{"id":10006,"date":"2025-02-18T13:33:18","date_gmt":"2025-02-18T19:33:18","guid":{"rendered":"https:\/\/www.agron.iastate.edu\/glsi\/?page_id=10006"},"modified":"2025-10-01T13:02:06","modified_gmt":"2025-10-01T18:02:06","slug":"surficial-geology-of-south-dakota-gis","status":"publish","type":"post","link":"https:\/\/www.agron.iastate.edu\/glsi\/gis-data\/physiography-gis-data\/surficial-geology-of-south-dakota-gis\/","title":{"rendered":"Surficial Geology of South Dakota GIS Data"},"content":{"rendered":"\n<div class=\"wp-block-ugb-container ugb-container ugb-ee96871 ugb-container--v2 ugb-container--design-plain ugb-main-block\"><style>@media screen and (min-width:768px){.ugb-ee96871.ugb-container{margin-bottom:0px !important}}@media screen and (min-width:768px){.ugb-ee96871 > .ugb-inner-block > .ugb-block-content > *{padding-bottom:0px !important}}<\/style><div class=\"ugb-inner-block\"><div class=\"ugb-block-content\"><div class=\"ugb-container__wrapper ugb-ee96871-wrapper\"><div class=\"ugb-container__side\"><div class=\"ugb-container__content-wrapper ugb-ee96871-content-wrapper\"><div class=\"paragraph-widget paragraph-widget--text-html\">\n\t<div class=\"text-content\">\n\t\t<h4>This raster dataset presents a highly detailed map of surface geologic (parent) materials across South Dakota. The delineations are based on detailed soil maps at scales from 1:24,000 to 1:12,000, merged by USDA-NRCS into the gSSURGO spatial database. The data was interpreted by Iowa State University\u2019s Geospatial Laboratory for Soil Informatics (GLSI) at a 10-meter resolution, classifying parent materials to a depth of 2 meters from the land surface.<\/h4>\n\n\t<\/div>\n<\/div>\n<\/div><\/div><\/div><\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-ugb-container ugb-container ugb-8bdbc79 ugb-container--v2 ugb-container--design-plain ugb-main-block\"><style>@media screen and (min-width:768px){.ugb-8bdbc79.ugb-container{margin-bottom:0px !important}}@media screen and (min-width:768px){.ugb-8bdbc79 > .ugb-inner-block > .ugb-block-content > *{padding-top:0px !important;padding-bottom:0px !important}}<\/style><div class=\"ugb-inner-block\"><div class=\"ugb-block-content\"><div class=\"ugb-container__wrapper ugb-8bdbc79-wrapper\"><div class=\"ugb-container__side\"><div class=\"ugb-container__content-wrapper ugb-8bdbc79-content-wrapper\">\n<div class=\"wp-block-stackable-columns stk-block-columns stk-block stk-9cc33fa\" data-block-id=\"9cc33fa\"><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-9cc33fa-column\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-001bb93\" data-v=\"4\" data-block-id=\"001bb93\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-001bb93-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-001bb93-inner-blocks\"><div class=\"paragraph-widget paragraph-widget--text-html\">\n\t<div class=\"text-content\">\n\t\t<h2>Interpretation Method<\/h2>\n<p>Surficial material classifications were derived from NRCS Official Soil Series Descriptions (OSD), supplemented by GLSI with additional interpretation using soil morphology, topographic context, and spatial relationships with nearby, better-defined soil series. The map includes geologic materials such as glacial till, loess, residuum, alluvium, and outwash.<\/p>\n<h2>Applications and Visualization Tips<\/h2>\n<p>This dataset aids in understanding landscape evolution, soil formation, and surface hydrology across South Dakota. For enhanced visualization, overlay the dataset on high-resolution hillshades or digital elevation models (DEMs) to highlight the connections between topography and surficial geology.<\/p>\n<h2>Resolution and Coverage<\/h2>\n<p class=\"\" data-start=\"1389\" data-end=\"1488\">10-meter raster resolution covering the entire state of South Dakota.<\/p>\n\n\t<\/div>\n<\/div>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-ce9246d\" data-v=\"4\" data-block-id=\"ce9246d\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-ce9246d-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-ce9246d-inner-blocks\">\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"2819\" height=\"1962\" src=\"https:\/\/www.agron.iastate.edu\/glsi\/files\/2025\/02\/Surficial-Geology-SD-1.png\" alt=\"\" class=\"wp-image-10007\" style=\"width:450px\" srcset=\"https:\/\/www.agron.iastate.edu\/glsi\/files\/2025\/02\/Surficial-Geology-SD-1.png 2819w, https:\/\/www.agron.iastate.edu\/glsi\/files\/2025\/02\/Surficial-Geology-SD-1-300x209.png 300w, https:\/\/www.agron.iastate.edu\/glsi\/files\/2025\/02\/Surficial-Geology-SD-1-1024x713.png 1024w, https:\/\/www.agron.iastate.edu\/glsi\/files\/2025\/02\/Surficial-Geology-SD-1-768x535.png 768w, https:\/\/www.agron.iastate.edu\/glsi\/files\/2025\/02\/Surficial-Geology-SD-1-1536x1069.png 1536w, https:\/\/www.agron.iastate.edu\/glsi\/files\/2025\/02\/Surficial-Geology-SD-1-2048x1425.png 2048w\" sizes=\"auto, (max-width: 2819px) 100vw, 2819px\" \/><\/figure>\n<\/div><\/div><\/div>\n<\/div><\/div>\n<\/div><\/div><\/div><\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-ugb-container ugb-container ugb-d1207b7 ugb-container--v2 ugb-container--design-plain ugb-main-block\"><style>.ugb-d1207b7 .ugb-inner-block{text-align:center}@media screen and (min-width:768px){.ugb-d1207b7.ugb-container{margin-bottom:0px !important}}@media screen and (min-width:768px){.ugb-d1207b7 > .ugb-inner-block > .ugb-block-content > *{padding-top:0px !important}}<\/style><div class=\"ugb-inner-block\"><div class=\"ugb-block-content\"><div class=\"ugb-container__wrapper ugb-d1207b7-wrapper\"><div class=\"ugb-container__side\"><div class=\"ugb-container__content-wrapper ugb-d1207b7-content-wrapper\"><div class=\"paragraph-widget paragraph-widget--text-html\">\n\t<div class=\"text-content\">\n\t\t<h2 class=\"text-align-center\">GIS Map Folder Download<\/h2>\n<p class=\"text-align-center\">Click the button below to access the GIS data.<\/p>\n\n\t<\/div>\n<\/div>\n\n\n<a href=\"https:\/\/www.agron.iastate.edu\/glsi\/?ddownload=5356\" title=\"Download\" rel=\"nofollow\" class=\"ddownload-button button-yellow id-5356 ext-\">Download<\/a>\n<\/div><\/div><\/div><\/div><\/div><\/div>\n\n\n<div class=\"paragraph-widget paragraph-widget--text-html\">\n\t<div class=\"text-content\">\n\t\t<h2>GIS Map Details<\/h2>\n<p>This raster is a highly detailed map of geologic materials at the surface (delineations made from maps at 1:24,000 to 1:12,000 scale). The smaller extent maps were merged together by USDA-NRCS to produce the gSSURGO spatial database, covering the entire state at a 10m resolution. The gSSURGO map was then interpreted by Iowa State University\u2019s Geospatial Laboratory for Soil Informatics (GLSI) for parent material, which is equivalent to the geologic material to a depth of 2 meters from the surface. Surficial material attributes were extracted from the NRCS official soil series descriptions (OSD), but at times some additional interpretation was needed based on typical soil profile properties and spatial relationships with better-defined soil series. Because of the common relationship between surficial geology and topography, digital elevation models would be complementary to this data set. Draping this surfical geology data set over hillshades derived from fine resolution elevation data works especially well.<\/p>\n<h2>References<\/h2>\n<p>Miller, B.A. and C.L. Burras. 2015. Comparison of surficial geology maps based on soil survey and in depth geological survey.&nbsp;<a title=\"Soil Horizons\" href=\"https:\/\/web.archive.org\/web\/20240603122810\/https:\/\/www.soils.org\/publications\/sh\/abstracts\/56\/1\/sh14-05-0005\" target=\"_blank\" rel=\"noopener noreferrer\">Soil&nbsp;Horizons 56(1). doi:10.2136\/sh14-05-0005.<\/a><\/p>\n<p>Soil Survey Staff. 2014. Official Soil Series Descriptions (OSD). United States Department of Agriculture, Natural Resources Conservation Service.&nbsp;<a title=\"Official Soil Series Descriptions\" href=\"https:\/\/web.archive.org\/web\/20240603122810\/https:\/\/soilseries.sc.egov.usda.gov\/osdname.asp\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/soilseries.sc.egov.usda.gov\/osdname.asp<\/a><\/p>\n<p>Soil Survey Staff. 2014. Gridded Soil Survey Geographic (gSSURGO). United States Department of Agriculture, Natural Resources Conservation Service.&nbsp;<a title=\"NRCS geospatial data gateway\" href=\"https:\/\/web.archive.org\/web\/20240603122810\/http:\/\/datagateway.nrcs.usda.gov\/\" target=\"_blank\" rel=\"noopener noreferrer\">http:\/\/datagateway.nrcs.usda.gov<\/a><\/p>\n\n\t<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":3216,"featured_media":10007,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"ngg_post_thumbnail":0,"footnotes":""},"categories":[305],"tags":[],"class_list":["post-10006","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-physiography-gis-data"],"acf":[],"featured_image_urls_v2":{"full":["https:\/\/www.agron.iastate.edu\/glsi\/files\/2025\/02\/Surficial-Geology-SD-1.png",2819,1962,false],"thumbnail":["https:\/\/www.agron.iastate.edu\/glsi\/files\/2025\/02\/Surficial-Geology-SD-1-150x150.png",150,150,true],"medium":["https:\/\/www.agron.iastate.edu\/glsi\/files\/2025\/02\/Surficial-Geology-SD-1-300x209.png",300,209,true],"medium_large":["https:\/\/www.agron.iastate.edu\/glsi\/files\/2025\/02\/Surficial-Geology-SD-1-768x535.png",768,535,true],"large":["https:\/\/www.agron.iastate.edu\/glsi\/files\/2025\/02\/Surficial-Geology-SD-1-1024x713.png",1024,713,true],"1536x1536":["https:\/\/www.agron.iastate.edu\/glsi\/files\/2025\/02\/Surficial-Geology-SD-1-1536x1069.png",1536,1069,true],"2048x2048":["https:\/\/www.agron.iastate.edu\/glsi\/files\/2025\/02\/Surficial-Geology-SD-1-2048x1425.png",2048,1425,true]},"post_excerpt_stackable_v2":"<p>This raster dataset presents a highly detailed map of surface geologic (parent) materials across South Dakota. The delineations are based on detailed soil maps at scales from 1:24,000 to 1:12,000, merged by USDA-NRCS into the gSSURGO spatial database. The data was interpreted by Iowa State University\u2019s Geospatial Laboratory for Soil Informatics (GLSI) at a 10-meter resolution, classifying parent materials to a depth of 2 meters from the land surface. Interpretation Method Surficial material classifications were derived from NRCS Official Soil Series Descriptions (OSD), supplemented by GLSI with additional interpretation using soil morphology, topographic context, and spatial relationships with nearby, better-defined&hellip;<\/p>\n","category_list_v2":"<a href=\"https:\/\/www.agron.iastate.edu\/glsi\/category\/gis-data\/physiography-gis-data\/\" rel=\"category tag\">Physiography GIS Data<\/a>","author_info_v2":{"name":"Bradley Miller","url":"https:\/\/www.agron.iastate.edu\/glsi\/author\/millerba\/"},"comments_num_v2":"0 comments","yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Surficial Geology of South Dakota GIS Data - Geospatial Laboratory for Soil Informatics<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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