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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60 views

First click layer selector doesn't work in CartoDB?

I'm working on an interactive map using CartoDB built of Leaflet.js. I added a layer selector which works fine after the first click. The first click just doesn't work, if I click the selected layer (...
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1answer
90 views

How to make one checkbox that shows multiple layers in qgis or qgis2web?

I need to create one checkbox in qgis (and qgis2web) that than will show 2 other layers. So basically i don't want to check two checkboxes in the layerlist, but i want to simplify this proces by just ...
2
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2answers
53 views

How to use loop to add georeferenced JPEGs from folder to mxd?

This is my first time using this site and I'm a bit new to ArcPy. I've looked around for a while but couldn't quite find the answer I was looking for. I have many folders with georeferenced topos in ...
6
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1answer
119 views

Establishing Default Query layer for Google Earth in “Map to KML” export from ArcMap?

I export a lot of maps for customers who request them from our office. Recently I have seen more and more requests for us to export our GIS into the .KML or .KMZ file type so they can be viewed on ...
13
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3answers
525 views

How many layers are too many layers in ArcMap?

I work on ArcGIS using a Citrix virtual software connection at work. It is dreadfully slow at times, and without any changes to the MXDs I'm working on, one minute ArcMap can be operating at a ...
2
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1answer
26 views

Automatic selection of colored regions when digitzing choropleth maps

I am new to working with GIS. I have a raster choropleth map similar to the one displayed below. I want to create a shapefile from the map, where each layer contains all the countries that have the ...
2
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1answer
85 views

Arcpy Code result- “NaN”

When i run this code (in arcView 10.3) in order to check the data frame extent, i received "NaN NaN" result with the exact data frame. I don't understand why python print this out? I checked in http://...
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3answers
37 views

Layer File data source

I have saved group of layers which are reading from SDE DB as layer file. When I open the layer file in any other MXD it takes the same SDE data source. How can I make the layer file without a data ...
0
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1answer
121 views

Printing ArcMap layers in black and white?

I am working in ArcMap 10.1. I would like to print a select few layers in black and white and have one or two layers print in color? Can this be done? If so how?
1
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1answer
67 views

In qgis2threejs html output select deselect the layers not working

I used qgis2threejs to output 3d model with a dem and another viewshed output. I want to tick untick the layers for displaying and not displaying the layer.But the select unselect option in right ...
2
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1answer
64 views

Getting selected layer name in QGIS Modeler

If I have a geoalgorithm in my model and I want the value from one the parameters, then how can I get it? For example I want the layer name in the parameter layer in below figure so I get the value ...
1
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1answer
100 views

Can multiple point symbols be stored in one QGIS layer?

I'm new to QGIS, indeed fairly new to GIS systems in general. I have been asked to create about 20 small maps for a local historical society. The maps are for walkers to follow various routes passing ...
0
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1answer
48 views

Remove layers using python- path orientation

Expanding on my previous question Code error - remove layer using python, i try to remove layers from mxd's (in ArcMap 10.3, python 2.7.8), that don't appear in the data frame with this code: import ...
2
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2answers
68 views

Update a group layer using arcpy

I work with several MXD'S and i try to update a group layer named "allHa" containing several layers with this code: import arcpy,os,sys,string import arcpy.mapping from arcpy import env env....
0
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4answers
130 views

How to add remote GeoJSON data to a Leaflet map as a new layer?

I seem to be having a problem parsing the GeoJson and adding the layer to a Leaflet map. var terrain = L.tileLayer('http://server.arcgisonline.com/ArcGIS/rest/services/NatGeo_World_Map/MapServer/...
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1answer
21 views

Removing existing backup layers and renaming current live layer in ArcSDE

Looking at the attached screenshot of Catalog, there are the file "CRT_CANAL" and many backups. The aim of this code is deleting old backups in the ArcSDE database, renaming the existing "CRT_CANAL" ...
2
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2answers
72 views

Search MXDs with specific dataSource layer using Python

I work with ArcGIS 10.3 and I try to search a specific layer (with dataSource named "D:\desktop\Project\layers\1.jpg" ) in hundred of mxd's that spread in folder "D:\PROJECTS" and it divided to ...
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1answer
65 views

Duplicate a layer applying a filter in QGIS

Is there a way, using Python, to duplicate a layer in QGIS as many times as the single occurrences of a variable contained in a field and with a filter applied on the duplicated layer based on the ...
3
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1answer
27 views

QGIS: Mergin two layers always creates new attibute field

I want to merge several layers into one. Each layer has a specific Attribute field (type: GG, DO, eg.). In the merged layer QGIS produced a new Attribute field for each type. I want QGIS to but all ...
1
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2answers
70 views

Redefining point shapefiles in MXD that have no projection and are located in different folders using ArcPy?

# Script to use Layers in MXD source file paths to locate and redefine projections import arcpy, glob, os, sys, arcgisscripting from arcpy import env, mapping path = os.getcwd() env.workspace = path ...
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1answer
46 views

Qgis layer renaming stays the same

I've been developing a plugin for Qgis, but something weird happend while renaming a layer, now whenever i add a layer using a button in my plugin, the layer is renamed with the last name I gave it. I'...
3
votes
1answer
77 views

Static maps API that serves roads/labels without basemap?

I am looking for a static maps API (similar to https://www.mapbox.com/developers/api/static/ ) that can serve the map without an underlying base layer. My intention is to generate images with the ...
0
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0answers
54 views

Mapbox source without access token

I found mapbox source of tiles that doesn't require access token (http://a.tiles.mapbox.com/v3/mapbox.natural-earth-hypso/page.html#3/0.00/0.00). Does it mean that I can use it without view limits (...
2
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2answers
98 views

How to remove all transparency from all layers?

I am using ArcMap 10.1 and I would like to remove all transparency from all the layers in the map at once.
0
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1answer
57 views

Changing coordinate system of layer?

I am using ArcGIS 10.1 and I would like to change the coordinate system of a layer that is already attached to a drawing so that it matches the other layers.
7
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2answers
473 views

Displaying legend item as polyline instead of polygon in ArcMap?

I am using ArcMap 10.1 and am trying to create a legend that will display a polygon layer as a single line.
0
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1answer
59 views

How can I add a new layer, then remove previous layer from a Leaflet/CartdoDB map without the map clearing everything

I am new to CartoDB/Leaflet. Here's my fiddle... http://jsfiddle.net/zippyferguson/fLkqgf4q/1/ If you click the play button, I want it to load data to the map year by year from 1966 to 2015 from a ...
3
votes
1answer
84 views

QGIS and python: Keep a layer always on top of the others

I am working on a python plugin for QGIS using a layer containing linestrings, which I would like to have on top at all times. I have added the layer like the following: QgsMapLayerRegistry.instance()...
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1answer
74 views

GeoServer WMS: Retrieved GeoTIFF band contains integer values instead of floats

I am using gdal_translate to import a GeoTIFF into an oracle database. The import as well as the layer creation in GeoServer works without errors. GeoServer correctly recognizes the band data type as "...
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0answers
39 views

How to query Tiger Data for Layers?

I am new to this. I have data downloaded from ftp://ftp2.census.gov/geo/tiger/TIGER2015/ and I would like to learn more about how I can query that data for the different layers it offers. Here is ...
1
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1answer
70 views

Multiple Leaflet TileLayers with extended maxzoom

I've got 2 layers(for indoor and outdoor) in my web application. If i zoom beyond 19, the indoor layer should be displayed and the outdoor layer tiles will be scaled up, because their maxzoom is 19. ...
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0answers
116 views

is it possible to combine multiple URLs for one ol.layer.tile in openLayers 3?

I have two Image services that I would like to combine into one layer; one has higher resolution imagery that draws only at a larger scale, and other has lower resolution imagery that draws at all ...
2
votes
1answer
26 views

Switch layer when zooming

I'm wondering if it is possible to set up a boundary on zooming for e.g. 3 different vector layers, so that when zooming in QGIS will automatically switch layer? For example layer 1 has scale 1:...
1
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0answers
61 views

ArcGIS layer transparency Issues

I'm using ArcGIS 10, working on the district boundaries of a country. I need to show certain cycles of a distribution and some of the districts are (partly/completely) covered in each cycle. Is there ...
2
votes
0answers
121 views

QGIS Space Syntax plugin with OSM data?

I'd like to do a space syntax analysis for a city I observe, but when I use the Space Syntax Plugin, the desired shapelayer roads doesn't show up. It's an OSM vector layer, what do I have to do to ...
0
votes
1answer
84 views

OpenLayers 3 XYZ layer issues with OpenRailwayMap

Code with issue on Codepen - Having successfully integrated the OpenRailwayMap API into Leaflet, I wanted to use OpenLayers instead and followed the API instructions, but am getting an error: " Cannot ...
1
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0answers
75 views

How to align with QGIS two layers that have the same projection?

I am using QGIS 2.12.0 to create forest maps. I usually succeed to create maps from shapefiles with different projections but for some reason I cannot succeed to align the layer of one shapefile. As ...
2
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0answers
34 views

QGIS, add a layer (shapefile) to a running QGIS from an external application

I'm trying to load a shapefile as a new layer into a running QGIS application using python within a Windows command shell. The python is basically what is explained in this post: How to open a layer ...
2
votes
1answer
56 views

Why QGIS 2.12 “forgets” selection colour opacity settings?

I have few vector layers which I need to edit frequently. I'd like to be able to see through the layer when it's selected. I changed selection colour from both: Project Properties General settings and ...
0
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1answer
31 views

Layers not overlapping in QGIS? [duplicate]

I downloaded a bunch of wpts from my gps. I converted them to .SHP format with a CRS WGS 84 in QGIS, and started a new project. I then exported some satelite imagery from the internet as a tiff and ...
1
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0answers
32 views

Point and Polygon Data refusing to display: corrupt data?

I have two sets of shapefiles, one point data and one polygon data. Both were sent as part of a bigger set of data. Neither the point or polygon data will display when loaded into QGIS. The raw data ...
0
votes
0answers
13 views

How to add an image to collapsed L.control.layers

i got my layers working with this code: L.control.layers(baseMaps,{'<img src="myimage.png" /> Test': json_TestJSON,},{collapsed:true}).addTo(map); This is what i dont like: the white empty ...
4
votes
1answer
60 views

Is it possible to get features from one layer within the bounding box of other layer?

I have 2 seperate layers say: water bodies layer, land layer from different sources but for the same location. as shown below: No I want to use the bounding box of water bodies layer and get the ...
1
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1answer
43 views

Layers being lost in QGIS

Does anyone know why layers would continually be lost from a project and refuse to reload even though the project is regularly saved?
4
votes
1answer
169 views

Excluding certain attributes from being labeled in ArcMap?

I am using ArcMap 10.1, and i am labeling a roadway system but would like to exclude certain road labels from being displayed.
0
votes
0answers
53 views

Searching for more than one propertyName?

how can i search for more than one propertyName? This is my code: var searchControl = new L.Control.Search({layer: mylayer , propertyName: 'myfirstproperty' , circleLocation:true , zoom: 15.0}); ...
0
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1answer
32 views

OD Cost Matrix (arcpy) Layer Not Added

I'm trying to create a OD Cost Matrix layer programmatically. The problem that I have, however, is that the layer doesn't get added to my Table of Contents. If I manually run the Network Analyst->...
0
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0answers
28 views

Changing color of individual parcels in CityEngine?

How do I change the color of individual parcels (i.e. specific section of a layer) using CGA codes in CityEngine? I have 4 sections within my layer and I need to change the color so that each one ...
0
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0answers
95 views

How to add filter to mapguide layer definition in c#

I want to add a filter to a mapguide layer programmatically in c#.net. I verify if the layersDefinition of my layer contains or not a tag "Filter" and I do the job: //Get mapguide layer definition ...
0
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0answers
22 views

Is there a way to re-order how layers render in Mapnik?

I'm creating Mapnik stylesheets and I am trying to edit the order layers are rendered. I tried just moving the XML code, but that didn't seem to work. Are there specific steps to make some features ...