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The report details study area definition, shoreline and bathymetry/topography data sources, datum harmonization through vertical and horizontal transformations, and DEM creation including NAVD 88 and Mean High Water products. Quality assessment covers horizontal and vertical accuracy, slope and 3-D visualization, and quantitative comparisons with multiple datasets and National Geodetic Survey monuments.",{"@graph":63,"@context":111},[64,80,102],{"@type":65,"itemListElement":66},"BreadcrumbList",[67,71,74,77],{"item":68,"name":69,"@type":70,"position":9},"https://docshare.wps.com","Home","ListItem",{"item":72,"name":10,"@type":70,"position":73},"https://docshare.wps.com/template/",2,{"item":75,"name":51,"@type":70,"position":76},"https://docshare.wps.com/template/general/",3,{"item":78,"name":59,"@type":70,"position":79},"https://docshare.wps.com/template/digital-elevation-models-of-san-diego-california-procedures-data-sources-and-analysis-march-7-2012/563931/",4,{"url":78,"name":59,"@type":81,"image":82,"author":87,"headline":59,"publisher":90,"fileFormat":93,"inLanguage":57,"description":61,"dateModified":94,"datePublished":95,"encodingFormat":93,"isAccessibleForFree":96,"interactionStatistic":97},"DigitalDocument",{"url":83,"@type":84,"width":85,"height":86},"https://docshare.wps.com/thumbnails/digital-elevation-models-of-san-diego-california-procedures-data-sources-and-analysis-march-7-2012/563931.png","ImageObject",442,249,{"name":88,"@type":89},"Lucas Martin","Person",{"url":68,"name":91,"@type":92},"DocShare","Organization","application/pdf","2026-10-26","2026-10-12",true,{"@type":98,"interactionType":99,"userInteractionCount":101},"InteractionCounter",{"@type":100},"ViewAction",7,{"@type":103,"mainEntity":104},"FAQPage",[105],{"name":106,"@type":107,"acceptedAnswer":108},"How is DEM quality assessed and validated?","Question",{"text":109,"@type":110},"Quality assessment includes horizontal and vertical accuracy evaluations, slope and 3-D visualization, and comparisons with source data and National Geodetic Survey monuments.","Answer","https://schema.org",{"og:url":78,"og:type":113,"og:title":59,"og:site_name":91,"og:description":61},"article",{"robots":115,"canonical":78},"index,follow",{"doc_id":117,"site_id":56},563931,1792110446,{"code":4,"msg":5,"data":120},{"doc_id":117,"user_id":121,"nickname":88,"user_avatar":122,"doc_module":9,"category_id":50,"category_name":51,"doc_title":59,"doc_description":61,"doc_content":123,"file_id":124,"file_url":125,"file_type":126,"file_size":127,"view_count":101,"is_deleted":4,"is_public":9,"is_downloadable":9,"audit_status":9,"page_count":128,"language":129,"language_code":57,"site_id":56,"html_lang":57,"table_of_contents":130,"faqs":131,"seo_title":132,"seo_description":61,"update_tm":133,"read_time":134},8796095360427,"https://ap-avatar.wpscdn.com/davatar_994ba38a5ba835b3df7d355c54d3ed8d","Digital Elevation Models of San Diego, California: Procedures, Data Sources and Analysis  \nPrepared for the Pacific Marine Environmental Laboratory (PMEL) NOAA Center for Tsunami Research by the NOAA National Geophysical Data Center (NGDC)  \nMarch 7, 2012  \nCarignan, K. S.1, L.A. Taylor2, B.W. Eakins1, D.Z. Friday1, P.R. Grothe1, and M. Love1 1Cooperative Institute for Research in Environmental Sciences, University of Colorado at Boulder 2NOAA, National Geophysical Data Center, Boulder, Colorado  \nCorresponding project contact: Lisa A. Taylor  \nNOAA, National Geophysical Data Center Marine Geology and Geophysics Division  \n325 Broadway, E/GC 3 Boulder, Colorado 80305 Phone: 303-497-6767  \nFax: 303-497-6513  \n[E-mail: Lisa.A.Taylor@noaa.gov](E-mail: Lisa.A.Taylor@noaa.gov)  \n[http://www.ngdc.gov/mgg/inundation/](http://www.ngdc.gov/mgg/inundation/)  \nContents  \n1. Introduction .................................................................................................................................................. 1  \n2. Study Area.................................................................................................................................................... 2  \n3. Methodology ................................................................................................................................................ 3  \n3.1 Data Sources and Processing ..................................................................................................... 4  \n3.1.1 Coastline ............................................................................................................... 5  \n3.1.2 Bathymetry ........................................................................................................... 6  \n3.1.3 Topography......................................................................................................... 17  \n3.2 Establishing Common Datums ................................................................................................ 19  \n3.2.1 Vertical datum transformations .......................................................................... 19  \n3.2.2 Horizontal datum transformations...................................................................... 19  \n3.3 Digital Elevation Model Development .................................................................................... 20  \n3.3.1 Verifying consistency between datasets ............................................................. 20  \n3.3.2 Smoothing of bathymetric data .......................................................................... 20  \n3.3.3 Building the 1/3 arc-second NAVD 88 DEM..................................................... 21  \n3.3.4 Developing the Mean High Water DEM ............................................................ 21  \n3.4 Quality Assessment of the DEM.............................................................................................. 23  \n3.4.1 Horizontal accuracy............................................................................................ 23  \n3.4.2 Vertical accuracy ................................................................................................ 23  \n3.4.3 Slope map, 3-D perspective, and data contribution plot .................................... 24  \n3.4.4 NAVD 88 DEM comparison with source data files ........................................... 27  \n3.4.5 Comparison with National Geodetic Survey geodetic monuments.................... 28  \n4. Summary and Conclusions ........................................................................................................................ 30  \n5. Acknowledgments...................................................................................................................................... 30  \n6. References .................................................................................................................................................. 31  \n7. Data Processin","cbCaioQh2X6KGuCP","https://ap.wps.com/l/cbCaioQh2X6KGuCP","pdf",1454816,36,"English","# Introduction\n# Study Area\n# Methodology\n## Data Sources and Processing\n## Establishing Common Datums\n## Digital Elevation Model Development\n## Quality Assessment of the DEM\n# Summary and Conclusions\n# Acknowledgments\n# References\n# Data Processing Software","[{\"question\":\"How is DEM quality assessed and validated?\",\"answer\":\"Quality assessment includes horizontal and vertical accuracy evaluations, slope and 3-D visualization, and comparisons with source data and National Geodetic Survey monuments.\"}]","Digital Elevation Models of San Diego, California - Procedures, Data Sources and Analysis - March 7, 2012 | PDF",1791839403,13]