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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Some Help to select some features from a vector layer

I have a vector layer (kml) that has some point with scientific name of plants and animals, some description of the place where the people saw them and the coordinates. Basically the table associated ...
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2answers
1k views

Why am I unable to publish a postgis layer to geoserver?

I left arcgis and microsoft sql and now I am trying to connect Qgis+PostgreSQL (PostGIS) + GeoServer. I've brought my postgis database to the server, created a "store". And now I'm trying to publish ...
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1answer
1k views

How do you symbolize a feature class layer in ArcMap 10 based on one attribute's value and then another attribute's value?

I currently have a point feature class that has a couple of attributes that I want to use to symbolize its layer. One of the attributes is called ExceedsTolerance, which either has "Y" or "N" for its ...
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2answers
423 views

Unable to select Vector Layer

I am using the following example, to select a vector layer feature on click. The example demonstrates Highlighting and selecting the layer. I was able to successfully implement the Highlighting of the ...
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2answers
212 views

Add record in related table ArcPad

i have a layer form (named form_layer) containing a combobox and allows to add records into the related table, by showing a form of the related table (named form_table) When i try to add record ...
5
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2answers
790 views

How to copy a group of layers between QGIS projects?

In ArcGIS I am used to being able to have a couple of MXD documents open and copy-paste groups of layers from one MXD's table of contents to another. This can save a LOT of time ensuring consistent ...
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2answers
800 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 ...
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1answer
535 views

is it possible to convert 9.3 lyr to 10 lyr

I have a customer who sent me a lyr file in 9.3 and I am using 10, is there a way to import it in. It seems to hang up whenever I attempt to open it! Thanks
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1answer
1k views

OpenLayers - How to display selected features as graphic markers?

I'm attempting to render a point feature as a graphic. When that feature is selected I'd like to display a green indicator above the graphic. It seems backgroundGraphic and externalGraphic are ...
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2answers
148 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 ...
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5answers
10k 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?
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2answers
2k views

How can I iterate over map layers in QGIS python

I'm having trouble figuring out how to iterate over map layers. I can access the currently highlighted layer in the table of contents via iface.activeLayer() but I want my code to operate on all ...
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1answer
229 views

Repairing disconnected layers with selection sets

Has anyone had any success of repairing disconnected layers that have selection sets that have their data sources broken in ArcGIS? Is there a way to detect this through code and then re-create that ...
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3answers
5k views

How to get the layer name?

I am using OpenLayers, Geoserver 2.1 CQL language. The problem is that I do not know how to address the layer. I am trying to call a function like this: var createWmsLayer = function(name, url, ...
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1answer
276 views

need to show multiple symbols for one point

I am working on a state map of parks with campsites. I want to show symbols for handicap access, tent camping, backpack camping, winter camping, rv camping. I have used a symbol for handicap but it ...
5
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1answer
953 views

Can I change properties of several layers simultaneously?

I'm working on bulk data. I have a few hundred GeoTIFF images imported into a QGIS project, and I'd like to modify their layer properties - things like the no-data-value, transparency of certain pixel ...
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1answer
1k views

Adding time enabled layers to ArcGIS online

I am trying to add time enabled layers into ArcGIS online. The information in the ArcGIS resource center makes it sound like it is possible to add time enabled layers from ArcMap to ArcGIS online. I ...
2
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2answers
974 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?
2
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1answer
106 views

Keeping a vector layer always on top

I want to know how to keep a layer always on top of other layers! After adding a vector layer ( QgisInterface->addVectorLayer ), I want that layer to always be displayed on top of layers added later. ...
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1answer
312 views

Tiff raster display with polygon layer

Does any body have an idea about why *.tiff images are not displayed when added as raster layer to QGIS after adding a vector layer which has a polygon geometry? SOLVED !! In fact the tiff is ...
5
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1answer
496 views

MXD Performance - number of layers vs number of datasets

My mxd currently has 5 buildings layers accessing 5 different buildings datasets (one for each of 5 counties). Most often there would only be a single county's buildings in the current view, if that ...