There are several supported map libraries available to take advantage of NASA's Global Imagery Browse Services (GIBS) via OGC Web Map Tile Service (WMTS), Tiled Web Map Service (TWMS), and KML files. Listed below is a set of map libraries, code snippets, working examples, and screen captures designed to help in building your own user interface to explore NASA's Earth imagery. Alternatively, these guidelines can also help to integrate that imagery into your existing client or to build scripts to retrieve imagery from GIBS. Geographic Information System (GIS) users: go here for instructions.
In addition to the snippets below, fully-working code examples are available for OpenLayers and Leaflet in the GIBS GitHub project area.
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OpenLayers 3 is an open source, web browser-based mapping library written in JavaScript. OpenLayers maps can also be viewed on mobile devices since no plugins are required to use it. See the Live Examples (including Geographic, Web Mercator, Arctic, and Antarctic, notes on using OpenLayer 3 with GIBS, and clone the GIBS Web Examples from GitHub to tinker with the code. The EOSDIS Worldview tool (source) is based on OpenLayers 3, too. |
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Leaflet is an open source, web browser-based and mobile-friendly mapping library written in JavaScript. See the Live Examples (including Geographic, Web Mercator, Arctic, and Antarctic), notes on using Leaflet with GIBS, and clone the GIBS Web Examples from GitHub to tinker with the code. For details on how to configure specific layers available from GIBS, follow the relevant instructions included in the GIBS Layer Configuration Information. |
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Maps created with the Google Maps API, version 3 can include layers from GIBS. See the GIBS Web Examples for sample code. For details on how to configure specific layers available from GIBS, follow the relevant instructions included in the GIBS Layer Configuration Information . |
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Maps created with the Bing Maps AJAX Control, version 7 can include layers from GIBS. See the GIBS Web Examples for sample code. For details on how to configure specific layers available from GIBS, follow the relevant instructions included in the GIBS Layer Configuration Information . |
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Google Earth (Plugin) is a virtual globe that can be embedded on a webpage and manipulated through Javascript. It utilizes the KML interface of TWMS to retrieve data. RequirementsLimitationsGoogle Earth does not have a convenient method of layering maps on top of each other. One can achieve the effect by changing the elevation that the map layers are displayed at, although that sometimes can introduct unwanted artifacts on the display. UsageThe Javascript uses a callback function to load data from a URL. The list of available products can be found here.
ScreenshotsGIBS data displayed in the Google Earth Plugin (As used in PO.DAAC's State of the Ocean when "MODIS True Color" layers are selected) Additional Documentation |
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World Wind is a multi-platform virtual globe developed by NASA that runs in Java. It can load GIBS data through either the KML interface or the TWMS interface. Requirements
Usage (KML)To run the World Wind client with GIBS KML capabilities, load the "KML Viewer" demo application from either the standalone client or the online demo. To load a specific layer, select File | Open URL... and enter a URL for the layer in this format: httphttps://<url to kmlgen.cgi>?layers=<layername>&time=<time> for example, httphttps://gibs.earthdata.nasa.gov/twms/epsg4326/best/kmlgen.cgi?layers=MODIS_Terra_CorrectedReflectance_TrueColor&time=2012-06-21 To enable time adjustment on a particular layer, use the following URL parameter: time=R10/<date>/P1D for example, httphttps://gibs.earthdata.nasa.gov/twms/epsg4326/best/kmlgen.cgi?layers=MODIS_Terra_CorrectedReflectance_TrueColor&time=R10/2012-05-26/P1D Additional documentation is available here. Limitations: The name of the layer has to be known prior to entering the URL. The list of available layers can be found here. Usage (TWMS)To run the World Wind client with TWMS capabilities, load the WMS Layer Manager demo application from either the standalone client or the online demo. In the layers menu, add the TWMS endpoint. This will load the list of layers available from TWMS and selecting a layer will allow it to be shown on the globe. Limitations: World Wind will continue to zoom and try to load images even if they're beyond the depth of the highest resolution tile. When this happens, the images will go blank. In addition, this interface does not allow the selection of variables such as time. Screenshots
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See the Google Earth section on the GIBS GIS Usage page. |
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The iOS client library is a native library written in Objective-C and can be incorporated into any iOS app for the iPod Touch, iPhone, and iPad. It is built upon ArcGIS's iOS client libraries, which provides a MapView and asynchronous tile loading, coupled with a custom TWMS data loader. The library comes with a sample client to display TWMS maps and includes basic manipulations such as presenting data from arbitrary TWMS server, selecting a time-value, and map layer reordering. Requirements
UsageTo use the library, create an AGSMapView object, either programmatically or linked from Interface Builder, and use the following code snippet as an example.
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Additional DocumentationThe ArcGIS iOS documentation can be obtained here. The standard iOS documentation can be viewed here. The iOS library defines 3 classes that are used to load TWMS data: TWMSTiledWebMapService: Instantiated for each TWMS endpoint. TWMSTiledMap: Represents an individual map layer in the TWMS. TWMSTiledMapLayer: A subclass of ArcGIS's map layer to show TWMS data. TWMSTiledWebMapService Properties name: The name of the TWMS as defined in the GetTiledService request. title: The title of the TWMS as defined in the GetTiledService request. abstract: The abstract of the TWMS as defined in the GetTiledService request. tiledMaps: A dictionary where the keys are the name of each map layer and values are the TWMSTiledMap instances. Methods (id)initWithUrl:(NSURL*)url: Loads the TWMS data given by the url to instantiate this class. (NSArray*)listAllTiledMapsByName: Returns a sorted list of map layer names. (void)setTiledMapKeyValue:(NSString*)value forTiledMapKey:(NSString*)key: Assigns variable keys for all TiledMaps in the TWMS server. (NSDictionary*)tiledMapKeyValues: Returns a dictionary of all the keys used in all TiledMaps and the value its currently set to. TWMSTiledMap Properties name: The name of the layer as defined in the GetTiledService request. title: The title of the layer as defined in the GetTiledService request. uuid: A randomly generated unique ID for the layer. Code SnippetsCreate a new TWMSTiledWebMapService using a URL
List all map layers in a TWMS server
Update variables for all TWMS endpoints
Add, reorder, and remove map layers (Provided by ArcGIS's MapView class)
Set map layer transparency (Provided by iOS UIView's transparency settings)
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See the GIBS API documentation for script-level access to GIBS via GDAL. |
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