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Mapping global exposure from space: A review of existing products and comparison of two new layers of global urban extent

Klotz, Martin and Kemper, Thomas and Esch, Thomas and Pittore, Massimiliano and Marc, Wieland and Geiß, Christian and Taubenböck, Hannes (2014) Mapping global exposure from space: A review of existing products and comparison of two new layers of global urban extent. In: 2nd European Conference on Earthquake Engineering & Seismology, pp. 1-13. 2nd European Conference on Earthquake Engineering and Seismology (2ECEES), 24.-29. Aug. 2014, Istanbul, Turkey.

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Abstract

In order to assess and quantify earthquake risk over large spatial extents on a global or regional scale spatial data localizing human assets is on strong demand. However, due to the large-scale extent of human activities on our planet, the scientific community has been lacking tools and methodologies to capture the entity of elements at risk, especially with enhanced thematic and geometric detail on global scale. First generation of global land cover datasets and maps of urban extent produced since the millenium relied on coarse resolution satellite sensors such as MODIS or DMSP-OLS. Despite the availability of finer scale imagery no other product of global coverage has been made available until today. However, global human exposure mapping from remote sensing is now entering a new era and new products currently in the making such as the Global Urban Footprint and the Global Human Settlement Layer will deliver spatial information on human settlements at unprecedented spatial resolutions. Once available on a global scale, these layers will improve significantly the knowledge base for the localization of human assets with regard to georisks. This work reviews past mapping products of coarse geometric resolution and further presents first validation efforts of the two new layers based on standard accuracy measures with regard to a geometrically and thematically highly resolved building reference. This first assessment reveals that the high resolution settlement layers produce comparable outputs that are capable of mapping even smaller settlements in low-density rural areas although significant over-classification due to the specific characteristics of each classifier is obvious. To gain a deeper understanding of these layers further validations efforts using pattern-based regression analysis and measures of inter-map agreement are currently underway.

Item URL in elib:https://elib.dlr.de/91514/
Document Type:Conference or Workshop Item (Poster)
Title:Mapping global exposure from space: A review of existing products and comparison of two new layers of global urban extent
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Klotz, Martinmartin.klotz (at) dlr.deUNSPECIFIED
Kemper, Thomasthomas.kemper (at) jrc.ec.europa.euUNSPECIFIED
Esch, Thomasthomas.esch (at) dlr.deUNSPECIFIED
Pittore, Massimilianomassimiliano.pittore (at) gfz-potsdam.deUNSPECIFIED
Marc, Wielandmarc.wieland (at) gfz-potsdam.deUNSPECIFIED
Geiß, Christianchristian.geiss (at) dlr.deUNSPECIFIED
Taubenböck, Hanneshannes.taubenboeck (at) dlr.deUNSPECIFIED
Date:24 August 2014
Journal or Publication Title:2nd European Conference on Earthquake Engineering & Seismology
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1-13
Status:Published
Keywords:Exposure, global urban mapping, global human settlement layer, global urban footprint
Event Title:2nd European Conference on Earthquake Engineering and Seismology (2ECEES)
Event Location:Istanbul, Turkey
Event Type:international Conference
Event Dates:24.-29. Aug. 2014
Organizer:The European Association for Earthquake Engineering (EAEE) & European Seismological Commission (ESC)
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Zivile Kriseninformation und Georisiken (old)
Location: Oberpfaffenhofen
Institutes and Institutions:German Remote Sensing Data Center > Geo Risks and Civil Security
Deposited By: Klotz, Martin
Deposited On:04 Dec 2014 14:54
Last Modified:31 Jul 2019 19:48

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