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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51 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
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1answer
72 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: ...
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1answer
67 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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36 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 ...
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1answer
64 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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97 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
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1answer
25 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 ...
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60 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 ...
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103 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 ...
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1answer
70 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 ...
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71 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 ...
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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
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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 ...
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1answer
24 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 ...
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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 ...
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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
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1answer
54 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 ...
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1answer
42 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
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1answer
140 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.
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52 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}); ...
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1answer
31 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 ...
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0answers
27 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 ...
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80 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 ...
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21 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 ...
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37 views

Removing non-interactable “ghost” points

Non-professional here, working with ArcGIS 10.3 mapping soil data for an agricultural study and I have an issue with residual point features from a file I thought I removed. After I turn off all of ...
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2answers
218 views

Get the name of the layer from a layer Vector

My aim is to highlight that two differently colored layers wfs when passing the mouse over one of these layers. It would need to obtain the name of the Vector Layer and also use a style in one layer ...
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1answer
65 views

Code error - remove layer using python

Continuously to How to remove layers that are not in visible df extent i try to remove layers that don't appear in the data frame with this code: import arcpy,os from arcpy import env env.workspace ...
3
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1answer
89 views

How to merge layers into a single QgsVectorLayer?

I have a set of different layers (and their respective shapefiles) with information of electric lines. All the layers have the same Fields in their Attribute Tables, but contain information about ...
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1answer
235 views

How to remove marker added map with .addTo() function in leaflet?

I am having trouble removing marker which is added with marker.addTo(map). The remove works correctly if added as layer map.addLayer(marker) and then map.removeLayer(marker). But removelayer is not ...
2
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1answer
57 views

ArcGIS 10 PDF exports: toggle polygon layer visibility?

In the past I have been able to export my .mxd to PDF and I have been able to turn individual point layer's visibilty on/off within the layer tab (if the layers are in a groub in the .mxd's table of ...
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78 views

QGIS KML layer won't show up in Google Maps API

I've trimmed US Census shapefile data to show census blocks in just three states, by editing the attribute table. I then color coded the states based on values in the table by changing the style in ...
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27 views

How does qgis render vector layer on screen ? How can I do the same in a mobile device

Can you please tell me how does qgis software render the vector layers on the screen. I have a geojson file and I need to map its contents on the screen just like qgis does but without using base map ...
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1answer
60 views

Can script using arcpy.mapping.MoveLayer() be made to run faster? [closed]

We're running ArcGIS 10.0 and using a python script to move layers, turn on the correct layers, zoom to the correct extent and export a pdf map. The script normally takes 30 - 35 seconds to finish. ...
2
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1answer
33 views

How to display street names from OS StreetAny layer?

Using QGIS version 2.10.1-Pisa. I have imported layers from an Ordnance Survey data set. I have a layer called 'Street any' which gives me the boundaries of the streets which I can see. I can see ...
1
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1answer
224 views

Layer selection in Openlayers 3

I'm trying to develop a robust way to generate a UI incorporating map layer controls such as a base layer selector. I've read several posts including this recent one but I'm still not able to change ...
2
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0answers
34 views

FeatureServer layer losing connection to Feature Class layers (ArcMap/ArcServer) on adding .lyr

This is a question about using feature services as layers in ArcMap. We have a issue where layer (.lyr) files (source from feature services) are not displaying individual feature classes when added ...
1
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1answer
37 views

How can I remove feature selection from my layeroverlay in mapguide API?

I can add feature to my layeroverlay on mapguide API, but I don't know how to remove it. Can you help me find a method to remove a feature from a selection ? This is how i add features to my layer : ...
0
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0answers
57 views

Trimming downloaded Worldclim Climate Projection Layers to specific area in QGIS for use in Maxent Program?

I am very new to QGIS and modeling. I have downloaded many Future Climate prediction files(GeoTiff) from Worldclim. I only need to use a small portion of the globe, but they do not allow for the ...
0
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0answers
25 views

Exporting Raster Column

Probably an easy solution here I just cannot think of one. Using ArcMap 10.0 So I have a feature class which has 5 columns. One of them being a "Photo" Raster layer. This has over 2000 Objects in ...
1
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1answer
77 views

A python script to batch add layers to multiple rasters?

So I have looked at existing tools and there is nothing to batch change symbology to a myriad of raster surfaces (20+). Basically my manual process is to right click on the rasters layer properties, ...
1
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1answer
64 views

Get the name of the layer when I click on it with openlayers 3

I have a question, I need to make more than one GetFeatureInfo (obtaining information under the layer that you click), and for this I need the name of the layer I click on it to get the information. ...
1
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1answer
905 views

why can't I load a layers list to select from to the map in openLayers 3, addEventListener and attachEvent are unavailable

I've tried to incorporate this sample that shows how to switch base layers into a page I am working on: http://openlayers.org/en/v3.10.1/examples/bing-maps.html When I try to load my page with the ...
4
votes
1answer
136 views

GeoJSON Layer Order In Leaflet 0.7.5

I am developing a web application that brings in a number of tileLayers and geoJSON layers. For the tile layers I have been able to do similar to this JSFiddle in that the layers appear depening on ...
5
votes
2answers
210 views

Move a layer in QGIS to a precise position based on centroid

I'm not quite sure how to phrase this so apologies if it is a duplicate. I have a project that uses a series of lines created from the boundaries of polygons overlaid onto a map in QGIS. I understand ...
1
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1answer
22 views

Creating layer where more attributes are presented

I would like to create a layer in ArcGIS containing polylines, that are rendered by combination of more than one attribute. I can create layer where the polylines are of different thickness or ...
2
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1answer
88 views

Best practise for managing shapefiles in QGIS

One aspect of GIS that wasn't covered in my training was the best way to manage shapefiles within a project. In my hypothetical example I have a shapefile with a number of attributes. I want to ...
2
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2answers
389 views

Dynamically add layer(s) to Layer Group

I have an Openlayers 3 app and users can retrieve stored routes from a web service and display them on a map. Currently each route is added to the top of the index but I'd like them to be inserted ...
1
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1answer
64 views

Remove details from loaded OSM-layer? - Openlayers-3

I have created a tile server with help from this guide. Sadly I still have no software to actually create the tiles and because of that I load in a online map (HOT) from OSM via Openlayers: var map = ...
4
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2answers
294 views

How to activate a layer by its name in PyQGIS?

I'm writing a script that requires the attributes of different layers to work, and I would like to know how to call a layer that is not the currently active one and get its features. For example, I ...
0
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1answer
155 views

Leaflet Layer Visibility Checkbox

I have created this JSFiddle OpenLayers map that toggles the layers visibility using the bootstrap-switch. I am looking to achieve the same with leaflet but can't seem to get the equivalent of the ...