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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33 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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33 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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38 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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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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1answer
45 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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44 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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1answer
40 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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39 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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38 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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16 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 ...
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42 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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89 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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36 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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60 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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3answers
53 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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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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44 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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29 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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103 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
94 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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44 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 ...
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1answer
45 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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1answer
93 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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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 ...
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2answers
138 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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1answer
66 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 ...
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1answer
27 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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1answer
48 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 ...
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3answers
60 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 ...
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1answer
46 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
69 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 ...
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1answer
48 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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57 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
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
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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46 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 ...
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1answer
38 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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97 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
72 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
48 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 ...
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1answer
87 views

Select by location-arcpy

i work with arcview 10.3 on 20 mxd's (each mxd has 25 layers) and i try to do select by location (with arcpy) and want to see a layers that are visible in the current map extent only. All Other layers ...
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24 views

Need to add an Image over my map

I am working on loading an image from my computer on my map. Using map.addLayer(). No example of ol3 is of help. Can anyone please help me with adding an Image in a layer over the ol3 map?
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18 views

Feature Rotation Exception

I am getting an error when I try to change the value of a feature's Rotation Value. I have a schematic feature that I would like to rotate by changing the field's ROTATION value, but everytime I try ...
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2answers
73 views

How to remove layers that are not in visible df extent

I am working on ArcMap 10.3 and I have a map with 50 layers in it. I am trying to check if layers are in a data frame. Unlike How to check if layers in a dataframe with Arcpy, I want to define the ...
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1answer
64 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 ...
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1answer
64 views

How to remove a layer and its legend in a standalone pyqgis application?

In continuity in my question "How to add a legend to a canvas in a standalone PyQGIS application?" > In every addition of a new layer in my standalone application, the legend lengthens and becomes ...
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1answer
67 views

How to add graphics to map at lowest level?

I am able to create graphics and add them to the map, but they are getting added as the top-most layer. The labels (if active) of another layer get hidden due to this. I want to know how to add ...
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1answer
53 views

GIS information on worldwide cases of wildfires?

I am developing some case studies on wildfire cases around the globe, some examples include California (2007), Australia (2009), Moscow (2010), Valparaiso in Chile (2014), and so on. I was wondering ...
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1answer
52 views

How do I take a contour .shp file and create a separate layer for each elevation?

The end result is to have a .dxf file in which each different elevation resides in a different layer. If at all possible I would like to be able to do the organizing in tile mill, or through some ...