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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355 views

OpenLayers: WMS layer above select-controlled vector layer?

Is it possible to display an image layer (WMS or Image) above a vector layer with activated SelectFeature control in OpenLayers? The image layer (radar returns) contains only sparse, semi-transparent ...
2
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1answer
201 views

How to replace the legacy function “doQueries ” to AMD ESRI Javascript format?

I'm trying to understand the migration of ESRI API for javascript, from legacy to AMD. In the case of this example, how replace the fucntion doqueries????: function init() { map = new ...
3
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1answer
510 views

Layer map plots on top of one another in R/ggplot2

I'm making a choropleth map in R/ggplot2. I have the colored part working just fine. This code p <- ggplot() + geom_map(data=c_1860, aes(map_id = GISJOIN, fill = AHL002), ...
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0answers
36 views

How to search for layers in the layers panel?

I have QGIS projects with a lot of layers. Sometime it's difficult to find a layer into Layers Panel. How to search it?
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1answer
303 views

Arcgis SDK for Android - Query multiple feature layers

I'm developing a android application with arcgis sdk. I have a basemap and then 4 different feature layers on top of it. I began with the arcgis sample "attribute editor" and removed the edit ...
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0answers
107 views

Add Layer into existing GroupLayer in map c#

I can't add Layer into existing GroupLayer in map. I'm trying this code below, but it does not work! I need code looks like this: public void AddLayer(AxMapControl mapControl, ILayer pLayer) { ...
2
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1answer
309 views

ArcGIS 10.0 get sde information out of .mxd

The overall goal here is to iterate through several directories of .mxd files and document which SQL Server instance of SDE they are pointing to, with the database name and feature class names. All ...
4
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1answer
60 views

QGIS 2 bold Layer names?

I am currently working with QGIS 2.0 in an Ubuntu environment. I have a quite large project with many different layers and layer-groups. By default the layernames are in bold fonts and the groups are ...
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1answer
203 views

How to set style in the database (QGIS)

Is it possible to set style layers in the database? (QGIS) [MySQL database] I would like to set and share my style to other users when they open the layer it's still as my style. Thank you
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2answers
74 views

Error adding a delimited text layer

Im working with QGIS 1.8.0 and I have been trying to upload a delimited text layer but keep getting the following error : The layer ...
2
votes
1answer
129 views

Unable to change the layer unit in QGIS

I have been working with QGIS for 2 weeks and I got the hang of it now. The problem now is I cannot calculate the area of a created polygon. Because the layer unit is not changing to meters. When ...
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1answer
36 views

Last moment a layer in Geoserver was viewed

My company publishes >1,000 layers using several geoservers. We are publishing them on several different websites. Because there are so many layers, it is impossible for us to know which layer is ...
2
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1answer
380 views

Openlayers custom (local) OSM tiles layer with limited extent

I know, how to add an overlay layer by specifying my own URL. But what if the overlay layer extent is not as large as base layer - e.g. overlay layer is only avaliable for one country and not for the ...
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1answer
75 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 ...
3
votes
1answer
275 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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0answers
65 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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1answer
153 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 ...
3
votes
2answers
431 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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0answers
102 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
votes
1answer
142 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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0answers
32 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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1answer
100 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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0answers
65 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
290 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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0answers
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
60 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
96 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
90 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
193 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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0answers
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 ...
0
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1answer
170 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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1answer
280 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
60 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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0answers
104 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
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1answer
130 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 ...
1
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1answer
148 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
votes
1answer
280 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
459 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 ...
0
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0answers
42 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.
1
vote
1answer
465 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 ...
1
vote
1answer
154 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 ...
1
vote
1answer
131 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 ...
1
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1answer
72 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
votes
1answer
183 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 ...
4
votes
4answers
1k 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
vote
1answer
109 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 ...
0
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1answer
325 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 ...
0
votes
4answers
737 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 ...
1
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0answers
200 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 ...