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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1answer
24 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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0answers
25 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
61 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
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votes
0answers
22 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,
...
1
vote
1answer
52 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
52 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 ...
0
votes
1answer
50 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
50 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
1answer
56 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 ...
1
vote
0answers
57 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 ...
2
votes
1answer
40 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
0answers
39 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
101 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 ...
1
vote
1answer
19 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 ...
0
votes
1answer
58 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 ...
