requesting mapping and surveys webinar final documents/project...existing statewide geospatial data...

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

Introduction / Background /Why This Is Important

Work Group

• 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

Background

• 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

The Task

• 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

Findings

• 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

Recommendations

• 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

Overall Objective

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 (roballen@ncdot.gov) and Location & Surveys (jburton@ncdot.gov) by October 16

• Participate in upcoming regional mapping meetings

Mapping Request Documentation

Help us help you: Work with your Location & Surveys partners

DivisionProject

ManagementRequestor

Name Mapping ProductMapping

ScaleDate

Needed ByPROJ. DEF.

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

Photogrammetry

• 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

Location 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

Division and Central Project Managers

• Acquire PE funding• Establish project delivery schedule• Identify needed mapping and surveys products and limits

Collaborative Effort

• The majority of mapping and surveys products used for planning and design are produced with work performed concurrently by Photogrammetry and Location & Surveys

Photogrammetry Staff

Location & Surveys Staff

Central Project Management Teams

Process / When and How To Request Products

2017 Mapping and Surveys Request Process

Send Spreadsheet to

roballen@ncdot.gov

and jburton@ncdot.gov

Implementation Timeline

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 roballen@ncdot.gov and Dale Burton at jburton@ncdot.gov

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

Regional Coordination

• 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

2017 Regional Meeting Preparation

• 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

Mapping Request Spreadsheet

• 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

• 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

Products

Project Type

• New Location• Large Widening• Average Widening• Small Widening• Bridge and Small Safety Improvements

Design Type

• 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

Existing Statewide Geospatial Data

• 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

Statewide Digital Orthophotography Status Map (September 2017)

NOTE: 2017 Orthophotography that covers the 2013 counties will be available in December 2017

Statewide LiDAR Status Map (August 2017)

GIS Property Data (Photogrammetry can provide in Microstation DGN file with parcel numbers

and a corresponding excel file with parcel information)

Products / Timeframe

• 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)

Leaf On - August 5th

Leaf Off - March 7th

• 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

Topographic Mapping (Photogrammetric data only and no L&S data)

Topographic Mapping (Photogrammetric data only with preliminary field classification and GIS

property data from NCOneMap)

• 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

• 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

Mapping Scale

• 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

• 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

• 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

Photogrammetric DTM Data (no ground surveyed elevation data)

Final Photogrammetric DTM Data (includes ground surveyed pavement elevation data, obscured

area elevation data where QL2 LiDAR is not correct, and possibly hydro data)

Photogrammetric Preliminary Plan Sheet Mapping (includes field classification of roadway, parking

areas, structures, & poles)

Final Base Plan Sheets (includes ground surveyed utility data, property data, and possibly Hydro data)

Consideration - Preliminary Mapping Limits

Proposed Alternates

Consideration - Final Survey Limits

Question and Answer

Thank You for Participating in This Webinar

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