90 datasets found
  1. Data from: Leaf Area Index Maps at 30-m Resolution, Selected Sites, Canada

    • s.cnmilf.com
    • datasets.ai
    • +7more
    Updated Jun 28, 2025
    + more versions
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    ORNL_DAAC (2025). Leaf Area Index Maps at 30-m Resolution, Selected Sites, Canada [Dataset]. https://s.cnmilf.com/user74170196/https/catalog.data.gov/dataset/leaf-area-index-maps-at-30-m-resolution-selected-sites-canada-6b55a
    Explore at:
    Dataset updated
    Jun 28, 2025
    Dataset provided by
    Oak Ridge National Laboratory Distributed Active Archive Center
    Area covered
    Canada
    Description

    This data set provides local LAI maps for the selected measured sites in Canada. These derived maps may also be useful for validating other LAI maps over these same sites given that the areas are protected from disturbance. The maps should be used for the given period of validity. The LAI data are suitable for use in modeling the carbon, water, energy, energy and trace gas exchange between the land surface and the atmosphere at regional scales. The data set may also be useful for monitoring changes in the land surface.The Leaf Area Index (LAI) maps are at 30-m resolution for the selected sites. LAI is defined here as half the total (all-sided) live foliage area per unit horizontal projected ground surface area. Overstory LAI corresponds to all tree foliage except for treeless areas where it corresponds to total foliage. The algorithms were developed from ground measurements and Landsat TM and ETM+ images (Fernandes et. al., 2003). A mask was developed using the Landsat ETM+/TM5 image and available land cover map to identify only those areas with land cover belonging to the sample land cover classes and with Landsat ETM+/TM5 spectral reflectance values that fell within the convex hull of the spectral reflectance values over the plots. LAI was mapped within the masked region using the Landsat ETM+/TM5 image and the developed transfer function. The final LAI map was scaled by a factor of 20 (offset 0). The LAI maps are in Tagged Image File Format (TIFF).

  2. A spatial index of all map products created by this department - Dataset -...

    • data.nt.gov.au
    Updated Dec 10, 2019
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    nt.gov.au (2019). A spatial index of all map products created by this department - Dataset - NTG Open Data Portal [Dataset]. https://data.nt.gov.au/dataset/a-spatial-index-of-all-map-products-created-by-this-department
    Explore at:
    Dataset updated
    Dec 10, 2019
    Dataset provided by
    Northern Territory Governmenthttp://nt.gov.au/
    License

    Attribution 4.0 (CC BY 4.0)https://creativecommons.org/licenses/by/4.0/
    License information was derived automatically

    Description

    This spatial polygon dataset displays the footprint location for each map product created by this department. This index provides access to download map products as a PDF. The index is regularly updated. Each record in the index dataset contains details for the map including; - link to download the map as a PDF - map name, map description, coverage location area and date created - link to the project metadata record All map products can be viewed and downloaded as a PDF via NR Maps. https://nrmaps.nt.gov.au/nrmaps.html See Layers: Map Products \ All Map Products. - Tick the layer to display the map footprint area in the map screen. - Right mouse click to make the layer active. - Select a feature on the map screen in your area of interest or; - Use the search panel to enter details and filter the records. - Review map details in the data panel (below the map screen) to download a map product (PDF).

  3. Map based index (GeoIndex) old series 1 inch geological maps

    • dtechtive.com
    • cloud.csiss.gmu.edu
    • +4more
    html
    Updated Jul 8, 2020
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    British Geological Survey (2020). Map based index (GeoIndex) old series 1 inch geological maps [Dataset]. https://dtechtive.com/datasets/39809
    Explore at:
    html(null MB)Available download formats
    Dataset updated
    Jul 8, 2020
    Dataset provided by
    British Geological Surveyhttps://www.bgs.ac.uk/
    Area covered
    Scotland
    Description

    This layer of the map based index (GeoIndex) shows the availability of 1:63360 scale geological maps. The maps are available for most of England and Wales and show early geological mapping covering the OS Old Series one inch map sheet areas.

  4. Map based index (GeoIndex) classical areas geological maps 1:25k

    • find.data.gov.scot
    • dtechtive.com
    • +2more
    html
    Updated Jul 8, 2020
    + more versions
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    British Geological Survey (2020). Map based index (GeoIndex) classical areas geological maps 1:25k [Dataset]. https://find.data.gov.scot/datasets/39820
    Explore at:
    html(null MB)Available download formats
    Dataset updated
    Jul 8, 2020
    Dataset provided by
    British Geological Surveyhttps://www.bgs.ac.uk/
    Area covered
    Scotland
    Description

    This layer of the GeoIndex shows the availability of 1:25000 scale Classical Areas Geological Maps. The maps themselves show the occurrence, nature and stratigraphic age of rocks. They are available for selected areas of outstanding geological interest in the United Kingdom, and in a number of versions (Solid, or Solid and Drift combined, Bedrock or Superficial). Maps are normally available in both flat and folded format. 1:25000 scale maps are also available for the Channel Islands. To order maps, take note of the map name and use the BGS Internet Shop.

  5. Map based index (GeoIndex) digital geological map availability 1:50k

    • data.europa.eu
    • cloud.csiss.gmu.edu
    • +4more
    unknown
    Updated Oct 30, 2021
    + more versions
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    British Geological Survey (BGS) (2021). Map based index (GeoIndex) digital geological map availability 1:50k [Dataset]. https://data.europa.eu/data/datasets/map-based-index-geoindex-digital-geological-map-availability-1-50k?locale=hu
    Explore at:
    unknownAvailable download formats
    Dataset updated
    Oct 30, 2021
    Dataset provided by
    British Geological Surveyhttps://www.bgs.ac.uk/
    Authors
    British Geological Survey (BGS)
    Description

    This layer of the GeoIndex shows the location of available 1:50000 scale digital geological maps within Great Britain. The Digital Geological Map of Great Britain project (DiGMapGB) has prepared 1:625 000, 1:250 000 and 1:50 000 scale datasets for England, Wales and Scotland. The datasets themselves are available as vector data in a variety of formats in which they are structured into themes primarily for use in geographical information systems (GIS) where they can be integrated with other types of spatial data for analysis and problem solving in many earth-science-related issues. Most of the 1:50 000 scale geological maps for England & Wales and for Scotland are now available digitally as part of the DiGMapGB-50 dataset. It integrates geological information from a variety of sources. These include recent digital maps, older 'paper only' maps, and desk compilations for sheets with no published maps.

  6. Map based index (GeoIndex) technical reports

    • metadata.bgs.ac.uk
    • cloud.csiss.gmu.edu
    • +7more
    html
    Updated 2000
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    British Geological Survey (2000). Map based index (GeoIndex) technical reports [Dataset]. https://metadata.bgs.ac.uk/geonetwork/geonetwork/api/records/9df8df53-2a7c-37a8-e044-0003ba9b0d98
    Explore at:
    htmlAvailable download formats
    Dataset updated
    2000
    Dataset authored and provided by
    British Geological Surveyhttps://www.bgs.ac.uk/
    License

    http://inspire.ec.europa.eu/metadata-codelist/LimitationsOnPublicAccess/INSPIRE_Directive_Article13_1dhttp://inspire.ec.europa.eu/metadata-codelist/LimitationsOnPublicAccess/INSPIRE_Directive_Article13_1d

    Area covered
    Description

    This layer of the map based index (GeoIndex) provides an index to a sub set of the BGS Report Series. The reports themselves describe the local geology and are designed to be read in conjunction with their complementary map or maps. Additional information such as hydrogeology, engineering geology, geological hazards, economic minerals and made and worked ground or other specialist topics of local interest may be included.

  7. c

    ckanext-mapsearch

    • catalog.civicdataecosystem.org
    Updated Jun 4, 2025
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    (2025). ckanext-mapsearch [Dataset]. https://catalog.civicdataecosystem.org/dataset/ckanext-mapsearch
    Explore at:
    Dataset updated
    Jun 4, 2025
    Description

    The Mapsearch extension enhances CKAN's spatial search capabilities by introducing scale-awareness. This extension, designed to work alongside ckanext-spatial, allows users to view the number of results at different zoom levels on a map, making it easier to find relevant geospatial datasets. The core functionality relies on pre-indexing data with an additional area field, enabling scale-dependent search result aggregation. Key Features: Scale-Aware Search: Displays the number of datasets at five different scales for a given area of interest, providing a more granular search experience. Map-Centered Interface: Integrates directly with the CKAN spatial extension to offer a map-based search interface. Solr Integration: Leverages Solr's spatial capabilities, requiring Solr 3.1 or higher, and uses an extra field in the Solr index for storing area information. Configurable Map Extent: Allows administrators to set the initial map extent for the search interface. Test Suite: Includes basic Selenium WebDriver tests to facilitate quality assurance and extension verification. Technical Integration: The Mapsearch extension integrates with CKAN by adding a plugin that depends on ckanext-spatial. Installation order in the CKAN .ini configuration file is critical, requiring mapsearch to be listed after spatial_query in the plugins setting. It also needs an extra field in the Solr schema.xml configured for proper indexing. Benefits & Impact: By offering scale-aware search, the Mapsearch extension improves geospatial data discovery within CKAN. Users can quickly assess data availability at different zoom levels, allowing them to refine their searches and identify relevant datasets more easily. This extension contributes to more efficient and effective utilization of spatial data resources within a CKAN-powered data portal.

  8. Map based index (GeoIndex) county maps 6inch

    • metadata.bgs.ac.uk
    • cloud.csiss.gmu.edu
    • +4more
    html
    Updated 2000
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    British Geological Survey (2000). Map based index (GeoIndex) county maps 6inch [Dataset]. https://metadata.bgs.ac.uk/geonetwork/srv/api/records/9df8df53-2a9d-37a8-e044-0003ba9b0d98
    Explore at:
    htmlAvailable download formats
    Dataset updated
    2000
    Dataset authored and provided by
    British Geological Surveyhttps://www.bgs.ac.uk/
    License

    http://inspire.ec.europa.eu/metadata-codelist/LimitationsOnPublicAccess/INSPIRE_Directive_Article13_1dhttp://inspire.ec.europa.eu/metadata-codelist/LimitationsOnPublicAccess/INSPIRE_Directive_Article13_1d

    Area covered
    Description

    The index shows the availability of county series geological maps, 1:10560 scale. The maps themselves were produced on OS County Series sheets between approximately 1860 and 1960. The list indicates whether the map has been revised or re-surveyed and gives details of any later versions that have been produced. It is advisable to discuss your requirements before ordering or travelling to view these maps.

  9. d

    1:1 Million Scale Topographic Map Index Web Map

    • data.gov.au
    html
    Updated Oct 4, 2019
    + more versions
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    Environmental Geoscience Division (2019). 1:1 Million Scale Topographic Map Index Web Map [Dataset]. https://data.gov.au/dataset/ds-ga-d73532e1-7017-48c7-839f-dd86212472b2
    Explore at:
    htmlAvailable download formats
    Dataset updated
    Oct 4, 2019
    Dataset provided by
    Environmental Geoscience Division
    License

    Attribution 4.0 (CC BY 4.0)https://creativecommons.org/licenses/by/4.0/
    License information was derived automatically

    Description

    Online map index of 1:1 million scale topographic map sheets covering Australia. The application allows users to search, select and download 1 million scale topographic maps with redirection to the …Show full descriptionOnline map index of 1:1 million scale topographic map sheets covering Australia. The application allows users to search, select and download 1 million scale topographic maps with redirection to the relevant eCat record. This is available as an interactive web map.

  10. Map based index (GeoIndex) Aquifer Vulnerability Maps

    • data.europa.eu
    • metadata.bgs.ac.uk
    • +3more
    unknown
    Updated Oct 11, 2021
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    British Geological Survey (BGS) (2021). Map based index (GeoIndex) Aquifer Vulnerability Maps [Dataset]. https://data.europa.eu/data/datasets/map-based-index-geoindex-aquifer-vulnerability-maps1
    Explore at:
    unknownAvailable download formats
    Dataset updated
    Oct 11, 2021
    Dataset provided by
    British Geological Surveyhttps://www.bgs.ac.uk/
    Authors
    British Geological Survey (BGS)
    Description

    This layer of the map based index (GeoIndex) shows where aquifer vulnerability maps are available for England and Wales. These maps identify areas in which the groundwater resources require protection from potentially polluting activities. The maps are designed to be used by planners, developers, consultants and regulatory bodies to ensure that developments conform to the Policy and Practice of the Environment Agency for the protection of Groundwater. The Soil Survey, Land Research Centre and the British Geological Survey were commissioned by the Environment Agency to prepare 53 groundwater vulnerability maps at 1:100,000 scale. Currently we are unable to provide scanned copies of these maps due to Copyright restrictions. Please note that these maps are based on data from the late 1980's and early 1990's. More up-to-date digital data may now be available from the Environment Agency.

  11. d

    Scale 1:5000 Index Map Frame_119th Belt

    • data.gov.tw
    shp
    Updated Jan 22, 2013
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    Ministry of the Interior Land Surveying and Mapping Center (2013). Scale 1:5000 Index Map Frame_119th Belt [Dataset]. https://data.gov.tw/en/datasets/115925
    Explore at:
    shpAvailable download formats
    Dataset updated
    Jan 22, 2013
    Dataset authored and provided by
    Ministry of the Interior Land Surveying and Mapping Center
    License

    https://data.gov.tw/licensehttps://data.gov.tw/license

    Description

    Scale 1:5000 reference index map frame_119 bands, suitable for "Taiwan General Electronic Map", "National Land Use Survey" and "Orthophoto" map overlay query.

  12. Map based index (GeoIndex) fossil specimens

    • dtechtive.com
    • metadata.bgs.ac.uk
    • +4more
    html
    Updated Jul 8, 2020
    + more versions
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    British Geological Survey (2020). Map based index (GeoIndex) fossil specimens [Dataset]. https://dtechtive.com/datasets/40861
    Explore at:
    html(null MB)Available download formats
    Dataset updated
    Jul 8, 2020
    Dataset provided by
    British Geological Surveyhttps://www.bgs.ac.uk/
    Area covered
    Scotland
    Description

    This layer of the GeoIndex shows the localities for which details of identified fossil specimens in the BGS Biostratigraphy Museum are databased. Only Ordovician and Silurian specimens listed currently. Samples and taxonomic identifications will be listed and will in future be able to be queried using the query-by-attribute tool to the right of the map. See also Fossil Localities. Material is available for inspection on application by e-mail; it is free for academic research but is charged for commercial work. Specimens are sometimes available for loan to bona fide academics.

  13. Map based index (GeoIndex) 1:10000 Series Geological Maps

    • dtechtive.com
    • find.data.gov.scot
    html
    Updated Jul 8, 2020
    + more versions
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    British Geological Survey (2020). Map based index (GeoIndex) 1:10000 Series Geological Maps [Dataset]. https://dtechtive.com/datasets/39981
    Explore at:
    html(null MB)Available download formats
    Dataset updated
    Jul 8, 2020
    Dataset provided by
    British Geological Surveyhttps://www.bgs.ac.uk/
    Area covered
    Scotland
    Description

    This layer of the map based index (GeoIndex) shows the location of available 1:10000 or 1:10560 series geological maps. Since the 1960s the standard large scale map for recording geological information has been the Ordnance Survey (OS) quarter sheet, covering a 5km by 5km area. The maps themselves are supplied in different formats depending on their age and the method of compliation or reproduction used. Only the latest and most up-to-date version is listed.

  14. d

    Data from: Geologic Map Index of Alaska

    • catalog.data.gov
    • s.cnmilf.com
    • +1more
    Updated Jul 5, 2023
    + more versions
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    Alaska Division of Geological & Geophysical Surveys (Point of Contact) (2023). Geologic Map Index of Alaska [Dataset]. https://catalog.data.gov/dataset/geologic-map-index-of-alaska1
    Explore at:
    Dataset updated
    Jul 5, 2023
    Dataset provided by
    Alaska Division of Geological & Geophysical Surveys (Point of Contact)
    Area covered
    Alaska
    Description

    The Geologic Map Index of Alaska (Map Index) is a GIS web feature service paired with an interactive web map application that provides access to an actively growing geographic index of geology-related maps of Alaska and adjacent areas. This online research tool provides the locations and outlines of most DGGS and U.S. Geological Survey (USGS) geologic maps of Alaska in a single, interactive web application. It allows searches of the map database by geographic area of interest, keywords, publishing agency, dates, and other criteria. The search results link DGGS's comprehensive, multi-agency publications database, where users can view and download publications for free. Map Index provides access to traditional geologic maps and sample location, geologic hazards, and geologic resources maps. In addition, DGGS plans to add outlines and data to the application for new and remaining geologic maps published by DGGS, USGS, U.S. Bureau of Mines, and U.S. Bureau of Land Management. Reports without maps can be accessed through DGGS's comprehensive publications database, .

  15. Map based index (GeoIndex) hydrogeological maps

    • data.europa.eu
    • cloud.csiss.gmu.edu
    • +5more
    unknown
    Updated Dec 25, 2021
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    British Geological Survey (BGS) (2021). Map based index (GeoIndex) hydrogeological maps [Dataset]. https://data.europa.eu/data/datasets/map-based-index-geoindex-hydrogeological-maps1?locale=el
    Explore at:
    unknownAvailable download formats
    Dataset updated
    Dec 25, 2021
    Dataset provided by
    British Geological Surveyhttps://www.bgs.ac.uk/
    Authors
    British Geological Survey (BGS)
    Description

    This layer of the map based index (GeoIndex) shows the location of available Hydrogeological Maps which have been published at various scales, covering areas ranging in size from the whole of England and Wales, Northern Ireland and to Jersey. They display information on surface water features, the three dimensional geometry of aquifers, groundwater levels, abstractions and quality including saline intrusion in varying amounts of detail.

  16. Map based index (GeoIndex) geological memoirs

    • find.data.gov.scot
    • cloud.csiss.gmu.edu
    • +5more
    html
    Updated Jul 8, 2020
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    British Geological Survey (2020). Map based index (GeoIndex) geological memoirs [Dataset]. https://find.data.gov.scot/datasets/39815
    Explore at:
    html(null MB)Available download formats
    Dataset updated
    Jul 8, 2020
    Dataset provided by
    British Geological Surveyhttps://www.bgs.ac.uk/
    Area covered
    Scotland
    Description

    This layer of the map based index (GeoIndex) shows areas covered by explanatory sheet Memoirs, along with basic information such as memoir title and publication date. The memoirs themselves,compiled by BGS geologists, date from the late 1890s to present day and provide a comprehensive and detailed account of all aspects of the geology of the areas covered by the 1:50,000 (and 1:63,360) map series. Some memoirs may cover more than one geological sheet area and a few cover key geological themes (eg Jurassic rocks) across a large region. Sheet Descriptions are fully colour-illustrated, shortened accounts of the geology that are available for some of the newer published geological sheets.

  17. w

    Vicmap Topographic 1:100 000 map index

    • data.wu.ac.at
    wms
    Updated Jul 20, 2018
    + more versions
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    Department of Environment, Land, Water & Planning (2018). Vicmap Topographic 1:100 000 map index [Dataset]. https://data.wu.ac.at/schema/www_data_vic_gov_au/ZWVhZGRlZDQtNGNmNi00YWYwLTlhNTYtNjZkNjliMjNmYmEy
    Explore at:
    wmsAvailable download formats
    Dataset updated
    Jul 20, 2018
    Dataset provided by
    Department of Environment, Land, Water & Planning
    License

    Attribution 4.0 (CC BY 4.0)https://creativecommons.org/licenses/by/4.0/
    License information was derived automatically

    Area covered
    0696066f214a090c918faed4b0e78edf6ea170f2
    Description

    The original dataset has been clipped to suit its use in the context of Victoria and adjoining areas. It is used for the generation of Vicmap Topographic 1;100 000 and for land channel interactive map search. Vicmap Topographic 1:100 000 topographic maps are available internally as GeoPDFs at http://services.land.vic.gov.au:8080/dseintranet/dsetopomaps.jsp

  18. Map based index (GeoIndex) local geophysical surveys, survey lines and...

    • find.data.gov.scot
    • cloud.csiss.gmu.edu
    • +1more
    html
    Updated Jul 8, 2020
    + more versions
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    British Geological Survey (2020). Map based index (GeoIndex) local geophysical surveys, survey lines and survey points [Dataset]. https://find.data.gov.scot/datasets/39818
    Explore at:
    html(null MB)Available download formats
    Dataset updated
    Jul 8, 2020
    Dataset provided by
    British Geological Surveyhttps://www.bgs.ac.uk/
    Area covered
    Scotland
    Description

    An index to over 600 ground geophysical surveys carried out in the UK for a variety of projects. A large number of these surveys were done in conjunction with the DTI Mineral Reconnaissance Programme in the 1970's and 80's, and many others were carried out at the request of BGS field mapping groups. Information held describes the survey objective, location of measurements, geophysical methods and equipment used, reports and publications, storage locations of data and results (for analogue and digital data), dates and personnel. There are two datasets; one shows the outline of the survey areas, and the other shows the actual survey lines within each area.

  19. w

    Printed Topographic Map Index 100K/250K

    • data.wu.ac.at
    • datadiscoverystudio.org
    html, pdf
    Updated Jun 26, 2018
    + more versions
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    (2018). Printed Topographic Map Index 100K/250K [Dataset]. https://data.wu.ac.at/schema/data_gov_au/NDE5NTdhNDgtZDE4Yy00OTc0LWI5MGEtNDUxZTAzNzJmNDYx
    Explore at:
    pdf, htmlAvailable download formats
    Dataset updated
    Jun 26, 2018
    License

    Attribution 4.0 (CC BY 4.0)https://creativecommons.org/licenses/by/4.0/
    License information was derived automatically

    Area covered
    9720ae48684969b0cbdecc2cb101608b78ec9113
    Description

    The two versions of the printed Topographic Map Index are: -the 1:100 000 / 1:250 000 Topographic Map Index -the 1:50 000 Topographic Map Index

    Topographic map indexes are also available as digital data. Maps are listed by name on the back of the index. The 1:50 000 Index also lists availability of Orthophoto Map (OPM) and Topographic Line Map (TLM) for available 1:50 000 maps.

    Both indexes are available in printed form FREE from your nearest topographic map retailer or from the Geoscience Australia Sales Centre. You can also download PDFs of each index.

    Note: To print these PDFs at 100% requires an A0 printer. They are best for viewing on-screen. For new maps which may have been released after these indexes were published, please refer to the new releases page or use the Product Search tool.

    Product Specifications

    Coverage: Australia Currency: 2013 (PDF); 2013 (data) Coordinates: Geographical Datum: GDA94 Format: PDF ; Paper copy Medium: 2004 GIS Data Free online, free folded / download index. Forward Program: Updated annually

  20. Map based index (GeoIndex) regional airborne magnetic surveys and flight...

    • finddatagovscot.dtechtive.com
    • cloud.csiss.gmu.edu
    • +6more
    html
    Updated Jul 8, 2020
    + more versions
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    British Geological Survey (2020). Map based index (GeoIndex) regional airborne magnetic surveys and flight lines [Dataset]. https://finddatagovscot.dtechtive.com/datasets/40934
    Explore at:
    html(null MB)Available download formats
    Dataset updated
    Jul 8, 2020
    Dataset provided by
    British Geological Surveyhttps://www.bgs.ac.uk/
    Area covered
    Scotland
    Description

    The surveys shown on the map based index (GeoIndex) include; Analogue airborne magnetic surveys of Great Britain for the Geological Survey (GSGB), commercial analogue survey of North Sea by Aeroservices Inc, subsequently digitised by BGS, commercial digital (+ one analogue) surveys off NW/N/NE of Britain by Huntings Geology and Geophysics, purchased outright by BGS and Local surveys, digital and analogue aeromagnetic (+ other methods) surveys for BGS and commercial companies.

Share
FacebookFacebook
TwitterTwitter
Email
Click to copy link
Link copied
Close
Cite
ORNL_DAAC (2025). Leaf Area Index Maps at 30-m Resolution, Selected Sites, Canada [Dataset]. https://s.cnmilf.com/user74170196/https/catalog.data.gov/dataset/leaf-area-index-maps-at-30-m-resolution-selected-sites-canada-6b55a
Organization logo

Data from: Leaf Area Index Maps at 30-m Resolution, Selected Sites, Canada

Related Article
Explore at:
Dataset updated
Jun 28, 2025
Dataset provided by
Oak Ridge National Laboratory Distributed Active Archive Center
Area covered
Canada
Description

This data set provides local LAI maps for the selected measured sites in Canada. These derived maps may also be useful for validating other LAI maps over these same sites given that the areas are protected from disturbance. The maps should be used for the given period of validity. The LAI data are suitable for use in modeling the carbon, water, energy, energy and trace gas exchange between the land surface and the atmosphere at regional scales. The data set may also be useful for monitoring changes in the land surface.The Leaf Area Index (LAI) maps are at 30-m resolution for the selected sites. LAI is defined here as half the total (all-sided) live foliage area per unit horizontal projected ground surface area. Overstory LAI corresponds to all tree foliage except for treeless areas where it corresponds to total foliage. The algorithms were developed from ground measurements and Landsat TM and ETM+ images (Fernandes et. al., 2003). A mask was developed using the Landsat ETM+/TM5 image and available land cover map to identify only those areas with land cover belonging to the sample land cover classes and with Landsat ETM+/TM5 spectral reflectance values that fell within the convex hull of the spectral reflectance values over the plots. LAI was mapped within the masked region using the Landsat ETM+/TM5 image and the developed transfer function. The final LAI map was scaled by a factor of 20 (offset 0). The LAI maps are in Tagged Image File Format (TIFF).

Search
Clear search
Close search
Google apps
Main menu