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.

learn more… | top users | synonyms (1)

1
vote
1answer
329 views

QGIS Quickly switching overlapping raster images

I'm new to QGIS, and haven't used arcGIS in about 5 years, however I've just seen someone using arcGIS and was able to quickly switch between overlapping rasters when checking registration. The top ...
0
votes
0answers
152 views

Crash when editing a layer and when saving in QGIS

When I edit the layers, and its small changes like adding a name (or make it appear in the map), QGIS very often crashes (like for every third or fourth or fifth edit, seldom gets past ten edits ...
2
votes
2answers
151 views

How can I share my own spatial data on an online map?

Note: I am very new in this field! Can I find an open source map that enables me to display an overlay of my own layers? I need to add some text and rectangles for a certain area, but my ...
7
votes
2answers
5k views

Leaflet: How to move the layer-control menu?

This might be a silly question, but I could not find a documented way to achieve this. I'd like to freely position the layer-control menu, probably to the top left near the default zoom-in/out ...
1
vote
1answer
25 views

Icons of different layers cover each other

I have converted 6 KML files (including a set of points) into 6 layers by ArcMap 10. For points in each layer, I have considered a special icon with a specific color. I also decreased the size of ...
0
votes
2answers
179 views

CartoDB Vis - Multiple layers mouse interaction?

My map visualization has two layers: 1) A city layer where the cities are represented as standard markers. 2) A county layer underlying the cities which has county level aggregate data. The layer ...
4
votes
2answers
353 views

OSM zoom levels correspond to what level of text labels?

I'm using Maperitive to render OSM map data of Mexico City as SVG files, destination Illustrator and then print (on paper, in a book). At different zoom levels, the resulting maps have different ...
2
votes
0answers
56 views

Updating Description of MXD Layers

Is there a way to force the update of the Description content in the Properties/General/Description of each feature layer in an MXD? I frequently update metadata for each feature class in ArcCatalog, ...
1
vote
1answer
134 views

Delete Turned Off (Unchecked) Layers from Arcmap with Python

I have about 100 figures that have been updated countless times and a lot of the old data was left in each .mxd but was only turned off (unchecked) and not removed. I would like to remove these ...
5
votes
0answers
48 views

What prior art can be cited to refute Apple's claim to have invented Interactive Map? [closed]

In U.S. Patent Application 20130339891 Apple Inc. claims "An interactive capability enables a user to dynamically adjust the content of an electronic map" as well as "Geospatial applications can be ...
3
votes
1answer
275 views

Show alternating contour lines

Is it possible to show only every other counture line? And how do you do that? (Im new to QGIS Lisboa 1.8.0, but even newer to QGIS Dufour 2.0.1, but have used ArcGIS a bit a while ago, and also ...
3
votes
1answer
49 views

qgis2 - hide a layer (or its labels) when another layer is coincident?

I have two road layers - one is a subset of the other, so, there's a lot of overlap. When they are coincident, I see labels from both layers. The 'lower' layer is the thin line road in the SW ...
1
vote
3answers
231 views

How to prepare a multi-colored vector layer?

I need to present a multi-colored vector layer and something similar to below: I need to prepare the vector layer by making use with the data set available in my database. Inside my database, I ...
0
votes
1answer
3k views

How to Obtain the feature attributes from feature collection

I am able to obtain the features of the layer which is selected by the user in the Layers table and then intersected by a user defined polygon, using e.features. I was able to obtain the attribute ...
0
votes
1answer
52 views

Calculate best area with overlaying multiple layers buffer shapes

I am using QGis and I have a set of 20 layers with buffers. I'm interested in where they overlap most and I want to create a single layer that shows which are the places where they overlap most and ...
0
votes
1answer
103 views

Graduated colouring Voronoi polygons? (QGis)

I've got a huge database of depth points for the whole Irish sea which I'd like to be a nice smooth surface, or at least have a depth value associated with the entire area (i.e. include the ...
3
votes
3answers
413 views

How to speed up redrawing of layers (from shapefiles) in MXD? [duplicate]

How do I speed up the process of redrawing layers in a MXD? I have already tried reloading and indexing the layers. The layers were created from shapefiles.
22
votes
5answers
15k views

What is difference between map layer and spatial dataset (e.g. feature class, shapefile)?

This may be very trivial question. To me they seems very similar in concept. What is the difference between feature class and feature layer?
3
votes
2answers
361 views

How to subsribe Web Map Service from GeoServer?

I have my shapefile inside GeoServer and I already published it as a layer. I am able to preview the layer under GeoServer web interface. Now, I want to subscribe / import/ retrieve the shapefile as ...
3
votes
1answer
2k views

Add simple image layers to MapBox / Leaflet?

Is there an easy way to add simple image layers (with no, or very limited, GIS data) to Mapbox and/or Leaflet? Google maps seems to have the ability to add custom layers, simply by attaching the SW ...
1
vote
1answer
136 views

ArcPad VBscript restrict layer editing

I am attempting to restrict editing on certain layers based on the user log in. Dim objLyr1 Dim objLyr2 Dim objLyr3 Set objLyr1 = Map.Layers("PatchPanel") Set objLyr2 = Map.Layers("wHydrant") Set ...
1
vote
1answer
1k views

Adding multiple layers in CartoDB using createLayer() not working

Using CartoDB (cartodb.js 3.5.02), it seems like you should be able to add multiple, independent tile layers to an instantiated Google Map. I've tried using createLayer() a number of ways, using both ...
3
votes
2answers
194 views

Why might layer appear not to turn off in ArcMap?

I was called over to try and fix an issue with a coworkers ArcGIS software (ArcView 9.3.1 SP1, Windows 7) and couldn't fix it. When a certain layer is turned off in the table of contents it never ...
0
votes
3answers
450 views

How to symbolize a layer on multiple fields?

I'm working in ArcGIS 10. I have a layer that contains 8 attributes and each one of these fields can be categorized into 3 sub categories. I need to display them on a single map. Update I ...
3
votes
1answer
1k views

how to fix greyed out edit button

I created a QGIS map, which I was able to edit (right click on layer and select toggle edit, or use button in tool bar). Having returned to work on the plan, most layers now have this button greyed ...
0
votes
0answers
190 views

how do I add attribute features to an attribute table which already exists?

Using Verson 2.0, downloaded as normal. I have an ESRI shapefile of my road map for 2006. I have a paper map of roads for 1969. I want to see what roads have been built between 1969 and 2006 (none ...
0
votes
1answer
555 views

How to extract list of layers in MXD using ArcGIS Desktop 9.3.1 and Python 2.5?

I have been trying to extract a list of all the layers in my mxd (Arc9.3.1), using Python 2.5. If I could have the source of the layers too that would be even better... But as long as I can get a list ...
0
votes
3answers
108 views

Many to Many Efficient Routing

Not sure if this has been posted yet. But I couldn't find any software that can do this yet. I am given a large set of random locations and a set of set office location. I would like to map the ...
1
vote
0answers
238 views

How to add a MSSQL spatial layer using Python?

I'm having difficulty adding a MSSQL spatial data layer using Python. The database is password protected, and I can add the layer without any problems using the built in feature, but I can't make it ...
2
votes
2answers
425 views

How to load layers from postgis to dotspatial or sharemap viewer

I want to develop a PostGIS viewer for PostgreSQL (with SQL query editor) to visualize PostGIS layers. Which spatial library (.net C# supported) do I have to use?
0
votes
1answer
175 views

Split by attribute automatically on several layers in QGIS

I need to do a 2 stage split by attribute, using QGIS 2.0.1-Dufour. After the first split, I got 30 layers. Is there any way to do the second split automatically? I don't really like the idea to make ...
0
votes
2answers
141 views

How to save all layers in a MXD with arcpy

I'm using this code and it does not work. I simply want to save the layer after I repair the source/symbology/etc without manually clicking, save as layer file and overwriting the file. import arcpy ...
2
votes
1answer
463 views

How to copy single polygon and paste multiple times to same layer in Arcmap 10?

I'm attempting to copy a single polygon and paste it 113 times to make "parcels" for a condominium building.
0
votes
2answers
84 views

Trouble using saveACopy with group layers [closed]

This code works fine on layers in the TOC that are not group layers, but errrors out if there are any group layers in the TOC. import arcpy, re, os arcpy.env.overwriteOutput = True #loop through ...
1
vote
1answer
86 views

How to preview new added layer in Geoserver?

I get my GeoServer up and tried to published my layer. I have my own shapefile and I follow the document below to add new layer intend to publish it. geoserver shapefile-quickstart doc Referring to ...
2
votes
0answers
81 views

Is there a size restriction on KML layer in esri map?

My website utilizes ESRI's map and it contains several KML layers. Most of them show up fine except for the ones bigger than ~4MB. Are there any restrictions on KML file size? Thanks,
5
votes
3answers
3k views

How can I set the base layer of map before initialization?

I have been using map.setBaseLayer(layer); to switch to my preferred map layer, using the localStorage variable layer that is stored in my web browser, upon initialization of the map. But I realize ...
2
votes
1answer
45 views

General terms for the Esri-terms “Layer” and “Feature Class”

I'm familiar with these terms used by ESRI: Layer Stores visual properties (color, symbols,…) does not store data (attributes, coordinates) links to a Feature Class (or raster data) Feature Class ...
1
vote
1answer
521 views

How to convert shapefile to KML file using ArcPy? [duplicate]

Python script that checks to see if a specific layer file exists in the current workspace and, if it does, converts the layer file to a KML file. Does it work with a shapefile? Code so far: for file ...
0
votes
1answer
710 views

How to zoom to the extent of Qgsvectolayer qgis?

Anyone know how to zoom to the extent of a Vectorlayer in qgis using python plugin?
1
vote
0answers
102 views

qgis 1.8.0 crash when starting qthread

I am trying to update a vector layer attribute table using QThread. i connect a pushbutton click with a slot to start the thread: def EGSupdateAttributeTable(self): AttUpdateEGSThread = ...
1
vote
1answer
124 views

ESRI ArcMap Topology rules on multi story buildings

I would like to run some topology rules to find snapping errors in our polygons but I am running in to the problem where we are working on multi story buildings with every polygon regardless of floor ...
0
votes
0answers
207 views

how can i read an attribute value from qgsfeature?

How can i read an attribute value from qgsfeature ? i am trying to update some attribute using other and i have to read value from attribute in the qgsfeature . my source code: provider = ...
2
votes
1answer
982 views

How to activate a layer in QGIS layers legend

How can I activate a layer in qgis map legend automatically using python code . I am using qgis.utils.iface.setActiveLayer(self.theLayerToEdit) but the layer is still not checked in the maplegend. ...
1
vote
0answers
77 views

Sources for meterological data with high resolution

I was running Maxent on an endemic species of andaman and nicobar.But the climate data I have from worlclim.org ( tile number 29 ) is not of high resolution and thus I can't see the distribution ...
4
votes
4answers
1k views

How to get vector data from OSM to use in QGIS?

How do I get data from OpenStreetMap which I can then edit in QGIS layer by layer? What is the best OSM output and what / how do I get to a suitable input for QGIS? OR...is there another appraach to ...
6
votes
2answers
1k views

Can QGIS preserve layers when exporting a PDF? [duplicate]

I saw this posted about a year ago (Can QGIS preserve layers when exporting to PDF?) but figured it was worth asking again -- is this possible? My usual workflow with ArcGIS is to export to AI then ...
0
votes
0answers
85 views

Geoserver 2.4.0 via the web admin interface, not adding layers in Internet Explorer, but working in Firefox

For some reason I cannot seem to add layers via Internet Explorer, but I can via Firefox 23. In addition the styles that I upload also appear broken in Internet Explorer 8, but do not in Firefox. Is ...
2
votes
1answer
869 views

QGIS python - reference a layer in the table of contents

I'm trying to create a plugin for QGIS using python, But need some help. I want to 1.Zoom to a layer and 2. make the layer visible(switch off or on). But I have managed to zoom to an active layer by ...
2
votes
0answers
109 views

why is my map is not in the center when I load my map in OpenLayers?

why is my map is not in the center when I load my map in OpenLayers?And when I drag my map,it dont move sometimes,It has been tortured me for a long time,any advice would be grateful! var maxExtent = ...