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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Filter geoJSON layer after it has been loaded

I'm declaring and defining a geoJSON layer first, like: var layer1 = L.geoJson(null, { onEachFeature: function(feature, layer) { ... } }); ..and then loading a CSV into it, like: ...
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59 views

QGIS python originalName() does not return actual original layer name

I am writing a Python QGIS Plugin, using QGIS version 2.6 as the basis for development. When loading data into the canvas programmatically, I am trying to maintain the spatialite table name as the ...
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42 views

What is corrupting my layer file?

I'm trying to save layer files from a colleague's mxd. As usual I right clicked on the layer and saved as layer file. Simple - but no - the layer files can't be opened. I get this message "Adding ...
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1answer
35 views

.net arcobjects retrieve user value from layer data source

I have a need to get the user value from a layer properties. The value is from: Layer Properties -> Source -> user in Data Source (sorry not enough score to attach the picture). I tried to check ...
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1answer
35 views

How do i match Layers in QGIS

am trying to create a map, which shall show NRW ( a part of Germany) with some extra gimmiks. Those Gimmiks are Coordinate based locations of several Manufacturers. Later on i want to adjust the ...
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1answer
60 views

Single WMS from single mapfile with several rasters in MapServer

I have several rasters in a single mapfile, I put them as layers like here: LAYER NAME "Layer 1" GROUP "All Layers" TYPE RASTER STATUS ON ...
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2answers
447 views

How do I reach a layer inside a GroupLayer?

I am having problems in ArcObjects. I am struggling to get to the individual (feature-)layers inside a GroupLayer. Does anyone know how to do that ?
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2answers
87 views

definition query with 3 plus variables to loop with python and save layer files

I have a script that takes an input feature class and uses a field within this class to create a definition query for each unique field. A question on how to do this is listed below saving layers for ...
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1answer
30 views

Postgis spatial query st_disjoint

I have 2 layers that I want to compare. I wish to retrieve the features in the layer 1 that have no part in common with the features in the layer 2. I try queries like that but do not returns me the ...
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21 views

Finding how many points are in polygon of layer in specific time using QGIS?

I have the layer that I created with the number of earthquakes in each region in the last 400 years. I want to know the number of earthquakes that occurred in one specific region prior to 1900. How ...
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1answer
28 views

Render or display only the boundary of a vector layer containing thousands of polygons

This might be a very basic question but my lack of experience makes it really hard to answer. To have a cleaner map to print I want to display only the boundary of a layer composed of more than ...
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34 views

C++ QGIS Conditional Label Colouring

I am using QGIS and C++. When I create a layer of polygons with labels in the center I am able to use a RuleBasedRenderer to control the background colour of the polygon. How do I similarly control ...
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2answers
39 views

How to convert KML file to layer , on an alrady existing map in arcgis

I have a map in arcGIS, and i want some kml data to be shown over that map. But if i convert kml to layer, the data is not visible on that map. Both the layers can be seen separately by "zoom to ...
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1answer
68 views

“No data available” on hover

I have the following map: https://aressk.cartodb.com/viz/408dd3ea-deea-11e4-9d17-0e9d821ea90d/embed_map It has two layers. On the Waypoints layer, I have Hover turned on for the Info Window. On the ...
2
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1answer
45 views

QGIS TimeManager with multiple features at one time?

Since the data I have to deal with is really large, it is not practical to separate every feature into one line in the CSV file. Is there any way to animate them as a whole layer? I have ...
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1answer
43 views

Copying the visual shapes from another layer to the current one, while keeping the current layers' database

There are 2 layers that have similar shapes but small differences. I want to keep the shape of layer 1 while having the data of layer 2, which includes more data and it will be animated using ...
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1answer
51 views

Pass coordinates parameters to geoserver pgrouting service from Leaflet wms tile layer

I've configurated a pgRouting service in Geoserver, following the steps on the documentation it's easy to accomplish. Reading the documentation, existing examples, etc.. I've come to undestand how ...
1
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1answer
55 views

set the transparency layer group with Python

How can I set the transparency for all layers within a group of layers? I assume this will require the use of a FOR loop in the Python Console. Based on How to set the transparency for multiple ...
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0answers
53 views

QGIS - Pop-up menu not displayed when right click on a layer in layer tree view

I'm developing a custom QGIS application using the QGIS API. I've been using the API provided with QGIS Brighton (Version 2.6.1) and have been developing the application in Python in a Windows 7 ...
2
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1answer
47 views

PyQGIS: How to get the list of valid layers in TOC?

To get the list of TOC layer names I used the approach suggested here: for layer in QgsMapLayerRegistry.instance().mapLayers().values(): print layer.name() But this method is not reliable due ...
2
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1answer
59 views

How to display map tips only for one layer?

I'm relatively new to QGIS. I added the hover labels to my map using the Map Tips. My issue is that it makes hover labels for EVERY layer on my map. I only want it to make labels for one layer. Is ...
2
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0answers
39 views

How to make a model with more than 2 input layers for buffering and merging?

Would it be possible to add more inputs to Buffer and Merge? From what I can see there is a limit of two input layers per both. As far as I know this is possible in ArcGIS's Model Builder but from the ...
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1answer
46 views

Adding point layer in QGIS from SQL Server failing

I just downloaded QGIS a few days ago (version 2.8.2-Wien) but I am not able to get it to work as I thought it would. I tried pulling in spatial data from sql server (a "geometry" column containing ...
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35 views

GDAL Create Layer WFS

So I'm trying to write a program that has the ability to read and write data from a WFS (Web Feature Service) I've managed to pull all the data I want from the WFS. Now I'm trying to write to it and ...
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1answer
53 views

ArcObjects WPF Select layer in legend

Can I select a layer, by code, in the TOC/legend of a map in a WPF ArcGIS Runtime application? I develope in ArcGIS Runtime SDK 10.2.2 for .Net in C#.
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1answer
47 views

Replacing layer ArcSDE connection

I am very new to using Python... I have an MXD with all of my layer files in it. They are grouped by category etc. Each layer file references a dataset within my SDE. My SDE has two different ...
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1answer
57 views

Can you have layer control in Odyssey.js?

I've been playing around with odyssey.js and made a few map stories with it: http://www.burdgis.com/blog/archive/map-stories/ What I can't work out is how to toggle layers. I imagine you would need ...
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2answers
147 views

How to create multiple QGIS layers from multiple text files?

I have a few hundred txt files (each representing a line of a river bed profile) that I need to load as (point-) layers in QGIS. Partial example: 4504764.8331;5374251.3024;397.8871;2 ...
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19 views

Placing a WMS layer above a WFS layer makes WFS layer not selectable

I have two different layers which I call from Geoserver. The first one is a WMS layer with points and the second one is WFS layer with lines. I need to display the points above the lines and I also ...
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3answers
3k views

Z-index in OpenLayers 3: layer ordering in OL3

Is there a method to cjange Z-indexes of layers in OpenLayers3 like it was in old version? map.setLayerIndex(markers, 99); //set the marker layer to an arbitrarily high layer index and I need to ...
5
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1answer
513 views

what dictates the drawing order of overlapping features with in the same layer/feature class in ArcGIS?

I know that in ArcGIS drawing order is controlled by layers, and if I want to make some features be drawn on top of other features I can use definition queries to separate them into different layers ...
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1answer
46 views

Failing to use ArcGIS map as basemap in GeoNode

I'm trying to add the ArcGIS map service to my project in GeoNode but I'm failing to do so. I've read around and I saw information that says I need to make a XYZ tile service (something like this: ...
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1answer
305 views

Can I save an ArcGIS geospatial PDF with 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 geospatial pdf so that all of these point ...
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1answer
52 views

Repairing a broken data source for a single layer in multiple map documents

I am a Python newbie and I'm trying to repair the data source for an aerial raster in close to 50 individual map documents. My supervisor deleted the 2014 recently and uploaded the 2015 in its ...
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19 views

Display InfoTemplate based upon Visible Layers

I am relatively new to JavaScript and ArcGIS Implementation, so if I'm missing an overarching understanding please feel free to call me out on that... I have a MapServer that I connect to that has ...
2
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3answers
55 views

Saving extent of satellite imagery in ArcGIS Desktop?

I'm using 50cm imagery for the whole country of South Africa, which make zooming and panning painfully slow. Can I save imagery for just the area I am working with (ie. data frame, city, province)? ...
1
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1answer
182 views

What ArcGIS Online feature service provides 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 service so that I can use the UniqueValueRenderer to make the ...
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0answers
46 views

Adding shapefile from local drive to WebApp using ArcGIS API for JavaScript?

I want to add a shapefile of certain data to my WebPortal (which is currently running on Localhost) how can I do it? I'm using ArcGIS API for JavaScript.
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1answer
127 views

Should I use Basemaps or Layers to overlay two maps?

I'm trying to create a map that essentially has two maps on top of each other (chosen from many map choices) at the same time. One of maps will have an opacity slider. Should I be trying to use two ...
0
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1answer
49 views

.mdb is not a valid layer and can not be added to the map

I know this question has been asked quite a few times before but I couldn't find an answer that suited my situation at all. So this is what happens. Currently, I am using ArcGIS to map the sewer ...
0
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1answer
42 views

Use Multiple Symbology on single layer [duplicate]

Task: Display multiple symbologies (Gratuated symbols and Colours) on one layer Problem: The symbology keeps overwriting itself, so I cannot get both symbologies at the same time Methods Tried: ...
0
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1answer
80 views

Cartodb Toggle Layer help

I am working on a map that i'd like to toggle 1 layer off/on. I followed this http://academy.cartodb.com/courses/03-cartodbjs-ground-up/lesson-2.html tutorial and it worked fine(w/ their data) and i ...
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0answers
15 views

Identify task to multiple tiled layers

I have a map consisted of many tiled layers that show points. How can i perform an identify task to the visible tiled layer. Be aware it is tiled layers not dynamic. Any suugestions?
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1answer
38 views

Load multiple layers into multiple maps - python

import arcpy import arcpy.mapping import os import sys from arcpy import env #import string env.workspace = r"G:\GIS" mxds = arcpy.ListFiles("*.mxd") lyrs = arcpy.ListFiles("*.lyr") for maps in ...
0
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1answer
107 views

Am I thinking about layers all wrong?

I work for a non-profit health organization and I am currently testing out some GIS software to basically see what usefulness it might serve. My skill set with this software is pretty elementary, but ...
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2answers
110 views

Points on Map overlapping/covering city and town names

I have a map with many points, these points map incidences of landmine accidents in Colombia. There are thousands of points and cover up parts of city and town names, in some cases the entire lables ...
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1answer
103 views

Python script to summarize layer properties

I recently found this layer properties script that summarizes layer properties in a single file or a directory and all subdirectories: ...
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52 views

Opacity Slider not creating consistently

I am dynamically creating some Opacity Sliders for some layers I have added to my map. The issue is that for some reason after it creates 7 of the sliders it doesn't create the rest correctly. I have ...
0
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1answer
73 views

extend extent of geoJSON layer - Leaflet

I am zooming to the extent of a set of geoJSONs collected in a FeatureGroup with this call: map.fitBounds(myFeatureGroup.getBounds()); ...I would like to extend the extent a bit; as it is the ...
1
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0answers
38 views

Set Layer Scale Range Still Draws When Layer is Grayed Out In TOC? ArcGIS 10.2

I have a layer which I have set the visible 'Scale Range' to don't show layer when zoomed out beyond: 1:18,489,298 and in beyond 1:9,244,6249. (I am using ArcgGIS Online/Bing Maps/Google Maps ...