Session #9: Requesting Project Mapping and Surveys - When, How and Why?
Mapping and Surveys Work Group
September 15, 26 and 27, 2017
Presentation Topics
Requesting Project Mapping and Surveys
• Introduction / Background / Why This Is Important• Roles / Responsibilities• Process / When and How To Request Products• Project Types / Design Types / Products• Question and Answer
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Introduction / Background /Why This Is Important
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Work Group
Requesting Project Mapping and Surveys
• Keith Johnston Photogrammetry• Dale Burton Location & Surveys• Keith Honeycutt Location & Surveys• Matt Clarke Division 4• Michael Poe Division 12• Tatia White Project Delivery Team B• Glenn Mumford Roadway Design• Jeff Roerden Governance
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Background
Requesting Project Mapping and Surveys
• Project mapping and surveys require programmed funding, correct limits, and sufficient lead time
• There are a limited number of qualified PEFs available to augment NCDOT Photogrammetry and Location & Surveys staff to perform mapping and surveys work
• Inadequate coordination, incorrect project limits, or changes to limits can lead to unnecessary work, longer durations to complete the work, over-extension of available resources, or late mapping and survey delivery
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The Task
Requesting Project Mapping and Surveys
• Develop a long-term, well-planned, programmatic approach to establish priorities and correctly identify and request aerial photography, mapping, and surveying that…– Meets all business unit needs
– Reduces changes and rework
– Removes Photogrammetry and L&S from the critical path for project delivery
• The aim is to ensure all projects have the correct priority with clear identification of the needed mapping products and limits and a reasonable date for delivering those mapping products
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Findings
Requesting Project Mapping and Surveys
• There is an intent to accelerate PE on all projects and bank “shelved and ready” projects
• 14 Divisions, 4 Central Project Delivery Teams, and Structures Management working independently has led to many #1 priorities and does not provide an opportunity for collaboration to allocate limited resources
• Planning and communication needs to be improved• The current process emphasizes requesting final
surveys when lesser products may be suitable
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Recommendations
Requesting Project Mapping and Surveys
• Develop clear descriptions of products and what they can be used for based on project type / document type
• Develop a clear process for requesting mapping products• Conduct joint Central / Division mapping meetings by
region• Clearly define products and limits• Manage requests and products in areas where multiple
projects are planned• Use existing QL2 LiDAR and Ortho data up to selected
alternative• Ensure all requests from consultants are properly vetted
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Overall Objective
Requesting Project Mapping and Surveys
Encourage ALL project managers to…
• Acquire PE funding• Work with Location & Surveys to identify project mapping
and survey needs and appropriate mapping and survey limits
• Complete the mapping request spreadsheet and submit it to Photogrammetry ([email protected]) and Location & Surveys ([email protected]) by October 16
• Participate in upcoming regional mapping meetings
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Mapping Request Documentation
Requesting Project Mapping and Surveys
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Help us help you: Work with your Location & Surveys partners
DivisionProject
ManagementRequestor
Name Mapping ProductMapping
ScaleDate
Needed ByPROJ. DEF.
(WBS)
PE Funding Approved
(Y/N)ROW Date Let Date
Reservoir Project /
Production Schedule (Y/N)
Length (miles) DescriptionSpecial Notes and link to Project Limits
(include any production ROW and/or production Let dates)
Roles / Responsibilities
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Photogrammetry
Requesting Project Mapping and Surveys
• Perform flight and photo control planning for mapping and surveys that support NCDOT projects
• Acquire controlled aerial imagery• Use Limited Services Agreements with multiple firms to
generate mapping products• Review and deliver mapping products
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Location and Surveys
Requesting Project Mapping and Surveys
• Limited in-house resources to generate survey products• Utilize in-house staff to establish project control since
this is the basis for all subsequent mapping and surveys• Use Limited Services Agreements with multiple firms to
generate a variety of surveys used for transportation projects
• Assist Division Project Development Engineers by serving as the primary contact in requesting, coordinating, and scheduling the appropriate Surveys and Mapping Products with Photogrammetry
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Division and Central Project Managers
Requesting Project Mapping and Surveys
• Acquire PE funding• Establish project delivery schedule• Identify needed mapping and surveys products and limits
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Collaborative Effort
Requesting Project Mapping and Surveys
• The majority of mapping and surveys products used for planning and design are produced with work performed concurrently by Photogrammetry and Location & Surveys
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Photogrammetry Staff
Requesting Project Mapping and Surveys
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Location & Surveys Staff
Requesting Project Mapping and Surveys
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Central Project Management Teams
Requesting Project Mapping and Surveys
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Process / When and How To Request Products
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2017 Mapping and Surveys Request Process
Requesting Project Mapping and Surveys
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Send Spreadsheet to
Implementation Timeline
Requesting Project Mapping and Surveys
1. 09-11-17: Send Mapping Request / Documentation to Divisions and Central Project Delivery Teams
2. 09-15-17: Regional Mapping Meetings are scheduled in advance to be accomplished 10-30-17 to 11-14-17
3. 10-16-17: Completed Mapping Request spreadsheet and DGN limits are submitted to Photogrammetry / Location & Surveys – Send to Rob Allen at [email protected] and Dale Burton at [email protected]
4. 10-30-17 to 11-14-17: Regional Mapping Meetings conducted with Division & Central Project Managers, Photogrammetry, and Location & Surveys
5. 11-14-17: Mapping products and limits with tentative delivery schedules are identified at Regional Meetings
6. 12-01-17: Photogrammetry / Location & Surveys submit revised delivery schedules to Division Engineers and appropriate Division and Central staff for Prioritization
7. 12-22-17: Division Engineers and appropriate Division and Central staff establish final product delivery dates
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Regional Coordination
Requesting Project Mapping and Surveys
• Project Management Team A and Divisions 1, 2, 3, 4, 6
• Project Management Team B and Divisions 5, 8
• Project Management Team C and Divisions 7, 9, 10
• Project Management Team D and Divisions 11, 12, 13, 14
• Structures will also be involved regionally
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2017 Regional Meeting Preparation
Requesting Project Mapping and Surveys
• List of projects that the Division or Central Team will require mapping or surveys by June 2019 with…– STIP #
– Product
– Limits
– Schedule
• Attendees:– Division project development engineers
– Central project delivery team lead
– Photogrammetry assistant unit head
– Photogrammetry group manager
– L&S regional project development engineer
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Mapping Request Spreadsheet
Requesting Project Mapping and Surveys
• TIP #• Division• Project Management
– Division
– Central Team A, B, C or D
– Rail
– Structures
• Requestor• Date Needed• WBS• PE Funding Approved (Y/N)
• ROW Date and Let Date
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• Product– Final Surveys
– Preliminary Plan Sheets
– Shell Plan Sheets
– Topo
– Ortho
– Mosaic
– Controlled Aerial Photography
– Other (specify Special Notes)
• Mapping Scale (1” = 400’ to 20’)
• Reservoir Project (Y/N)
• Project Length• Description• Special Notes
Annual Mapping and Surveys Request Process - Future
Requesting Project Mapping and Surveys
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Products
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Project Type
Requesting Project Mapping and Surveys
• New Location• Large Widening• Average Widening• Small Widening• Bridge and Small Safety Improvements
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Design Type
Requesting Project Mapping and Surveys
• Functional Design– General design that includes horizontal and vertical alignments,
EP’s, slope stakes and preliminary R/W limits for all study alternatives done on Orthophotography
• Preliminary Design– Specific design that includes horizontal and vertical alignments,
EP’s, slope stakes, turn lanes, superelevation and preliminary R/W limits done on preliminary mapping (topographic mapping, shell plan sheet mapping, or preliminary plan sheet mapping)
• Final Design– Very detailed design done on the most accurate form of
mapping, final surveys
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Existing Statewide Geospatial Data
Requesting Project Mapping and Surveys
• Available to ALL NCDOT users• No PE funding required• Good resource for functional designs and / or display
purposes• Contact your Division L&S Engineer or Photogrammetry
for information on how to access this data
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Statewide Digital Orthophotography Status Map (September 2017)
Requesting Project Mapping and Surveys
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NOTE: 2017 Orthophotography that covers the 2013 counties will be available in December 2017
Statewide LiDAR Status Map (August 2017)
Requesting Project Mapping and Surveys
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Requesting Project Mapping and Surveys
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GIS Property Data (Photogrammetry can provide in Microstation DGN file with parcel numbers
and a corresponding excel file with parcel information)
Products / Timeframe
Requesting Project Mapping and Surveys
• Controlled Aerial Photography (CAP)– Flown by Photogrammetry Unit in anticipation of future project
mapping needs to take advantage of the ‘leaf-off’ flying season from late January to mid April
– Data can be captured and held or it can be processed
– Timeframe: 1-4 weeks from receipt of project limits (Microstationclosed polygon)
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Leaf On - August 5th
Requesting Project Mapping and Surveys
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Leaf Off - March 7th
Requesting Project Mapping and Surveys
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Products / Timeframe
Requesting Project Mapping and Surveys
• Digital Mosaic (M)– Primary use for functional design and / or display purposes
– Timeframe: 1-3 months after receipt of request
• Orthophotography (OP)– Primary use for functional and preliminary design work
– Imagery from this product can be supplemented and transformed into Topographic Mapping
– Timeframe: 2-4 months after aerial photography completed and receipt of photo control
• Topographic Mapping (T)– Primary use for preliminary design work on new location and
large scale widening projects with multiple alternatives
– Timeframe: 2-4 months after aerial photography completed and receipt of photo control
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Requesting Project Mapping and Surveys
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Requesting Project Mapping and Surveys
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Topographic Mapping (Photogrammetric data only and no L&S data)
Requesting Project Mapping and Surveys
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Topographic Mapping (Photogrammetric data only with preliminary field classification and GIS
property data from NCOneMap)
Products / Timeframe
Requesting Project Mapping and Surveys
• Shell Plan Sheet Mapping (SPS)– Primary use for preliminary design work on widening projects
and bridge replacement projects
– This mapping is frequently converted into Final Surveys
– Timeframe: 2-4 months after aerial photography completed and receipt of photo control
• Preliminary Plan Sheet Mapping (PPS)– Primary use for preliminary design work on widening projects
and small new location projects
– This mapping is frequently converted into Final Surveys
– Timeframe: 2-4 months after aerial photography completed and receipt of photo control
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Mapping Scale
Requesting Project Mapping and Surveys
• 1” = 400’, 200’– Generally used for display purposes or functional design work for
large study areas
– Available from existing statewide geospatial data or can also be flown at high altitude for more current image (0.5 foot pixel mosaic)
• 1” = 200’, 100’– Generally used for preliminary design work for large projects
– Topographic mapping or 0.5 foot pixel orthophoto
• 1” = 50’, 30’, 20’– Generally used for final design work or preliminary design for small
projects
– 1” = 50’ is considered “NCDOT standard”
– 1” = 30’, 20’ useful for densely developed urban settings
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Products / Timeframe
Requesting Project Mapping and Surveys
• Final Surveys (FS)– Used for final design
– Usually produced jointly by Photogrammetry and Location & Surveys for larger projects where Shell or Preliminary Plan Sheet Mapping is converted to Final Surveys
– Can be completed solely by Location & Surveys for smaller projects (e.g. intersection improvement projects or bridge replacement projects)
– Timeframe: Photogrammetry needs 2-4 months after aerial photography completed and receipt of photo control. Depending on project complexity and length, L & S needs an additional 1-5 months after receipt of SPS or PPS data from Photogrammetry to complete Final Surveys.
– If numerous smaller projects are identified during the annual cycle prior to leaf-off flight season, it is usually most efficient to involve Photogrammetry and treat them as part of a statewide program 42
Components Included in Final Surveys
Requesting Project Mapping and Surveys
• Photogrammetric data– SPS and / or PPS
• Location & Surveys data– Establish Project Control (GPS, Baseline, Vertical Control)
– Contact Property Owners
– Property Owner Research / Compilation of Property Data (CADD, Deeds, Plats, Database, etc.)
– Drainage Features (Natural and Man-made)
– Utility Data (SUE, Gravity, Above Ground)
– Pavement DTMs (Mobile LiDAR)
– Additional Topographic Features & Obscured Areas
– Merging of All Data Sources / Quality Control
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Requesting Project Mapping and Surveys
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Requesting Project Mapping and Surveys
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Photogrammetric DTM Data (no ground surveyed elevation data)
Requesting Project Mapping and Surveys
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Final Photogrammetric DTM Data (includes ground surveyed pavement elevation data, obscured
area elevation data where QL2 LiDAR is not correct, and possibly hydro data)
Requesting Project Mapping and Surveys
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Photogrammetric Preliminary Plan Sheet Mapping (includes field classification of roadway, parking
areas, structures, & poles)
Requesting Project Mapping and Surveys
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Final Base Plan Sheets (includes ground surveyed utility data, property data, and possibly Hydro data)
Consideration - Preliminary Mapping Limits
Requesting Project Mapping and Surveys
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Proposed Alternates
Requesting Project Mapping and Surveys
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Consideration - Final Survey Limits
Requesting Project Mapping and Surveys
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Question and Answer
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Thank You for Participating in This Webinar
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