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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Geoserver layer rotation problem

I have a mapping system setup with PostGIS, Geoserver 2.4.1 and OpenLayers 2.12 I am trying to use the geoserver vendor specific parameter "angle" to rotate a layer, and it seems to work fine. ...
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2answers
377 views

How to clip a lines vector layer to a polygon layer in QGIS?

I've perused through previous questions and haven't been able to find an appropriate solution to my problem yet, so I wanted to post here. I have a lines layer (a contour map of mean annual ...
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90 views

Clipping multiple layers in QGIS 2.2

I have huge amounts of data (multiple country-wide shapefiles) which i have to work with constantly. But working on separate cases i only need a fraction of that data (region, city etc.) Loading the ...
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1answer
66 views

Running Erdas command in MS-DOS

I have generated the following command line in ERDAS, and want to run it in MS-DOS. Getting an error- "system cannot find the path specified". I have checked the path by opening it in windows ...
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1answer
401 views

How can I export a list of an mxd's content (layers names) into a table or a pdf?

I am using Arcgis 10.2. I have created a set of mxd from which I need a list of the layers and their characteristics (Name, sources, symbologie - maybe as in legend, if there is an Definiton Query, ...
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103 views

what dictates the drawing order of overlapping features with in the same layer/feature class in ArcGIS?

I know that in ArcGIS drawing order is controlled by layers, and if I want to make some features be drawn on top of other features I can use definition queries to separate them into different layers ...
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2answers
184 views

How can I create a pdf map at a high resolution while still keeping the file size manageable?

I have numerous layers in shapefile format that contain a lot of data across a large area. I am trying to create a .pdf file that shows all of the area and I want it to be in good quality, so that ...
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2answers
1k views

How to remove layers of detail from an osm file?

I want to remove some layers from the osm map of an area. It has all the details like POI, offline routing and all. But I just want the map data. How can I remove this extra layer from the map?
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2answers
98 views

Open mail client when clicking feature in Attribute Table

One of the attributes/features of my layer contains an email address. I'd like to be able to open the default mail client by clicking on the mail address from the Attribute Table. After some initial ...
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1answer
140 views

Why is shapefile not drawing in expected location after (or before) using Define Projection tool? [duplicate]

I have downloaded this zipped shapefile of bus routes from the City of Houston data portal. I then performed these steps in ArcGIS Desktop 9.3.1: Extracted the shapefile from the *.zip Added this ...
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22 views

Statistics on matching point layers ignoring nodata values in QGIS

I have a large area and a street crossing this area. Both are vector point layers in QGIS. The large area contains -99 as NoData value. I already created the intersection of both as a new layer. I ...
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1answer
71 views

Overlap or intersect two choropleth [closed]

I have two choropleth of the same area but with different concentration data and I need to overlap them. My aim is to highlight the areas of intersection between the points with the highest ...
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30 views

I want to make a table that displays shapefile information

I have a parcel I'm working with that has multiple layers laid over it. I'd like to make a table that displays various attributes of those different layers. For example, within that shapefile, I'd ...
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50 views

Alternative satellite and hybrid layers for Europe published on WMS

For an application I am building I require to show satellite (high resolution) and street view layers, preferably also a hybrid view. Unfortunately, due to the application not running on a typical ...
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1answer
633 views

How to add layer with ArcPy and retain feature class metadata (like Credits) in layer properties?

I have multiple feature classes in a geodatabase, each feature class has metadata including a Description, Credits, and other information. If I use the 'Add Data' button in ArcMap 10.1 to add one of ...
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1answer
61 views

How to determine number of layers in a given .mpk file and then enumerate it using ArcGis Runtime SDK for WPF 10.2

I need to determine number of layers in a given .mpk file and then enumerate it using ArcGis Runtime SDK for WPF 10.2. Can anyone provide me some link or code/snippet..thankyou
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1answer
66 views

geoserver/openlayers: multiple layer geotiff

I have a geotiff file with multiple layers (46 layers), each layer corresponding to a different date (the geotiff layers corresponding to sea surface temperature, 1 layer per year). I imported this ...
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1answer
176 views

QGIS 2.2 - expression string builder to ignore NULL values

Simply put, I would like to create a rule-based filter whereby you add 2 columns together and you get a certain colour as a result. However, some fields in Column_1 may be NULL and those exact same ...
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50 views

How to intersect more than 2 layers in QGIS

I have a dozen layers, some intersecting with others. Using the Intersect tool only allows 2 layers at a time but can you add extra layers to find where it intersects? Even if it's 3 layers as shown ...
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1answer
73 views

ArcPy - Add Layer from Cursor Selection

I am trying to add layers from the fields of a reference layer using select by location and a cursor. Also, want to prompt the user with a message box asking if they want to add the selected by ...
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20 views

Layer offset issue in QGIS 2.0.1

I have two loaded WMS layer and want to change their position relative to each other. First, I tried to use Layer class and write some kind of plugin, but I can't find any method that allow to change ...
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1answer
131 views

Is it possible to store a default symbology layer in an arcpy add-in?

Since arcpy is limited in how symbology can be manipulated, I was curious to know if a symbology layer can be stored in an arcpy add-in. Does anyone know if it is possible to store a .lyr file, or ...
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18 views

Can QGIS2 refresh layers without the need to reclassify each layer individually?

I have a set of layers which I'd like to have refreshed each time I open QGIS2.2.0 (Windows 7). Each of 14 layers (polygons) is linked via a join to a csv file with no geometry. The layer displays a ...
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31 views

In QGIS Process Modeller, is it possible to automatically run a function on several layers without listing all combinations?

Trying to develop a Model which includes finding any intersections between layers and then merging them all into a single layer. I have 12 layers in total, it's not really efficient to list all the ...
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21 views

Can a joined-layer have its attribute changed depending on what layers are selected/deselected?

Using QGIS, I have a polygon-grid layer which covers everything, Layer_All joined with 2 other grid layers: Layer_1 and Layer_2, both of which intersect at various points. I would like Layer_All to ...
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1answer
56 views

Restrict WMSLayer (not map) extent with ArcGIS JavaScript API

Is there a way to restrict the rendering of a WMSLayer to a specified extent without restricting map panning and zooming? That is, I need the client to be able to pan outside the limits of the ...
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2answers
74 views

Show only some buildings

How do I show only some buildings? I only need to show 3 cabins in the forrest, but not every house in the whole village around, and the city close by. Maybe some of the symbol buildings in the city ...
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1answer
239 views

QGIS/PostGIS layer styles

I've made a plugin asking for login credentials to a DB. Once logged in, the plugin is loading some layers from the DB. In the DB there are both admin and "normal" users. I've saved two styles to the ...
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1answer
61 views

Displaying QGIS layer after loading with Python

I'm successfully loading several layers with Python, but can only get to see them in the map window if I manually zoom to extent afterwards. Once the last layer is loaded I call zoom to extent in the ...
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2answers
399 views

OpenLayers: WMS layer above select-controlled vector layer?

Is it possible to display an image layer (WMS or Image) above a vector layer with activated SelectFeature control in OpenLayers? The image layer (radar returns) contains only sparse, semi-transparent ...
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1answer
71 views

How to disable “Simplify geometry” via Python?

After I've loaded a layer from a table in my db I'd like to disable the 'Simplify geometry' (found in Layers/Properties/Rendering) programatically using Python. I've tried several versions of ...
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1answer
76 views

Layer relations via Python

Is it possible to, through Python, to create the relations that it's possible to create in Layers/Properties/Fields/Relations, and if so how? I first thought these were saved in the styles, but that ...
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2answers
253 views

GeoServer create layer from PostGIS (data type point)

(Several days ago a user on gis stackexchange suggest that I should use OpenGeo (I was using geojson before). I succeed at what I was doing at that time, but now I have a different problem.) I was ...
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298 views

OpenLayers modify selected feature

I am trying to modify an already selected vector (feature) in Open Layers. In my map i have implemented "select on click" functionality, so what i would like to achive is to have a "Modify" button ...
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37 views

Changing the symbology of layer when converting from Layer to KML using Python

Is it possible to change the symbology of a layer file using Python? I have a script that creates a layer file and converts it to kml, but every time I run it the symbology color in the kml of the ...
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1answer
156 views

How to select only polygons that overlap with another layer?

I have two shapefile layers created from different thresholds from a predictive model (Pink=80; Yellow=95). Is there a way to create a new layer of only those pink polygons that contain yellow ...
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63 views

How to activate edit tools

I have opened a project I worked on earlier on another machine, but the edit tools are not active, so i cant turn on editing to change a layer. What is the reason for them to be gray, and how can i ...
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45 views

Android app where i can import image and set waypoints by GPS

Hello i'm looking for an application for android where I can upload a large image raster and apply for it `these GPS waypoints. We would like to count the trees in the area, we have the exact raster ...
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3answers
182 views

Is there an iOS app to display several offline raster maps with transparency?

There are several iPhone apps displaying offline maps. Some of them can show custom maps, for instance loaded as MBTiles or sqlite files. Galileo-app does this pretty well. But it is only possible ...
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907 views

legend groups and layer position/order qgis 1.8

I'm tring to programmatically create layer sequence also using groups. Simple python code: layer = QgsVectorLayer("004cp000.shp", "004cp000", "ogr") QgsMapLayerRegistry.instance().addMapLayer(layer) ...
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28 views

LayerSwitcher problem in FireFox: layer after turn off and on are not displayed

I have a problem displaying layers using the LayerSwitcher. The problem only occurs on FireFox and not in the IE. On some applications, layers which I turn off and again on, are not displayed until I ...
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33 views

In Opengeo 4.0.2 suite, enabling labels causes map to show pink screen.

In Opengeo 4.0.2 suite, enabling labels causes map to show pink screen. The map shows up properly if labels are switched off. I am using Opengeo 4.0.2 suite on Ubuntu 13.10 server. How do I ...
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108 views

Geoserver tile caching

i have a problem with "tile layers". i want to display my layers in tile layers but i always have a blank page. i'm already displaying them in the "Preview layer" with openlayers and it worked. i ...
3
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1answer
429 views

Export multiple layers in ArcMap 10.1 and change each layer's source to exported data

A client has requested the MXD and relevant data for a particular map. The file contains over 40 layers across multiple data frames and references multiple geodatabases and shapefiles. Is there a ...
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0answers
25 views

Show the paths but not roadsides and driveways in the line layer

I want to display paths in the woods but the paths are all in One (line) layer that contains all roadsides, pavements, drivvays, but also paths, tractor road and other relevant roads in, and up to the ...
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1answer
166 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 ...
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84 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 ...
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2answers
129 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 ...
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2answers
4k 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 ...
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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 ...