slide building generalizated tool for road data of big scale topographic map

The 14th Conference on Science and Technology HCMC University of Technology Section of Geomatics Engineering BUILDING GENERALIZATED TOOL FOR ROAD DATA OF BIG SCALE TOPOGRAPHIC MAP Nguyen Thi Lan Thuong1, Vu Xuan Cuong2 (1) Faculty of Land Management and Real Estate, Nong Lam University of HCMC (2) Ho Chi Minh University for Natural Resouces and Environment Why we generalizate? Satellite image Map On satellite images, aerial photographs, no content selection as shown Also on the topographic map, content must be selected, generalized as shown www.trungtamtinhoc.edu.vn The same area with different map scale - decreasing the level of detail to ensure the readability of the map So we must generalize www.trungtamtinhoc.edu.vn What is generalization? Generalized map is selection and generalization of objects that are displayed on the map to suit the purpose of use, scale, subject map and characteristics of territories www.trungtamtinhoc.edu.vn Generalizated form  Simplification  Smoothing  Amalgamation  Aggregation  Merging  Collapse  Selection  Exaggeration  Enhancement  Displacement  Classification  Symbolisation www.trungtamtinhoc.edu.vn Some softwares have generalizated tools Mapinfo Microstation ArcGIS I selected ARCGIS software to study www.trungtamtinhoc.edu.vn Generalizated tools in ARCGIS software In ArcToolbox of ArcGIS, generalizated tools are organized into Generalization toolset www.trungtamtinhoc.edu.vn Knownledge map Generalization: complicated Problem Use ARCGIS software Not easy! Know how to use software Knownledge About quota generalization Knownledge About quota generalization www.trungtamtinhoc.edu.vn Knownledge map I built generalizated tool for big scale topographic map in ARCGIS software Road data Residential data River data Process of generalization www.trungtamtinhoc.edu.vn Solution for road data Generalizated form Objects Keep (maintain) Railroad in Station ; Notes; Past; Bridges; Street under water; Harbour; Dock; Lighthouse; Dangerous areas Eleminate reject Float bridge past railroad; Intersection of street and railroad; Beacon; Milestones; road sign, Pavement, Roadside; lane, park… Change symbols Types of railroad www.trungtamtinhoc.edu.vn Displacement tool www.trungtamtinhoc.edu.vn Tool for evaluating result of generalization www.trungtamtinhoc.edu.vn Pilots  Doing experiment for topography maps of 1/2000 scale to 1/10.000 scale  Study area: Hooc Mon District, Ho Chi Minh City www.trungtamtinhoc.edu.vn Before www.trungtamtinhoc.edu.vn Thử nghiệm After www.trungtamtinhoc.edu.vn Review results Big land lines before and after generalization www.trungtamtinhoc.edu.vn Review results Asphalt paved road before and after generalization www.trungtamtinhoc.edu.vn Review results Foot path before and after generalization www.trungtamtinhoc.edu.vn Review results Causeway before and after generalization www.trungtamtinhoc.edu.vn Review results Drain before and after generalization www.trungtamtinhoc.edu.vn Review results Buildings before and after generalization www.trungtamtinhoc.edu.vn Comment generalization  After making generalizations for prepared data, found that when expressed in proportion of 1: 10,000, map:     clear ventilation ensuring intuitive easy to see readability  After generalizating, there are some error: Error at the top of the roads www.trungtamtinhoc.edu.vn Find overlapping error between foot path and drain Suggestions  More studying about generalized operators to diversify map generalization tools for road data as well as residential data and river data  Building intelligent database or data geodatabase (the type of behavior) is much more complex case www.trungtamtinhoc.edu.vn References            A Magazines Droppová, V.,-The tools of automated generalization and building generalization in an ArcGIS environment Slovak Journal of Civil Engineering (2011) 1-7 Guo, Q S., Brandenberger, C., Hurni, L.,- A progressive line simplification algorithm GeoSpatial Information Science (2002) 41-45 McMaster, R B., Shea, K S.,- Generalization in digital cartography Washington, DC: Association of American Geographers (1992) Lee, D., - Automation of map generalization: The cutting-edge technology Esri White Paper Series (1996) B Books, Technical Reports, Doctoral thesis, Websites,… Lee, D., Hardy, P.,-Automating Generalization–Tools and Models In 22nd ICA Conference Proceedings, A Coruña, Spain (2005) Nhữ Thị Xuân ,- Bản đồ địa hình Hà Nội: Nhà xuất đại học Quốc gia Hà Nội (2003) Quyết định số 70/2000/QĐ-ĐC Tổng cục địa ngày 25 tháng 02 năm 2000 việc Ban hành Quy định kỹ thuật Số hóa đồ địa hình tỷ lệ 1:10000, 1:25000, 1:50000 1:100000 (2000) Quyết định số 1125/ĐĐBĐ ngày 19 tháng 11 năm 1994 Tổng Cục Địa Chính việc Ban hành Kí hiệu đồ địa hình tỷ lệ 1:500, 1:1000, 1:2000 1:5000 (1994) Quyết định số 1126/ĐĐBĐ ngày 19 tháng 11 năm 1994 Tổng Cục Địa Chính việc Ban hành Kí hiệu đồ địa hình tỷ lệ 1:10.000 1:25.000 (1994) www.trungtamtinhoc.edu.vn ... Knownledge map I built generalizated tool for big scale topographic map in ARCGIS software Road data Residential data River data Process of generalization www.trungtamtinhoc.edu.vn Solution for road data. .. generalization tool Building menu www.trungtamtinhoc.edu.vn Building tools:  Tool for data conversion  Tool for merging maps  Tool for selecting map coordinate system  Tool for importing quota of generalization... generalization  Tool for generalizated map Tools after generalization     Tool for finding overlapping error Displacement tool Tool for updating attribute field Tool for evaluating result of generalization