raster and cvs layers after I included them into the project as shapefiles ...
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56 views

Change feature's image when it's not clustered

I'm clustering the features on the layer using AnimatedCluster this way: dataLayer = new OpenLayers.Layer.Vector("Data", { strategies: [ new ...
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1answer
1k views

Could not add the specified data object to the map

I have registered the postgresql database with arcgis desktop 10.1. In ArcMap, When I try to drag and drop one of the tables to the map I get this error: Could not add the specified data object to ...
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2answers
269 views

Custom filters (server side) for Openlayers Vector Layer

I have a vector layer in openlayers with source in GEOJSON (custom php server, which I have in complete control) and BBOX strategy. Vector points contain point sources which have different ...
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51 views

Is there a way to create read-only layers?

I have a project in QGIS with several views loaded from a postgis-database. Editing and creating new objects in these layers won't work (because they are views) and it would be easier if the user ...
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2answers
58 views

How to create thinner outside boundary outlines with bolder interior lines [closed]

I am working with a shapefile with a jagged coastline and interior regional boundaries. I am trying to create a thin line for the coast, so it appears more clearly, while still keeping bold, thicker ...
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1answer
94 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 ...
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1answer
87 views

Differences between Arc 10.0 and Arc 10.1 Layer files

We have a program that cannot import Layerfiles from 10.1, but instead changes them to 10.0 layer files. I'm wondering if there is any Layer functionality that is lost in this transition. Right now ...
2
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1answer
185 views

Openlayers: How to make layer come to top after choosing it in layer switcher?

I have a base layer and 3 image layers . I also have setup a layerswitcher so that user can choose which layer is to be overlayed on the base map and I have 3 sliders such that user can choose the ...
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49 views

Making a KML layer “always on”

Is there a KML tag or specification by which you can force a given layer (specifically, a screen overlay) to be "always on", in that there is no way for the user viewing the file to make that layer ...
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1answer
157 views

how to make transparent layers with Google earth layer?

with your help, i solved most of my problems, but here is another one - i guess, a smaller issue... I managed to get Google earth layer, but when I add my GPS gpx files, are all hidden under the ...
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265 views

Why does arcpy.mapping.Layer give Runtime error: CreateObject Layer invalid data source?

I want to connect an existing .lyr file to a variable defined as lyr2. lyr2 = arcpy.mapping.Layer(r"C:/Iso100Red.lyr") Although its a .lyr file I´ll get this Errorcode: Runtime error : Object: ...
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1answer
59 views

Popups on Layer (OpenLayers)

I have the following situation: i display points and point informations in popups. the points are added to a layer. The popups are added to the map, with map.addPopup function. It works great. The ...
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131 views

How to populate an asp.net text box with values rather than display them as popups

I am using Leaflet Vector Layers from here and Esri ArcGIS Server 9.3.1 and developing in the .NET Framework. I would like to send the information that displays in a popup to text boxes when the user ...
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103 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 ...
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1answer
124 views

How to sum the values for bins with the same location?

I have two maps in csv form, each has a latitude, longitude, and value column. Since not all the positions in one map are in another map, is there any way in QGIS to display a new map which only shows ...
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1answer
145 views

How to make a virtual layer from ogr geometry?

I know how to do this: nodes = driver.Open(node_nav,0) node_lyr = nodes.GetLayer() node_lyr.SetSpatialFilter(None) But how do can use the layer methods on a geometry I created from scratch? ...
2
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1answer
266 views

GeoExplorer: “Could not create layer record for layer group”

I installed GeoServer via OpenGeo Suite, and still working on it. I created a "Layer Group" and add layers from local PostGIS. I tried to preview it from "Layer Preview" and show perfectly through ...
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1answer
446 views

Creating a layer after using SelectLayerByAttribute_management

Is it possible to use an existent layer to do a selection by attributes without having to use MakeFeatureLayer_management first? Because I already have a layer with the same name as the feature class ...
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41 views

How can I import layers into a database?

According to the QGIS User Guide (release 1.8.0, page 203/204) I only have to drag a layer from the QGIS Browser to the DB Manager. But for me this does not work.
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1answer
427 views

QGIS python - reference a layer in the table of contents

I'm trying to create a plugin for QGIS using python, But need some help. I want to 1.Zoom to a layer and 2. make the layer visible(switch off or on). But I have managed to zoom to an active layer by ...
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1answer
146 views

Geoserver api: how to determine a layers respective workspace?

I am using the geoserver api to find information about layers that are available. I am using: http://localhost/geoserver/rest/layers.json to get a dynamic list of all layers. If I then select a ...
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1answer
123 views

Rendering order of layers in QGis libraries

I am using the QGis libraries in a external Qt App. When adding vector and raster layers (in any order) to the QgsMapLayerRegistry instance, it somehow sorts the layers so that the vector layers is ...
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1answer
69 views

How to copy a layer in TileMill?

I've been learning to use TileMill, and I want to be able to copy a layer. I especially want to copy layers connecting to an SQLite or PostGIS database in order to avoid having to type in multiple ...
2
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1answer
179 views

OpenLayers - How do I change the WMS URL in Code

I want to be able to change the url for a layer in code. The reasons is that I am implementing local caching. When local caching is Not enabled, we use 4 servers to deliver tiles to run parallel ...
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4answers
956 views

How to get vector data from OSM to use in QGIS?

How do I get data from OpenStreetMap which I can then edit in QGIS layer by layer? What is the best OSM output and what / how do I get to a suitable input for QGIS? OR...is there another appraach to ...
1
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1answer
106 views

QGIS Layers Not Lining Up

I am new to QGIS, I have been using ArcGIS for most of my maps. I have two layers that are not overlapping properly. One is a shp file from a GIS clearinghouse and another from a delimited text ...
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1answer
307 views

How to resolve error “Handle bad layers” in QGIS?

I'm new to QGIS and have been seeing what it can do for me – seems good. I imported shape file data from a UK Ordnance Survey data file and saved the file in a new folder. It was very good, doing all ...
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4answers
674 views

How to merge 48 separated US States layers into 1 layer, using MapInfo?

They are Census Block layers. The person on the website separated them into states so they can be download easier. I uploaded each states separate layer into MapInfo. Now I need to merge the files ...
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193 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 ...
2
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1answer
321 views

Can one convert text annotations to a layer in Qgis?

I know text annotations can be turned on & off with Ctrl+T... but is there any way to export them as a layer? Thanks!
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2answers
234 views

How to load layers from postgis to dotspatial or sharemap viewer

I want to develop a PostGIS viewer for PostgreSQL (with SQL query editor) to visualize PostGIS layers. Which spatial library (.net C# supported) do I have to use?
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2answers
1k views

How To Highlight Roads?

I wish to change the colors of various roads on a map and save the changes to either a "personal map" or a "map layer." The personal map could look something like this, except it would need to have ...
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89 views

“could not get any sources: no image returned from source WMS” error in mapproxy demo

I am trying to connect my mapserver to MapProxy. First part of the map file is shown below MAP FONTSET "fonts.lst" IMAGETYPE png MAXSIZE 4000 SIZE 800 800 EXTENT -20000000 -20000000 20000000 20000000 ...
6
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1answer
442 views

How to add layer with ArcPy and retain feature class metadata (like Credits) in layer properties?

I have multiple feature classes in a geodatabase, each feature class has metadata including a Description, Credits, and other information. If I use the 'Add Data' button in ArcMap 10.1 to add one of ...
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0answers
152 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 ...
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0answers
227 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 ...
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1answer
682 views

Marker layer not responding to events in OpenLayers

I have multiple layers in OpenLayers: three vector layers, one google map layer, and a marker layer. I registered feature selected event to all three vector layers (which works fine, but btw is that a ...
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2answers
302 views

ArcGIS 10.1: “ERROR 000223: Cannot extract event table properties” when iterating through multiple files/folder

I am trying to convert ~270k csv-files with lat/long-data to layerfiles. The files are split into folders by year, i.e. ~30 folders with ~9k csv-files in each. I have written a script to iterate ...
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3answers
404 views

What Is The Ideal Workflow To Map (British) Postcode Territories

I'm looking for the best workflow for mapping postcodes and calculated territories, but being relatively new to mapping I'm struggling on a few details and also the best practices for displaying these ...
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1answer
109 views

Openlayers Overview - disappearing layers

when I do this: var options = { autoPan : true, size : new OpenLayers.Size(300, 200), layers : this.map.layers, mapOptions : { allOverlays : true ...
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1answer
157 views

How can i select many rows from a table?

I want to create an action that select many rows from PostGIS table to show many lines in QGIS. How can i select many rows from table with python to add these rows in a layer? Thank you