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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0answers
84 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 ...
0
votes
1answer
19 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 ...
1
vote
2answers
51 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 ...
3
votes
2answers
91 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 ...
1
vote
1answer
62 views
How can I change SQL query through a layer of an action (python)?
I have three layers from three diferent database tables.
When I click in other layer I want to change (with an action) the query of that three layers.
How can I do that?
Thank you
0
votes
1answer
547 views
Adding time enabled layers to ArcGIS online
I am trying to add time enabled layers into ArcGIS online. The information in the ArcGIS resource center makes it sound like it is possible to add time enabled layers from ArcMap to ArcGIS online. I ...
0
votes
1answer
63 views
How can I set the base layer of map before initialization?
I have been using map.setBaseLayer(layer); to switch to my preferred map layer, using the localStorage variable layer that is stored in my web browser, upon initialization of the map. But I realize ...
1
vote
1answer
119 views
How do I add my own map layers to Leaflet
I have a Leaflet map and want to add two of my own small polygon layers (currently in shapefile format, but they could be converted to GeoJSON). Can this be done without a mapserver to publish them ...
5
votes
1answer
80 views
Load third-party APIs only when the corresponding map layer is requested?
OpenLayers allows multiple map layers to be hosted on a common platform. If the map application supports a wide variety of maps, say from Google, Yahoo and Microsoft, I find that upon initialization, ...
2
votes
1answer
1k views
XYZ Layer in Open Layers has Missing Tiles
In Open Layers I'm having a missing tile problem where it generates a missing link icon and a pink background. I found several threads including this one saying to add this code
...
1
vote
1answer
30 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
...
0
votes
1answer
63 views
How do I style lines to show gradient colors for two attributes?
I have a layer with the city streets. I have a database with traffic values, including traffic going into the city and traffic going out from the city.
I need to show the street links with different ...
5
votes
1answer
345 views
MXD Performance - number of layers vs number of datasets
My mxd currently has 5 buildings layers accessing 5 different buildings datasets (one for each of 5 counties). Most often there would only be a single county's buildings in the current view, if that ...
0
votes
0answers
27 views
Geoserver 2.3.0 exclamation mark on Layer
if i want to publish a Layer from Oracle Locator this becomes a yellow exclamation mark and so i can´t see in the layer preview. I use before geoserver 2.1.4 and it worked perfect.
I have attempt to ...
0
votes
1answer
65 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
0
votes
0answers
27 views
Create Layer including drawing objects
I draw some polylines on map. How create new layer with this features?
Map and Polylines must be in different layers.
public void DrawPolylineUsingInputGeometry(IActiveView activeView,
...
0
votes
1answer
64 views
In QGIS can I show just the lines in a Postgis query? How can I do that?
I have three tables in Postgresql, each table with one layer of lines.
I want to show the path of an initial line to another final. Is it possible executing a SQL query?
Thanks
My three tables are ...
3
votes
1answer
54 views
Performing a field calculation affects selectable layers in ArcGIS 10.1
In ArcMap 10.1 I have a table open for a layer that I have set as not selectable. Yet when I use the Field Calculator for a record(s) in that table, it automatically makes the associated layer a ...
1
vote
0answers
60 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
1answer
58 views
Join attributes by date in Qgis
I learned (thanks!) to use the join feature built into the layer properties, but in my case it doesn't work because data do not match perfectly. Infact shape refers to geotagged photos, csv is a log ...
2
votes
1answer
44 views
Using multiple LayerIDs in a Legend
This should be simple, but I cannot find any documentation on how to do it. I have a legend that is bound to my map that contains several layers. I do not want all of the layers to appear on my Legend ...
1
vote
2answers
1k views
Some Help to select some features from a vector layer
I have a vector layer (kml) that has some point with scientific name of plants and animals, some description of the place where the people saw them and the coordinates.
Basically the table associated ...
1
vote
0answers
40 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
1answer
22 views
geoserver returns incorrect number of points when cql used
I'm using Geoserver 2.2.4 to support WMS queries. All testing is done via the "Layer Preview" page.
If I send a request with no CQL a map full of points is returned as expected.
If I add a CQL ...
2
votes
2answers
156 views
Managing a large number of layers in OpenLayers/GeoExt and Geoserver
I am building a web application to facilitate the handling of approximately 2500+ historic maps. I think it would be too difficult for our users to search for specific maps in an ordinary layer tree.
...
2
votes
3answers
2k views
How to get the layer name?
I am using OpenLayers, Geoserver 2.1 CQL language. The problem is that I do not know how to address the layer. I am trying to call a function like this:
var createWmsLayer = function(name, url, ...
0
votes
1answer
73 views
Split Map using Python in Qgis
I have a map, in which each region is defined as an attribute of the map (I can select each region from the attribute table). I am trying to create new layers each one containing only 1 region using ...
0
votes
1answer
65 views
Feature Layer Selections
I'm new to arcgis and arcpy, so some of my lingo and terminology may be off. I have a script that takes a feature layer as an ainput. From there I want to be able to count the number of selections in ...
2
votes
2answers
123 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 ...
1
vote
1answer
55 views
What ArcGIS Online feature layer can I use to display European states with unique country codes?
I'm writing a web page to display ECB statistics on an ArcGIS JavaScript API-based web map.
I'm a bit lost when selecting a feature layer so that I can use the UniqueValueRenderer to make the states ...
1
vote
1answer
157 views
How to manage user privilege on layers to Arcgis 10 Desktop?
Problem:
I am a Computer Analyst on a town hall.
Here we have the sector A and B. Both work in ArcGIS 10 Desktop.
The sector A has granted to access/edit everything. The sector A has all the ...
0
votes
1answer
42 views
How can I create a button to add a POI layer?
I am making a map of a city with openlayers. I have the shapefile data of the POI (hospital,bank,school etc.) I want to add the layers with buttons not in layerswitcher. Like whereis.com's quick ...
0
votes
0answers
102 views
Get feature from two overlapping KML layers doesn't work
I did an implementation similar to http://openlayers.org/dev/examples/sundials.html
The difference is that I have two or more kml layers at the same location and want to show their information ...
2
votes
1answer
129 views
How to realign (PostGIS) layers in QGIS?
I'm trying to realign layers in QGIS. As you can see here, the "background" light-blue layer is not aligned with the top layers. I'm working with pgAdmin III and importing PostGIS Layers in QGIS. My ...
3
votes
2answers
407 views
Create multiple vector layers by reading a GeoJSON file once in OpenLayers
I am a begginner to OpenLayers, and my question is about making things more efficient.
My work is about displaying time-dependent weather elements on several point locations on the map. All these ...
5
votes
1answer
359 views
Export each layer in map to a separate image
I have a mxd file with multiple layers I have to export to PNG/JPG. I would like to create a script which turns on layers one at the time before they are exported. So far I have come up with the ...
2
votes
1answer
78 views
Keeping a vector layer always on top
I want to know how to keep a layer always on top of other layers! After adding a vector layer ( QgisInterface->addVectorLayer ), I want that layer to always be displayed on top of layers added later. ...
3
votes
3answers
162 views
Why does the layer list context menu not open anymore?
I cannot access layers properties (i.e. change color, filter by query, anything).
The mouse right click doesn't do anything.
Is there a way restoring qgis to default?
Ubuntu 12.04, QGIS 1.8
2
votes
0answers
202 views
Layer visibility using maxscale minscale not working
I'm using Openlayer and Geoserver.
I have a series of layers that have a scale parameter like: 1:50000-1:25000 where 50000 is the max scale while 25000 is the minscale.
I have a map like in this ...
2
votes
2answers
673 views
Why am I unable to publish a postgis layer to geoserver?
I left arcgis and microsoft sql and now I am trying to connect Qgis+PostgreSQL (PostGIS) + GeoServer.
I've brought my postgis database to the server, created a "store". And now I'm trying to publish ...
5
votes
1answer
224 views
QGIS or Postgis - How to split polylines with a point layer?
In QGIS, I would like to split the polylines in a layer loaded in the workspace with the points in another loaded layer. If a point intersects a polyline, this polyline should be transformed into two ...
0
votes
0answers
60 views
How can I display remotely the Panoramio's KML layers
I'm trying to display in my web portal the Panoramio's kml layer. The above code developen in OpenLayers is what I'm doing:
mapa = new OpenLayers.Layer.Vector("Panoramio Photos", {
projection: ...
0
votes
1answer
113 views
MapBox import from TileMill gives only 1 layer
This is my first time using MapBox and I'm trying to import a map from TileMill.
The map has 11 layers, in TileMill, but when I import it directly to MapBox, it only seems to have a single layer.
It ...
2
votes
1answer
62 views
definition query and mosaic dataset from gdb ArcMap 10.1 SP1
I have a Python AddIn Combobox to select a value from the drop-down list. This value changes the definition query of the layers in mxd. This works fine for "normal" feature classes, not for a mosaic ...
2
votes
1answer
145 views
How to use arcpy.mapping to batch export layer to KML?
I am trying to export map layers from an MXD to KML using arcpy with the following code:
import arcpy, os, sys, traceback
arcpy.env.overwriteOutput = True
mxd = ...
2
votes
1answer
125 views
Special background layer not coloring in Kartograph map
I'm testing out Kartograph according to the documentation and a linked gist.
Both my US and non-US layers color correctly, but I can not get the special "sea" layer to fill. I found an example here ...
2
votes
1answer
443 views
How to set up a layer control using Leaflet?
I have been working on a mapping application using Leaflet. I am using a WMS on Geoserver to get my layers, which are overlaid on a cloudmade basemap.
I tried to use the layer control on my map by ...
2
votes
0answers
40 views
What is the best way to manage dependencies between layers?
I have multiple layers that has dependency with each other.
Such as: City; Courts; Lots; Front Lot; Buildings.
The polygon's "block" depends on the polygon's "City." Example dependency: Buildings-> ...
1
vote
1answer
266 views
Openlayers Vector Feature Popup
im trying to create a popup in Openlayers that would open when someone clicks a marker. And the marker is setup like this: new OpenLayers.Feature.Vector() and not with the ordinary marker layer.
The ...
1
vote
1answer
149 views
How to select features from different WFS layers?
I'm trying to select features from different WFS layers but unfortunatelly it doesn't works in my code.
This is my code:
var select = new OpenLayers.Layer.Vector("Selection", {styleMap: new ...
