| Section 1: Geoid Model |
| 1. |
What are your applications and activities within your organization that require the use of benchmarks or a geoid model (You can check more than one)?
Establishment of new vertical control stations (benchmarks)
Validation of GPS procedures at benchmarks
Mapping (cartography, DEM, LiDAR, photogrammetry, etc)
Engineering (road, bridge, dam, etc)
Water management (flood, drainage, irrigation, rate of flow, etc)
Oceanography (sea surface topography, tide gauges, storm surge, etc)
Scientific (geophysics, satellite calibration, sea level rise, etc)
Recreation (hiking, personal use, etc)
Others/details
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| 2. |
What precision do you require in order to make use of geoid heights or geoid height differences?
Others
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| 3. |
Which enhancements should we make to software GPS-H v2.1?
More flexibility in terms of input and output formats
Allow transformation from orthometric heights to ellipsoidal heights
Give absolute accuracy
Give relative accuracy
Allow batch processing for really large data input
Make source code available
Others
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| 4. |
Do you require more information/training regarding the use of a geoid model (e.g. CGG2005) and/or Height Transformation (e.g. HT v2.0)? |
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Yes |
No |
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Technical information: |
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Guidelines document: |
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Training: |
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| Section 2: Height Modernization |
| 1. |
What are the impacts on your organization with respect to NRCan implementing a new vertical datum, which will be realized by a geoid model?
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| 2. |
What are the impacts on your organization that NRCan does not maintain levelling networks in Canada, i.e., that most benchmarks will not be replaced when they are destroyed?
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| 3. |
What are the risks, impediments or legal implications in your jurisdiction of changing the vertical datum? For the new vertical datum, the local height differences will remain basically the same as CGVD28; however, the absolute heights may change by -35 cm to +75 cm depending on your location in Canada.
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| 4. |
What might be the requirements within your organization for a smooth transition to the modernized height system in terms of tools, software, communication and training/education?
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