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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125 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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271 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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236 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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351 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: http://www.esri.com/esri-news/arcuser/winter-2015/create-a-python-...
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74 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 scale......
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472 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 4504764.7761;...
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104 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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57 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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104 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
187 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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1answer
124 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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210 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
56 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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194 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
66 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
54 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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1answer
76 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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1answer
299 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
117 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 ...
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385 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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311 views

Select by location in 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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61 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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158 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
113 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
217 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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245 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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82 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
139 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 ...
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2answers
87 views

SaveToLayerFile does not properly save symbology

I'm trying to save a symbology from a layer, but any way I try to do it, it just gives me a unsymbolised feature shapefile when I try to add the newly created .lyr file. Anyone have any idea why this ...
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107 views

How to define layer in QGis like in AutoCad?

I have imported a dxf file into QGis. While the importing processes split my dxf file into three layers - Point, Linestring and Polygon, which are different from the layer in AutoCad. I found the ...
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2answers
512 views

Referencing layer in Table of Contents using ArcPy?

I'm looking for the best way to reference a layer in the TOC using arcpy and, if it is possible, that is different than the following: mxd = arcpy.mapping.MapDocument("CURRENT") df = arcpy.mapping....
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1answer
79 views

ArcGIS Feature Class verse Feature Layer

In general is it better (more efficient) to work with Feature Classes (FC) or Feature Layers (a feature layer of a FC). I know when I construct model I always (or generally) work with feature layers ...
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2answers
112 views

SaveToLayerFile failed - “value is not a layer”

Tried doing a SaveToLayerFile on a layer in a workspace, but it confusingly says it's not a layer. I know it is a layer because the script can access lyr properties (e.g. name) and all of the ...
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2answers
511 views

Using Python to export multiple layers to .pdfs

I have found a solution to the issue below. The problem had to do with coding GetParameterAsText without actually using it as an input in a tool. That was the reason the raster layers wouldn't turn ...
3
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1answer
159 views

Is it possible to add a raster file as layer from an URL?

I have several geoTIFFs stored on a server that I can access through http. I would like to add them as raster layers analogous to adding a local raster file through the "Add Raster Layer" button, but ...
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1answer
314 views

How to iterate through feature class to produce multiple point density files in ArcGIS?

I'm trying to create separate point density layers for each feature within a feature class owning to differing density characteristics within each feature. I would like to be able to accomplish ...
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3answers
188 views

How to separate states in USA file using ArcGIS for Desktop? [duplicate]

I have found a few different files containing the entire United States, with attributes including states. Is there a way to separate the states out into their own files (perhaps in one file ...
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1answer
102 views

Problem moving layers in QGIS

Just wondering if anyone ever experiences any problems moving layers? I have set up QGIS in the office and it works brilliantly for everyone apart from one of my colleagues who finds that on odd ...
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0answers
61 views

Update shapefile name with layer name

I had a layer that I split by fields. The resulting files were given a name. I updated the names of the resulting layers in QGIS but have realized that the shapefiles have not been updated accordingly....
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0answers
27 views

Print boundaries of one layer over another [closed]

i am new to QGIS. I have a base map from google, openstreet map over which i want to show the boundaries of another layer. How can i do that? While trying to edit, is it possible that QGIS allows to ...
2
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1answer
477 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 ...
3
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1answer
480 views

how to copy layer and add to same mxd and rename layer using ArcPy and ArcMap 10.2?

I am trying to copy a layer in an mxd and add that layer to the bottom of the TOC using Python, but I have not found a way to save the mxd programatically without making a copy. I also haven't found ...
2
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1answer
360 views

Go through items in a composer legend (QGIS 2.6)

I'm trying to develop a plugin in QGIS 2.6, which opens a composer, add a map and a legend, and (among other things) adjusts the legend. Is there a way to go through items in a composer legend with ...
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1answer
346 views

Saving Feature Class Symbology into a Layer or Object to apply to another Feature Class

I am creating a tool to automate a data standardization process. Part of this process is saving the feature class (variable "filename") as a layer file, projecting it into another coordinate system (...
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55 views

PRACH data plotted in a better way but not completely

I am close to finishing the visualization of PRACH in mapinfo. Here's my output so far (for 4 counters) Unfortunately, for some sectors it is not working as it should be. Can you please help out? ...
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2answers
145 views

batch save as layer to relative path in ArcPy

I would like to use a similar code as below, but one that uses relative paths. Since my input is a batch of tif files (not layers), I do not know if I need to use other functions like arcpy....
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1answer
270 views

new layer from calculations with fields of other layers in QGIS

I've two layers, both with the same fields: A, V, where A is the shape's area and V a value given by me. I want a new layer with shape created by the intersection of the other layers' shapes and a ...
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1answer
158 views

Accessing “valueField” property of layer's symbology using ArcPy?

This has been really hard to debug, as I had no idea where to look at first, but I have made an attempt to access the "valueField" property of a layer file. This layer file is of the UNIQUE_VALUES ...
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1answer
103 views

Source for cloud cover map layer over UK

I'd like to add a layer to display historical data on cloud cover in a Leaflet project I'm currently working on. This is specific to a given day in 2012 for a city in England, and ideally I'd like to ...
2
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1answer
723 views

How to add label to QgsVectorLayer by Python

my goal is to define label programmaticly for the case similar for the figure below: But didn't find any guidance how to do so using Python. I have a feeling it could be done using QgsLabel but ...