--- title: Location Intelligence Blog | Critchlow Geospatial | Geodesy description: Geodesy | Learn about all aspects of location intelligence on Critchlow Geospatial's blog and master your organisation's data and location-based challenges. --- [![Critchlow Geospatial New 2021](https://www.critchlow.co.nz/hs-fs/hubfs/Critchlow%20Geospatial%20New%202021.png?width=383&height=150&name=Critchlow%20Geospatial%20New%202021.png "Critchlow Geospatial New 2021")](https://www.critchlow.co.nz) [![Support](https://no-cache.hubspot.com/cta/default/340421/2f597e40-49d5-4b0b-aa09-cc3a2ff4597e.png)](https://cta-redirect.hubspot.com/cta/redirect/340421/2f597e40-49d5-4b0b-aa09-cc3a2ff4597e) [![Contact Us](https://no-cache.hubspot.com/cta/default/340421/274da7d9-4d03-4c53-b6d5-11e82a273c38.png)](https://cta-redirect.hubspot.com/cta/redirect/340421/274da7d9-4d03-4c53-b6d5-11e82a273c38) ** ** ** [![Critchlow Geospatial New 2021](https://www.critchlow.co.nz/hs-fs/hubfs/Critchlow%20Geospatial%20New%202021.png?width=5000&height=1956&name=Critchlow%20Geospatial%20New%202021.png "Critchlow Geospatial New 2021")](https://www.critchlow.co.nz) [![Support](https://no-cache.hubspot.com/cta/default/340421/2f597e40-49d5-4b0b-aa09-cc3a2ff4597e.png)](https://cta-redirect.hubspot.com/cta/redirect/340421/2f597e40-49d5-4b0b-aa09-cc3a2ff4597e) [![Contact Us](https://no-cache.hubspot.com/cta/default/340421/274da7d9-4d03-4c53-b6d5-11e82a273c38.png)](https://cta-redirect.hubspot.com/cta/redirect/340421/274da7d9-4d03-4c53-b6d5-11e82a273c38) ** ** ** Search **Menu** ** ** [![Support](https://no-cache.hubspot.com/cta/default/340421/2f597e40-49d5-4b0b-aa09-cc3a2ff4597e.png)](https://cta-redirect.hubspot.com/cta/redirect/340421/2f597e40-49d5-4b0b-aa09-cc3a2ff4597e) [![Contact Us](https://no-cache.hubspot.com/cta/default/340421/274da7d9-4d03-4c53-b6d5-11e82a273c38.png)](https://cta-redirect.hubspot.com/cta/redirect/340421/274da7d9-4d03-4c53-b6d5-11e82a273c38) # [**Critchlow Geospatial Blog](https://www.critchlow.co.nz/resources/blog) / Geodesy ## [Positioning geospatial data for the 21st Century - it’s time to switch to modern datums](https://www.critchlow.co.nz/resources/blog/modern-datums) by [Andrew Clouston, Senior Consultant](https://www.critchlow.co.nz/resources/blog/author/andrew-clouston-senior-consultant-bsurv-mgis-rpsurv-gisp-ap), on 08-Oct-2019 12:53:55 [![Positioning geospatial data for the 21st Century - it’s time to switch to modern datums](https://www.critchlow.co.nz/hubfs/shutterstock_1514227031%20datum%20movement.jpg)](https://www.critchlow.co.nz/resources/blog/modern-datums) The business case is clear for migrating from NZGD1949 to NZGD2000 and to use NZVD2016 Twenty years ago, Land Information New Zealand recognised that New Zealand needed to ensure that … [Read Story **](https://www.critchlow.co.nz/resources/blog/modern-datums) Topics:[Projection](https://www.critchlow.co.nz/resources/blog/topic/projection)[NZGD1949](https://www.critchlow.co.nz/resources/blog/topic/nzgd1949)[NZGD2000](https://www.critchlow.co.nz/resources/blog/topic/nzgd2000)[NZVD2016](https://www.critchlow.co.nz/resources/blog/topic/nzvd2016)[Positional accuracy](https://www.critchlow.co.nz/resources/blog/topic/positional-accuracy)[Elevation](https://www.critchlow.co.nz/resources/blog/topic/elevation)[Orthometric heights](https://www.critchlow.co.nz/resources/blog/topic/orthometric-heights)[Datum](https://www.critchlow.co.nz/resources/blog/topic/datum)[Geospatial](https://www.critchlow.co.nz/resources/blog/topic/geospatial)[Geodesy](https://www.critchlow.co.nz/resources/blog/topic/geodesy)[Vertical datum](https://www.critchlow.co.nz/resources/blog/topic/vertical-datum)[Clouston](https://www.critchlow.co.nz/resources/blog/topic/clouston)[Government](https://www.critchlow.co.nz/resources/blog/topic/government)[Telecommunications](https://www.critchlow.co.nz/resources/blog/topic/telecommunications) ** Prev [All Posts](https://www.critchlow.co.nz/resources/blog/all) Next ** ### About Critchlow Geospatial Critchlow Geospatial are Location Intelligence Specialists. 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