Identification_Information: Citation: Citation_Information: Originator: de Sherbinin, A., M. Levy, S. Adamo, K. MacManus, G. Yetman, V. Mara, L. Razafindrazay, B. Goodrich, T. Srebotnjak, C. Aichele, and L. Pistolesi Publication_Date: 20150918 Title: Global Estimated Net Migration Grids by Decade: 1970-2000 Edition: 1.00 Geospatial_Data_Presentation_Form: raster, map, map service Publication_Information: Publication_Place: Palisades, NY Publisher: NASA Socioeconomic Data and Applications Center (SEDAC) Online_Linkage: https://doi.org/10.7927/H4319SVC Larger_Work_Citation: Citation_Information: Originator: de Sherbinin, A., M. Levy, S. Adamo, K. MacManus, G. Yetman, V. Mara, L. Razafindrazay, B. Goodrich, T. Srebotnjak, C. Aichele, and L. Pistolesi Publication_Date: 20121106 Title: Migration and Risk: Net Migration in Marginal Ecosystems and Hazardous Areas Geospatial_Data_Presentation_Form: journal article Series_Information: Series_Name: Environmental Research Letters Issue_Identification: 7(4): 045602 Online_Linkage: http://iopscience.iop.org/1748-9326/7/4/045602 Description: Abstract: The Global Estimated Net Migration by Decade: 1970-2000 data set provides estimates of net migration over the three decades from 1970 to 2000. Because of the lack of globally consistent data on migration, indirect estimation methods were used. The authors relied on a combination of data on spatial population distribution for four time slices (1970, 1980, 1990, and 2000) and subnational rates of natural increase in order to derive estimates of net migration on a 30 arc-second (~1km) grid cell basis. Net migration was estimated by subtracting the population in time period 2 from the population in time period 1, and then subtracting the natural increase (births minus deaths). The residual was considered to be net migration (in-migrants minus out-migrants). The authors ran 13 geospatial net migration estimation models based on outputs from the same number of imputation runs for urban and rural rates of natural increase.This data set represents the average of those runs. These data are reliable at broad scales of analysis (e.g. ecosystems or regions), but are generally not reliable for local level analyses. The data were produced for the United Kingdom Foresight project on Migration and Global Environmental Change. Purpose: To provide estimates of net-migration (in-migration minus out-migration) per one-kilometer grid cell on a decadal basis for the 1970s, 1980s, and 1990s. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 19700101 Ending_Date: 20001231 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -180.000000 East_Bounding_Coordinate: 180.000000 North_Bounding_Coordinate: 83.633333 South_Bounding_Coordinate: -55.766667 Keywords: Theme: Theme_Keyword_Thesaurus: SEDAC Theme Theme_Keyword: Conservation Theme_Keyword: Land Use Theme_Keyword: Population Theme_Keyword: Urban Theme: Theme_Keyword_Thesaurus: Data Granularity Theme_Keyword: Country Theme_Keyword: Global Theme: Theme_Keyword_Thesaurus: ISO Topic Theme_Keyword: Society Theme: Theme_Keyword_Thesaurus: GCMD Science Keywords, Version 8.6 Theme_Keyword: EARTH SCIENCE > HUMAN DIMENSIONS > POPULATION > POPULATION DISTRIBUTION Place: Place_Keyword_Thesaurus: CIESIN Location Terms, Version 3.1 Place_Keyword: Global Access_Constraints: None Use_Constraints: Users are free to use, copy, distribute, transmit, and adapt the work for commercial and non-commercial purposes, without restriction, as long as clear attribution of the source is provided. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: NASA Socioeconomic Data and Applications Center (SEDAC) Contact_Address: Address_Type: mailing and physical address Address: CIESIN, Columbia University, 61 Route 9W, P.O. Box 1000 City: Palisades State_or_Province: New York Postal_Code: 10964 Country: USA Contact_Voice_Telephone: +1 845-365-8920 Contact_Facsimile_Telephone: +1 845-365-8922 Contact_Electronic_Mail_Address: ciesin.info@ciesin.columbia.edu Browse_Graphic: Browse_Graphic_File_Name: https://sedac.ciesin.columbia.edu/downloads/maps/popdynamics/popdynamics-global-est-net-migration-grids-1970-2000/net-migration-africa-1990-2000-thumbnail.jpg Browse_Graphic_File_Description: Net Migration (1990-2000): Africa Browse_Graphic_File_Type: JPEG Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Grid Cell Row_Count: 43200 Column_Count: 1672 Vertical_Count: 1 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.008333 Longitude_Resolution: 0.008333 Geographic_Coordinate_Units: Decimal degrees Geodetic_Model: Horizontal_Datum_Name: WGS84 Ellipsoid_Name: WGS84 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257224 Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: NASA Socioeconomic Data and Applications Center (SEDAC) Contact_Address: Address_Type: mailing and physical address Address: CIESIN, Columbia University, 61 Route 9W, P.O. Box 1000 City: Palisades State_or_Province: New York Postal_Code: 10964 Country: USA Contact_Voice_Telephone: +1 845-365-8920 Contact_Facsimile_Telephone: +1 845-365-8922 Contact_Electronic_Mail_Address: ciesin.info@ciesin.columbia.edu Resource_Description: CIESIN_SEDAC_PD_NETMIG_1970_2000 Distribution_Liability: CIESIN follows procedures designed to ensure that data disseminated by CIESIN are of reasonable quality. If, despite these procedures, users encounter apparent errors or misstatements in the data, they should contact SEDAC User Services at +1 845-365-8920 or via email at ciesin.info@ciesin.columbia.edu. Neither CIESIN nor NASA verifies or guarantees the accuracy, reliability, or completeness of any data provided. CIESIN provides this data without warranty of any kind whatsoever, either expressed or implied. CIESIN shall not be liable for incidental, consequential, or special damages arising out of the use of any data provided by CIESIN. Standard_Order_Process: Fees: 0 Ordering_Instructions: The data in Georeferenced Tagged Image File Format (.tif); the maps in Portable Document Format (.pdf), and Portable Network Graphics (.png) formats; and the web map services are available from the NASA Socioeconomic Data and Applications Center (SEDAC). Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: GeoTIFF File_Decompression_Technique: Unzip Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://sedac.ciesin.columbia.edu/data/set/popdynamics-global-est-net-migration-grids-1970-2000/data-download Access_Instructions: Data accessible via the data set landing page. Digital_Form: Digital_Transfer_Information: Format_Name: PDF Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://sedac.ciesin.columbia.edu/data/set/popdynamics-global-est-net-migration-grids-1970-2000/maps Access_Instructions: Maps accessible via the data set landing page. Digital_Form: Digital_Transfer_Information: Format_Name: PNG Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://sedac.ciesin.columbia.edu/data/set/popdynamics-global-est-net-migration-grids-1970-2000/maps Access_Instructions: Maps accessible via the data set landing page. Digital_Form: Digital_Transfer_Information: Format_Name: WMS Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://sedac.ciesin.columbia.edu/data/set/popdynamics-global-est-net-migration-grids-1970-2000/maps/services Access_Instructions: Web Map Services accessible via the data set landing page. Available_Time_Period: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20150918 Ending_Date: Present Metadata_Reference_Information: Metadata_Date: 20140929 Metadata_Review_Date: 20220414 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Center for International Earth Science Information Network (CIESIN) Metadata Administration Contact_Address: Address_Type: mailing and physical address Address: CIESIN, Columbia University, 61 Route 9W, P.O. Box 1000 City: Palisades State_or_Province: New York Postal_Code: 10964 Country: USA Contact_Voice_Telephone: +1 845-365-8988 Contact_Facsimile_Telephone: +1 845-365-8922 Contact_Electronic_Mail_Address: metadata@ciesin.columbia.edu Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time