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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198 views

Openlayers event cluster feature id does not appear on layer vector feature id list

My application's objective is to click on a cluster and produce a popup with a list of all placemarks clustered there where every entry is a hyperlink that closes current popup and opens a new ...
2
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1answer
40 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
149 views

Ordering Cartodb torque visualization over Google Maps heatmap layer

I am attempting to create a map with two layers: a CartoDB Torque visualization on top and a Google heatmap layer underneath. So far I have only been able to get them to draw in the opposite order ...
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1answer
39 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 ...
3
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2answers
114 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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18 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 ...
7
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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 ...
4
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1answer
377 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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34 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: ...
6
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1answer
253 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
30 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 ...
2
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1answer
283 views

OpenLayers - cannot set layer opacity

I have the following problem: by default, you can simply change the opacity of layer by writing for example: layer.setOpacity(0.3); But when I add it to my map SelectFeature controls, my layer is ...
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15 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
votes
3answers
51 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)? ...
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1answer
176 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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38 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
72 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 ...
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1answer
38 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 ...
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1answer
32 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: ...
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1answer
46 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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11 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
25 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 ...
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1answer
100 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
79 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
89 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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35 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
33 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 ...
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0answers
36 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 ...
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1answer
41 views

Can KML layer order be set in the CMV

I just started exploring the CMV about a week ago as an option to replace our Flex Viewer based configurable web mapping applications. So far it seems to be meeting all our needs however I have run ...
6
votes
2answers
1k views

How to copy a group of layers between QGIS projects?

In ArcGIS I am used to being able to have a couple of MXD documents open and copy-paste groups of layers from one MXD's table of contents to another. This can save a LOT of time ensuring consistent ...
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0answers
78 views

Geoprocessing Ungroups Layers in ArcGIS 10.1

Is there a fix for this, am I only imagining this, or is it a bug: ArcMAP 10.1 for Desktop Build 3035 on a 64 bit Windows 7 system When I run a geoprocessing task that modifies the input data (such ...
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0answers
41 views

arcgis flex api turn on/off group layers

I just started using ArcGIS API for Flex. In my case I need to provide a widget to turn on and off several layers together, which means these layers need to be turned on together or turned off ...
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1answer
71 views

How to create a text file containing layer names in QGIS?

My QGIS ToC contains layer groups and some layers that do not belong to any group. I would like to create a text file containing the name of those layers that do not belong to any group. Is there an ...
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1answer
63 views

Giving line features of same layer different colours

I have one layer and there I have different lines. Imagine these lines are pathes of persons. So image a person x and y. And I now want to differ them by just watching on the different colours of the ...
0
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1answer
19 views

Openlayers cluster stragegy total count

How can I get total feature count of vector layer: var mylayer = new OpenLayers.Layer.Vector(null, { "protocol": myWFSProtocol, "styleMap": style, "strategies": [ ...
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3answers
52 views

Creating layers for each attribute value via Arcpy script

I'm having some trouble starting this script. Not sure how to start, as I have to create/output layers for each attribute value from a certain column named that has integers. They are all unique ...
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26 views

Selection layers ie selection by location or attibute. Are selections retained when the data source is updated

I have a several large feature classes , that are over a large area. I am only interested in an Area of Interest inside the this area. So I have used an Area of interest shapefile and used this as the ...
1
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1answer
44 views

How to create a layer from existing attribute data of another layer?

I am using Arc Map 10.2 and I have a shapefile consisting of parcel data. I would like to create a shapefile/layer from the existing parcel shapefile by using a table that consists of a list of ...
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1answer
57 views

Using layer file to apply symbology to shapefile with ArcPy?

I have code that doesn't work at the moment: # Import arcpy module import arcpy # Script arguments Input = arcpy.GetParameterAsText(0) if Input == '#' or not Input: Input = "frame" # provide a ...
1
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1answer
61 views

why does my script not save a layer when it encounters a “ \” character in the string

i have some code that takes a field and finds every unique value in that field. it then creates a layer for each unique value. The code is working ok , but it is failing when there are \ characters ...
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1answer
46 views

Using union and area increases?

I have two layers … assume A and B … one is landuse and one is limit of that. The main reason to union these two layers is to calculate street. But my problem is after I union these two the area ...
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0answers
51 views

Make a group layer in ModelBuilder

I've got a model that iterates through a whole bunch of files and creates layers from certain of those files. I'm trying to put together another tool that will group the produced layer files, but I ...
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1answer
52 views

What defines where the files will be saved?

Hi I have a script I am using to save out layers automatically I have posted another question here ArcGIS creating individual layers for unique attribute in a given feild. Limitations of Where ...
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44 views

ArcGIS creating individual layers for unique attribute in a given feild. Limitations of Where Clause

I am putting together some code that makes a layer for each unique attribute within a given field. So if I had a shapefile that contained point data for locations of say postboxes in every city , for ...
2
votes
1answer
331 views

Define spatial reference of layer in ArcGis JavaScript API

I get an error "Map: Geometry (wkid: 3301) cannot be converted to spatial reference of the map (wkid: 4326)" when I want to add only graphics layer. I found that spatial reference for a map is defined ...
0
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1answer
37 views

QGIS add layer not working

I have QGIS 2.8. I open up the database manager, connect to PostGIS, and then execute a query. The resulting query has an id column, a name column, a geom column, and a membership column. I click on ...
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80 views

CMV LayerControl configuration

I've been reading through the help and readme.md and playing with the configuration options for the CMV LayerControl and I'm pretty confused by the possibilities. It seems to me there are at least 2 ...
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1answer
123 views

External layer switcher and layer order

So I'm using an external layer switcher because I need it imbedded in a bootstrap dropdown menu. It works really great except for one thing.... when I change between viewing my base layers, the ...
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1answer
65 views

Add layer to mxd files ignoring specific item- arcpy

I try to add layer (abc) to several mxd files with arcpy and ignoring mxd file which called "land use" . I work with arcview 10.3 : import arcpy,os,sys,string,datetime import arcpy.mapping from arcpy ...
3
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1answer
42 views

How to remove a feature from a layer created with “Make Layer From Selected Features”?

In ArcGIS desktop, I select some features from a feature class (say with the "Select By Location" function), and then right-click and choose "Selection--> Make Layer From Selected Features"(online ...