AC1 Lecture 5 Sept 30, 2026
Measured Survey Preparation & Fieldwork
1. Preparing for the Measured Survey
Introduction to the upcoming measured survey at a primary school in Portland
Purpose of the survey and its role in the BIM modelling assignment
Overview of the site visit, including travel arrangements and the four-hour survey period
Attendance, punctuality and professional conduct expectations
2. Assignment Structure & Assessment
The measured survey forms a significant component of the course assessment
Overview of the assessment criteria:
Technical accuracy
Collaboration
Workflow
Research
Field notes
Survey process
Professionalism
Understanding the distinction between individual and group responsibilities
Field notes and survey documentation forming part of the preliminary submission
3. Site Visit Logistics
Meeting at UTech for the bus departure
Confirming transportation and travel arrangements
Expected arrival and survey duration
Working in groups of approximately 6–8 students
Coordinating group roles before arriving on site
Being prepared to work around an active primary-school environment
4. Equipment & Preparation
Students should arrive prepared with appropriate fieldwork equipment, including:
Tape measures
Pens and pencils
Paper
Clipboards
Smartphones/cameras
Appropriate clothing and footwear
Any other equipment required by their assigned group
Students should also ensure that their Autodesk subscription and Revit installation are operational before the survey.
5. Planning the Survey
A successful measured survey begins with a clear plan.
Before arriving on site, students should determine:
Who is responsible for each area
Who is measuring
Who is recording
Who is taking photographs
How information will be shared between groups
How measurements will be labelled
How overlapping measurements will be coordinated
The objective is to ensure that the entire building can eventually be reconstructed accurately as a BIM model.
6. Measuring Buildings Accurately
Introduction to systematic building measurement
Using a three-person measurement team where possible:
One person at each end of the tape
One person documenting
Taking both overall and running dimensions
Recording ceiling heights
Measuring diagonals
Establishing relationships between rooms and spaces
Using triangulation to verify measurements
Avoiding assumptions about construction materials without evidence
7. Field Notes & Documentation
Good field notes are essential to producing an accurate digital model.
Students should:
Develop a consistent system of symbols and abbreviations
Use clear keys and labels
Apply consistent colour coding
Record measurements systematically
Sketch important building elements
Document assumptions clearly
Record information about:
Columns
Walls
Brickwork
Damp-proof courses
Services
Stairs and steps
Roof conditions
Other significant construction details
8. Photographic Documentation
Use photographs to supplement measurements and sketches
Take photographs sequentially and systematically
Capture relationships between spaces and building elements
Use photographs to verify field notes during modelling
Ensure photographs provide enough contextual information to identify where they were taken
9. Overlapping & Checking Measurements
Why measurements should overlap between groups
Using independent measurements to check accuracy
Applying triangulation where appropriate
Identifying discrepancies while still on site
Avoiding reliance on a single measurement
Ensuring that the collected information is sufficient to reconstruct the building accurately
10. From Fieldwork to BIM
The survey is the first stage of a larger digital workflow:
Measured Survey → Field Notes → Verified Data → BIM Model → Drawings & Documentation
Revit will be the primary modelling environment
Archicad may also be used where appropriate
Accurate field information is essential to the quality of the final BIM model
Students should think about how their field notes will translate into digital geometry
11. Professional Conduct on Site
The survey takes place in an active primary-school environment
Students must behave professionally and respectfully
Be mindful of pupils, teachers and school activities
Avoid disrupting the school's normal operation
Follow the agreed group structure and instructions
Treat the site and its occupants respectfully
Maintain a professional standard of communication and conduct throughout the visit
12. Submission & Timeline
Fieldwork takes place on October 7
Students will continue processing and organising their survey information after the site visit
Field notes are to be submitted during the period October 7–14
Final submission requirements will build on the collected survey information
Students should ensure that their documentation is complete before leaving the site
13. Key Takeaways
By the end of the preparation session, students should understand:
What is expected during the measured survey
How the fieldwork contributes to the BIM assignment
What equipment they need to bring
How groups should organise themselves
How to take accurate and verifiable measurements
How to produce useful field notes
Why photographs and sketches are important
How overlapping and triangulation improve accuracy
How field information will eventually become a Revit model
The importance of professional conduct on site
14. Before the Site Visit
Students should:
Confirm their group and assigned responsibilities
Ensure their Autodesk/Revit setup is working
Gather all required measuring and recording equipment
Review the measurement and field-note techniques covered in class
Plan how their group will divide the building
Arrive at UTech on time for the scheduled bus departure
Be prepared for a full four-hour survey session
Central Theme of the Session
A good BIM model begins with good field data.
The measured survey is not simply about collecting as many dimensions as possible. Students need to develop a systematic method of measuring, checking, recording and documenting information so that the data collected in the field can be reliably transformed into an accurate digital building model.
