{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/69897"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/69897","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Accuracy of Earthwork Calculations From Digital Elevation Data","abstract":"Recent developments in photogrammetric methods, in general, and orthophoto mapping in particular, have resulted in the increasing availability of digital elevation data. The accuracy of digital elevation data generated from the orthophoto scanning process is usually below the level normally needed for earthwork calculations. However, the density and quantity of the elevation data from this source usually exceeds by many folds the coverage used in the conventional method of field or photogrammetric method of cross-section leveling. An investigation aimed at studying the effects of accuracy, density and distribution of gridded elevation data on the accuracy of earthwork calculations had been conducted.","abstract_html":"Recent developments in photogrammetric methods, in general, and orthophoto mapping in particular, have resulted in the increasing availability of digital elevation data. The accuracy of digital elevation data generated from the orthophoto scanning process is usually below the level normally needed for earthwork calculations. However, the density and quantity of the elevation data from this source usually exceeds by many folds the coverage used in the conventional method of field or photogrammetric method of cross-section leveling. An investigation aimed at studying the effects of accuracy, density and distribution of gridded elevation data on the accuracy of earthwork calculations had been conducted.","abstract_has_math":false,"creators":["Siyam, Youssuf Mustafa"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Civil Engineering","degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2014,"date_issued":"2014-12-15T20:35:42Z","date_published":"2014-12-15T20:35:42Z","updated_at":"2026-07-22T22:26:01Z","subjects":["Engineering, Civil"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(UMI)AAI8203591"],"render_values":[{"text":"(UMI)AAI8203591","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/69897","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Siyam, Youssuf Mustafa"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2014-12-15T20:35:42Z","10000-01-01","1981"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Civil Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Engineering, Civil"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/69897","(UMI)AAI8203591"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Recent developments in photogrammetric methods, in general, and orthophoto mapping in particular, have resulted in the increasing availability of digital elevation data. The accuracy of digital elevation data generated from the orthophoto scanning process is usually below the level normally needed for earthwork calculations. However, the density and quantity of the elevation data from this source usually exceeds by many folds the coverage used in the conventional method of field or photogrammetric method of cross-section leveling. An investigation aimed at studying the effects of accuracy, density and distribution of gridded elevation data on the accuracy of earthwork calculations had been conducted.","Results from this investigation had clearly demonstrated that in earthwork calculations, the density and quantity of the data base can compensate for the decrease in data accuracy. More specifically, the elevation data generated from the orthophoto scanning process, can potentially be used to provide accurate volume measurements. Quantitative approach and general prediction formulas were developed to relate the reliability of volume determination with elevation accuracy, data spacing along the cross-section profile, distance between cross-sections, and the type of topography.","Made available in DSpace on 2014-12-15T20:35:42Z (GMT). No. of bitstreams: 1 8203591.pdf: 6378434 bytes, checksum: 220fe54e1f8454f9f3c0ef0883c4e2e2 (MD5) Previous issue date: 1981","Embargo set by: Seth Robbins for item 70063 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","285 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1981."]},{"key":"dc:title","label":"Title","values":["Accuracy of Earthwork Calculations From Digital Elevation Data"]}]}],"canonical_facts":{"dc:creator":["Siyam, Youssuf Mustafa"],"dc:date":["2014-12-15T20:35:42Z","10000-01-01","1981"],"dc:description":["Recent developments in photogrammetric methods, in general, and orthophoto mapping in particular, have resulted in the increasing availability of digital elevation data. The accuracy of digital elevation data generated from the orthophoto scanning process is usually below the level normally needed for earthwork calculations. However, the density and quantity of the elevation data from this source usually exceeds by many folds the coverage used in the conventional method of field or photogrammetric method of cross-section leveling. An investigation aimed at studying the effects of accuracy, density and distribution of gridded elevation data on the accuracy of earthwork calculations had been conducted.","Results from this investigation had clearly demonstrated that in earthwork calculations, the density and quantity of the data base can compensate for the decrease in data accuracy. More specifically, the elevation data generated from the orthophoto scanning process, can potentially be used to provide accurate volume measurements. Quantitative approach and general prediction formulas were developed to relate the reliability of volume determination with elevation accuracy, data spacing along the cross-section profile, distance between cross-sections, and the type of topography.","Made available in DSpace on 2014-12-15T20:35:42Z (GMT). No. of bitstreams: 1 8203591.pdf: 6378434 bytes, checksum: 220fe54e1f8454f9f3c0ef0883c4e2e2 (MD5) Previous issue date: 1981","Embargo set by: Seth Robbins for item 70063 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","285 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1981."],"dc:identifier":["http://hdl.handle.net/2142/69897","(UMI)AAI8203591"],"dc:subject":["Engineering, Civil"],"dc:title":["Accuracy of Earthwork Calculations From Digital Elevation Data"],"dc:type":["text"],"thesis:degree_discipline":["Civil Engineering"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:26:01Z"}