Survey4BIM – Interoperability · Web viewSurvey4BIM – Geospatial Interoperability Big5...

9
1 Survey4BIM – Geospatial Interoperability Big5 geospatial challenges to Geo-Enable successful BIM level 2 Survey4BIM has identified the 5 techincal geo-spatial related challenges to successful implementation of BIM Level 2. Each of these 5 challenges is reviewed in terms of stage of maturity, it’s place on the BIM Road Map and how the survey industry can help. Overview of Geospatial Interoperability Challenge Interoperability & exchange of geospatial data varies dependent on the deliverable required and the software used. Survey4BIM believe this is broken down into two common issues. 1. Different file formats of data that must be consistent and usable for a variety of software formats. 2. Different Coordinate Reference Systems (CRS) being used are not translated or understood correctly (Figure 1). Big5 Challenges – Interoperability – Sep 2015

Transcript of Survey4BIM – Interoperability · Web viewSurvey4BIM – Geospatial Interoperability Big5...

Page 1: Survey4BIM – Interoperability · Web viewSurvey4BIM – Geospatial Interoperability Big5 geospatial challenges to Geo-Enable successful BIM level 2 Survey4BIM has identified the

1

Survey4BIM – Geospatial Interoperability

Big5 geospatial challenges to Geo-Enable successful BIM level 2

Survey4BIM has identified the 5 techincal geo-spatial related challenges to successful implementation of BIM Level 2. Each of these 5 challenges is reviewed in terms of stage of maturity, it’s place on the BIM Road Map and how the survey industry can help.

Overview of Geospatial Interoperability ChallengeInteroperability & exchange of geospatial data varies dependent on the deliverable required and the software used. Survey4BIM believe this is broken down into two common issues.

1. Different file formats of data that must be consistent and usable for a variety of software formats.

2. Different Coordinate Reference Systems (CRS) being used are not translated or understood correctly (Figure 1).

The UK industry is reactive and does not consider the wider potential of consistent geospatial data and consistent coordinate reference systems. The capability of geospatial enabled devices has evolved faster than the capability of the majority of the users of those devices.

Identifying and addressing these restrictions or commonalities will lead to consistent interoperability.

Big5 Challenges – Interoperability – Sep 2015

Page 2: Survey4BIM – Interoperability · Web viewSurvey4BIM – Geospatial Interoperability Big5 geospatial challenges to Geo-Enable successful BIM level 2 Survey4BIM has identified the

2

Maturity Stages – current and required for BIM Level 2Based on our Survey4BIM group experience we believe the current maturity level for interoperability of geo-spatial data in UK Industry is at stage 1 Maturity as per the diagram below.

Where should Geospatial Interoperability be on the BIM roadmapBased on our Survey4BIM group experience we believe the required Interoperability maturity needs to be available for BIM Level 2 currently. Has the industry moved from the exchange of plotted drawings to digital files, interoperability for format and grids became critical to achieving efficiency and effective data sharing.

Big5 Challenges – Interoperability – Sep 2015

Effort needed to support

BIM Level 2

March 2016

Stage 1Initial

Stage 2Managed

Stage 3Defined

Stage 4Quantitatively

Managed

Stage 5Optimising

Processes unpredictable,

Poorly controlled and reactive

Processes characterised

for projects and is often reactive

Processes characterised

for the organisation and

is proactive

Processes

measured and

controlled

Optimisation

Page 3: Survey4BIM – Interoperability · Web viewSurvey4BIM – Geospatial Interoperability Big5 geospatial challenges to Geo-Enable successful BIM level 2 Survey4BIM has identified the

3

How can Survey4BIM help ?

Headline Action Opportunity Interoperability Resource Support

Carry out a controlled test Yes InternalCarry out survey   InternalCollate existing forum/group activity   InternalCollate existing standards Yes Internal

Create Internal Workgroup Solution / Proposal 

InternalJoin and Influence existing forum/ group   ExternalProduce case study Yes InternalProduce Guidance Yes InternalSet challenge for software house Yes ExternalDevelop a detailed Road Map    Internal

What are the first steps – Internal and External?

We recommend the Survey4BIM Group should consider the following 2 priority actions as having the greatest impact in the immediate future

Big5 Challenges – Interoperability – Sep 2015

Backlogneeded to support

BIM 1

Page 4: Survey4BIM – Interoperability · Web viewSurvey4BIM – Geospatial Interoperability Big5 geospatial challenges to Geo-Enable successful BIM level 2 Survey4BIM has identified the

4

1) Set a challenge for the software house

2) Produce a case study

Big5 Challenges – Interoperability – Sep 2015

Page 5: Survey4BIM – Interoperability · Web viewSurvey4BIM – Geospatial Interoperability Big5 geospatial challenges to Geo-Enable successful BIM level 2 Survey4BIM has identified the

5

Appendix 1:

(How) How do we get there?The industry needs to be more aware of the issues surrounding Interoperability and the exchange of geospatial data.

1. The processes for data exchange need to be standardised for common usage.

2. Data consumers are generally not aware of the consequences of inconsistent data exchange.

3. Understanding coordinate systems and it’s place, and the impact on data exchange is key.

4. Utilising as much of the international work that has been completed to establish a baseline method, which will test the application to BIM is critical at this point. The theory and practice must be verified.

How can Survey4BIM help?We believe the members of the Survey4BIM group should consider actioning the following (in no particular order):

1. Different file formats of data need to be consistent and usable for a variety of software solutions based on multiple components of data definition: geometry, accuracy, spatial allocation, generalisation, entities. Survey4BIM needs to collate current data exchange formats and assess for commonality and suitability between data systems / environments (i.e. CAD, GIS, Database)

2. Survey4BIM should challenge the software houses to provide a common workflow route so that their geospatial data products pass data through their solution and can be used/ transferred/ translated into specific file formats for additional work in other software environments.

3. Specific tests should be undertaken to verify current file formats and tasks to see how data loss or degradation can be avoided, mitigated and understood Eg. XML/TXT etc.

4. Different coordinate reference systems being used in a project need to be translated correctly. Survey4BIM will work on explaining the issues and providing guidance on how this can be achieved. The group should look at the World coordinate system approaches as well as local and national coordinate systems.

5. Educational material related to positional data needs to be created and delivered covering the subject ranging from the value of postcode locations, to latitude/longitude, to local site grids that are accurate to the nearest millimetre.

Big5 Challenges – Interoperability – Sep 2015

Page 6: Survey4BIM – Interoperability · Web viewSurvey4BIM – Geospatial Interoperability Big5 geospatial challenges to Geo-Enable successful BIM level 2 Survey4BIM has identified the

6

6. This is a key discussion point. A postcode in a rural area is not a suitable method of navigation or storing GIS data. For example, the postcode PH18 5TZ, covers an area of 40 square miles.

7. In this case mobile phones using GPS to identify a location in rural areas would be more accurate and repeatable than postcodes. The issue for Survey4BIM is that data consumers are not fully aware of technical capabilities of existing technology or the pitfalls of using different location definitions such as postcodes or OS coordinates related to GNSS navigation systems.

Appendix 2:Premise – Why do this ?

The Survey4BIM Big 5 Issues are a set of subjects where the group believe there needs to be some technical focus on identifying issues and potential problems.

The result of this initiative will be that surveyors can contribute to the BIM process by proposing solutions and follow industry approved guidance for geospatial methods to add value to the BIM process.

This document discusses the current status of the issue. All references to Level are in relation to the Standard Maturity Model and the BIM maturity model

Why are we doing this? 1. Generate a joined up knowledge from across the Survey4BIM group.

2. Decide if the subject is something the group needs to get actively involved with and define existing Industry knowledge maturity as defined by the Standard Maturity Model

3. Become enablers of the solutions for the challenges identified.

4. Identify existing solutions for the subject and whether Survey4BIM need to keep a watching brief or adopt, create or align to new standards.

5. Highlight surveyors need for collaborating in the BIM process within other disciplines.

Who are we writing this for ? This is an internal document intended for the members of the Survey4BIM

technical and steering committees. It is written for them to consider issues as a call to action for it’s members or the wider survey community by broadening the base of the group

Big5 Challenges – Interoperability – Sep 2015

Page 7: Survey4BIM – Interoperability · Web viewSurvey4BIM – Geospatial Interoperability Big5 geospatial challenges to Geo-Enable successful BIM level 2 Survey4BIM has identified the

7

Appendix 2Discussion Points for Review Panel

Should we do an analysis of current software houses performance for geospatial data products interoperability / data preservation? – Should we write an exam question for them ? Could we get them to take on the task. (Action Peter Fowell)

Should systems be able to identify the master source of data ??? and the key components of “enhanced where”

Could we define the coordinate transformation rules for different systems and how that approach is identified in the data product .… OSTN02 defines this in many software solutions. Transformation is known. Often Geoid ellipsoid transformation is left out in GNSS based mapping software.

Interim97/07 – to review and utilise…. We need to be careful about how we code “levels” – describe it by a robust system

…. Classification

The CRS issues as explained by The Ordnance Survey

Figure 1 – OS Coordinates Explanation

Big5 Challenges – Interoperability – Sep 2015

Page 8: Survey4BIM – Interoperability · Web viewSurvey4BIM – Geospatial Interoperability Big5 geospatial challenges to Geo-Enable successful BIM level 2 Survey4BIM has identified the

8

Big5 Challenges – Interoperability – Sep 2015