This project develop components of a polar cyberinfrastructure (CI) to support researchers and users for data discovery and access. The main goal is to provide tools that will enable a better access to polar data and information, hence allowing to spend more time on analysis and research, and significantly less time on discovery and searching. A large-scale web crawler, PolarHub, is developed to continuously mine the Internet to discover dispersed polar data. Beside identifying polar data in major data repositories, PolarHub is also able to bring individual hidden resources forward, hence increasing the discoverability of polar data. Quality and assessment of data resources are analyzed inside of PolarHub, providing a key tool for not only identifying issues but also to connect the research community with optimal data resources.

In the current PolarHub system, seven different types of geospatial data and processing services that are compliant with OGC (Open Geospatial Consortium) are supported in the system. They are: -- OGC Web Map Service (WMS): is a standard protocol for serving (over the Internet)georeferenced map images which a map server generates using data from a GIS database. -- OGC Web Feature Service (WFS): provides an interface allowing requests for geographical features across the web using platform-independent calls. -- OGC Web Coverage Service (WCS): Interface Standard defines Web-based retrieval of coverages; that is, digital geospatial information representing space/time-varying phenomena. -- OGC Web Map Tile Service (WMTS): is a standard protocol for serving pre-rendered georeferenced map tiles over the Internet. -- OGC Sensor Observation Service (SOS): is a web service to query real-time sensor data and sensor data time series and is part of theSensor Web. The offered sensor data comprises descriptions of sensors themselves, which are encoded in the Sensor Model Language (SensorML), and the measured values in the Observations and Measurements (O and M) encoding format. -- OGC Web Processing Service (WPS): Interface Standard provides rules for standardizing how inputs and outputs (requests and responses) for invoking geospatial processing services, such as polygon overlay, as a web service. -- OGC Catalog Service for the Web (CSW): is a standard for exposing a catalogue of geospatial records in XML on the Internet (over HTTP). The catalogue is made up of records that describe geospatial data (e.g. KML), geospatial services (e.g. WMS), and related resources.

PolarHub has three main functions: (1) visualization and metadata viewing of geospatial data services; (2) user-guided real-time data crawling; and (3) data filtering and search from PolarHub data repository.

O Serviço de Cobertura Web (WCS) é definido pelo Open Geospatial Consortium (OGC), de forma a permitir a obtenção de dados geoespaciais sob a forma de coberturas de informação geográfica que representem fenómenos de variação espacial, para que sirvam de representação gráfica ou como dados de entrada para modelos científicos. A norma define três operações básicas: GetCapabilities, DescribeCoverage e GetCoverage.

Um cliente WCS é capaz de baixar dados rasterizados, com a característica única de que o servidor retorna uma imagem que carrega as informações dos atributos incluídos. A integração do serviço WCS icearagon pode ser feita tanto a partir de ambientes Web como a partir de clientes SIG, tanto de software comercial como de software livre.

As seguintes informações estão inicialmente a ser divulgadas através deste serviço WCS: - Modelo digital do terreno (MDT):5 m. - Modelo digital do terreno (MDT):20 m. - Mapa de orientações:20 m. - Mapa de Brincos: 20 m. em graus e percentagem

The ORNL DAAC Spatial Data Access Tool (SDAT) is a suite of Web-based applications that enable users to visualize and download spatial data in user-selected spatial/temporal extents, file formats, and projections. SDAT incorporates Open Geospatial Consortium (OGC) standard Web services, including Web Coverage Service (WCS), Web Map Service (WMS), and Web Feature Service (WFS). The SDAT provides ORNL DAAC-archived data sets and additional relevant data products including agriculture, atmosphere, biosphere, climate indicators, human dimensions, land surface, oceans, terrestrial hydrosphere data types, and related model output data sets.

This is an ArcGIS Server Image Service that provides a three-band false color infrared image of the 2005/2006 National Agricultural Imagery Program (NAIP) orthorectified digital aerial photos of Montana. Services available include: ArcGIS Server Image services, Open Geospatial Consortium, Inc. (OGC) web coverage services (WCS), and OGC web map services (WMS). The image and web coverage services provide users direct access to the native GeoTIFF files and pixel data for geoprocessing and image analysis. The original GeoTIFF files are available by request from the State Library. Connection URLs for OGC services: WCS: https://gisservicemt.gov/arcgis/rest/services/MSDI_Framework/NAIP_2005CIR/ImageServer/WCSServer WMS: https://gisservicemt.gov/arcgis/rest/services/MSDI_Framework/NAIP_2005CIR/ImageServer/WMSServer The 1 meter ground sample distance ortho images were rectified to a horizontal accuracy of within /- 5 meters of reference digital ortho quarter quads (DOQQs) from the National Digital Ortho Program (NDOP). This service is based on 3,977 false color infrared (IR) digital orthorectified photo images of Montana. Each image covers an area of 100 square kilometers (39 square miles) and is approximately 286 megabytes in size. The majority of images were acquired in summer 2005 and the remainder were acquired during summer 2006. The 2006 imagery roughly covers the following counties: Sheridan, Roosevelt, Richland, Dawson, Wibaux, Gallatin, Park, Sweet Grass, Prairie, Custer, Daniels, Fallon, Powder River, Carter, and Broadwater. There is also 2006 data in parts of Rosebud, Big Horn, Carbon, Madison, Meahger, Lewis and Clark, Judith Basin, Valley, McCone and Wheatland Counties. The 2005 aerial photos were collected coincidently with the natural color NAIP images acquired by the Farm Services Agency in support of planning and delivery of USDA programs. A shapefile showing the extent of each image file and the file names is available at https://ftpgeoinfo.msl.mt.gov/Data/Spatial/MSDI/Imagery/2005_NAIP/NAIP_2005_Infrared_Files.zip. This layer also contains a year field to show which images contain 2005 vs 2006 data. Dates of the 2006 images are not known. The image dates for 2005 imagery are given in a shapefile at https://ftpgeoinfo.msl.mt.gov/Data/Spatial/MSDI/Imagery/2005_NAIP/NAIP_2005_Color_Dates.zip Please see https://msl.mt.gov/geoinfo/data/Aerial_Photos/NAIP_2005 for more information on NAIP 2005 and infrared 2006 data from the State Library.

The ORNL DAAC Spatial Data Access Tool (SDAT) is a suite of Web-based applications that enable users to visualize and download spatial data in user-selected spatial/temporal extents, file formats, and projections. SDAT incorporates Open Geospatial Consortium (OGC) standard Web services, including Web Coverage Service (WCS), Web Map Service (WMS), and Web Feature Service (WFS). The SDAT provides ORNL DAAC-archived data sets and additional relevant data products including agriculture, atmosphere, biosphere, climate indicators, human dimensions, land surface, oceans, terrestrial hydrosphere data types, and related model output data sets.

This is an ArcGIS Server Image Service of the 4-band 2013 National Agricultural Imagery Program (NAIP) orthorectified digital aerial photos of Montana. The web services available include: ArcGIS Server Image services, Open Geospatial Consortium, Inc. (OGC) web coverage services (WCS), and OGC web map services (WMS). The image and web coverage services provide users direct access to the native GeoTIFF files and pixel data for geoprocessing and image analysis. Imagery defaults to natural color. To view the imagery as false-color infrared (CIR), select band 4 as the red image, band 1 as the green, and band 2 as the blue. The service is available in Open GIS Consortium (OGC) formats: WCS: https://gisservicemt.gov/arcgis/rest/services/MSDI_Framework/NAIP_2013/ImageServer/WCSServer WMS: https://gisservicemt.gov/arcgis/rest/services/MSDI_Framework/NAIP_2013/ImageServer/WMSServer The data are also available from the State Library in three different formats: They are downloadable as a collection of 698 compressed natural-color MrSID images, each 24 kilometers square. These images are in Montana State Plane coordinates, units meters. The web map for accessing these images is https://montana.maps.arcgis.com/home/webmap/viewer.html?webmap=6564af20b08f4d29b61a5692ee001a2c They are downloadable as a collection of 56 compressed county mosaic (CCM) natural color MrSID images. These data are in UTM coordinates. The FTP folder containing these images is https://ftpgeoinfo.msl.mt.gov/Data/Spatial/MSDI/Imagery/2013_NAIP/UTM_County_Mosaics. They are available from the State Library as a collection 11,776 4-band (near infrared, red, green and blue) TIFF images in UTM coordinates. Each image is about 170 megabytes. The tiling format of the TIFF imagery is based on 3.75 x 3.75 minute quarter-quadrangles with a 300 pixel buffer on all four sides. An ESRI shapefile index showing the dates and times the images were acquired is available at: https://ftpgeoinfo.msl.mt.gov/Data/Spatial/MSDI/Imagery/2013_NAIP/NAIP_2013_Dates.zip. An ESRI shapefile index showing the extent of the individual TIFF image files is available at: https://ftpgeoinfo.msl.mt.gov/Data/Spatial/MSDI/Imagery/2013_NAIP/NAIP_2013_tiff_index.zip. To order TIFF images from the State Library, select the quadrangles you want from the tiff index shapefile and send them to the Library, along with a storage device of sufficient size to hold them and return postage for the device.

A-CAP is a geo-visualization and data download tool developed at the NSIDC Antarctic Glaciological Data Center (AGDC). A-CAP provides access to AGDC data and other Antarctic parameters including glaciology, ice core data, snow accumulation, satellite imagery, digital elevation models (DEMs), sea ice concentration, and many other cryosphere-related measurements. A-CAP is an interactive map interface that allows users to zoom in and out, overlay coastlines, place names, latitude/longitude, and other geographic information, and access data. A-CAP map images and source data are also accessible via the Open Geospatial Consortium (OGC) Web Map Service (WMS), Web Feature Service (WFS), and Web Coverage Service (WCS).

The National Snow and Ice Data Center (NSIDC) Antarctic Cryosphere Access Portal (A-CAP) is a map server that provides data and information pertinent to the frozen regions of the Antarctic ice sheet and the Southern Ocean, including monthly climatologies of sea ice extent and concentration, ice sheet elevation and accumulation, satellite imagery, and more. In addition to providing map images and source data through Open Geospatial Consortium, Inc. (OGC) protocols--Web Map Service (WMS), Web Feature Service (WFS), and Web Coverage Service (WCS)--a dynamic Web interface for exploring these data is also available at http://nsidc.org/agdc/acap/. If you have questions, comments or suggestions, please contact NSIDC User Services at +1.303.492.6199 or nsidc@nsidc.org.

Surface current data measured by the CNR-ISMAR HF radar network are made available in graphical format for the last 48 hours and in real time and delayed mode via a THREDDS catalog which provides metadata and data access. The web site gives information on HF radar technology, sites position and operational parameters, and links to the THREDDS catalog. The catalog offers different remote-data-access protocols such as Open-source Project for a Network Data Access Protocol (OpenDaP), Web Coverage Service (WCS), Web Map Service (WMS) (OGS standards), as well as pure HTTP or NetCDF-Subsetter. They allow for metadata interrogation and data download (even sub-setting the dataset in terms of time and space) while embedded clients, such as GODIVA2, NetCDF-JavaToolsUI and Integrated Data Viewer, grant real-time data visualization directly via browser and allow for navigating within the plotted maps, saving images, exporting-importing on Google Earth, generating animations in selected time intervals. The data on the THREDDS catalog are organized in two folders, collecting the hourly current files of the last five days and grouping all the historical data. The two folders are accessible both in aggregated and in non-aggregated configuration.

The data set consists of maps of radial and total velocity of the sea water surface current collected by the HF radars within the Italian Coastal Radar Network established in the framework of the Italian flagship project RITMARE. Surface ocean velocities estimated by HF Radar are representative of the upper 0.3-2.5 meters of the ocean. The radar sites are operated according to Quality Assessment procedures and data are processed for Quality Control. Data access tools are compliant to Open Geospatial Consortium (OGC), Climate and Forecast (CF) convention and INSPIRE directive. The use of netCDF format allows an easy implementation of all the open source services developed by UNIDATA.

This is an ArcGIS Server Image Service of the 4-band 2011 National Agricultural Imagery Program (NAIP) orthorectified digital aerial photos of Montana. The one-meter ground sample distance (GSD) ortho images were rectified to a horizontal accuracy that matches within six meters of photo-identifiable ground control points, which are used during image inspection. NAIP imagery may contain as much as 10% cloud cover per tile. The data were created for the U.S. Farm Services Agency National Agricultural Imagery Program (https://www.fsa.usda.gov/programs-and-services/aerial-photography/index) by Surdex Corporation. A version of the data in Montana State Plane Coordinates (NAD83 High Accuracy Reference Network, meters) was provided to the State Library as a collection of seamless 4-band GeoTIFF images. The web services available include: ArcGIS Server Image services, Open Geospatial Consortium, Inc. (OGC) web coverage services (WCS), and OGC web map services (WMS). The image and web coverage services provide users direct access to the native GeoTIFF files and pixel data for geoprocessing and image analysis. The original GeoTIFF files are available by request from the State Library. An Esri shapefile of the dates the images were collected is available at https://ftpgeoinfo.msl.mt.gov/Data/Spatial/MSDI/Imagery/2011_NAIP/24_km_tiles/00_NAIP_2011_Dates.zip Imagery defaults to natural color. To view the imagery as false-color infrared (CIR), select band 4 as the red image, band 1 as the green, and band 2 as the blue. Connection URLs for OGS services: WCS: https://gisservicemt.gov/arcgis/rest/services/MSDI_Framework/NAIP_2011/ImageServer/WCSServer WMS: https://gisservicemt.gov/arcgis/rest/services/MSDI_Framework/NAIP_2011/ImageServer/WMSServer The data are also available for download in MrSID format from the State Library at: https://montana.maps.arcgis.com/home/webmap/viewer.html?webmap=3e7d65205e23415e825c6e7936f21e51

This is an ArcGIS Server Image Service that provides a four-band image of the 2009 National Agricultural Imagery Program (NAIP) orthorectified digital aerial photos of Montana. Imagery defaults to natural color. To view the imagery as false-color infrared (CIR), select band 4 as the red image, band 1 as the green, and band 2 as the blue. The 1 meter ground sample distance (GSD) ortho images were rectified to a horizontal accuracy of within /- 5 meters of reference digital ortho quarter quads (DOQQs) from the National Digital Ortho Program (NDOP). The data were provided by the U.S. Farm Services Agency National Agricultural Imagery Program to the State of Montana as multispectral 4-band GeoTIFF files tiled as 3.75' x 3.75' quarter quadrangles formatted to the UTM coordinate system using NAD83. An Esri shapefile of the dates the images were collected is available at https://ftpgeoinfo.msl.mt.gov/Data/Spatial/MSDI/Imagery/2009_NAIP/Naip_2009_Dates.zipServices available include: ArcGIS Server Image services, Open Geospatial Consortium, Inc. (OGC) web coverage services (WCS), and OGC web map services (WMS). The image and web coverage services provide users direct access to the native GeoTIFF files and pixel data for geoprocessing and image analysis. The original GeoTIFF files are available by request from the State Library. Connection URLs for OGC services: WCS: https://gisservicemt.gov/arcgis/rest/services/MSDI_Framework/NAIP_2009/ImageServer/WCSServer WMS: https://gisservicemt.gov/arcgis/rest/services/MSDI_Framework/NAIP_2009/ImageServer/WMSServer The State Library also provides the 2009 NAIP as downloadable natural-color Compressed County Mosaics (CCMs) and as 12-kilometer blocks from the Montana State Library at: https://montana.maps.arcgis.com/home/webmap/viewer.html?webmap=fbffcee9488a40d2825d2f049b5c7656