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Ground-truthing Saltmarsh Vegetation Communities with Mappt. Lindisfarne Island, UK

Tidal plant communities on Lindisfarne island mapped using image-based object analysis of drone imagery

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Lindisfarne is a tidal island located off the north-east coast of England covering 405 hectares (1,000 acres). Whilst small, measuring 4 km in width 2.5 km in length, the island habitats consist of thriving saltmarshes, sand dunes, and tidal mudflats.  The island is known as a spectacular habitat for viewing migrating birds.

The coastal salt marshes of Lindisfarne formed when salt tolerant plants colonised the adjoining intertidal areas. The region’s high tidal variation has created an environment endemic to the islands unique range of flora and fauna.

How Mappt Assists Uni Students in the Field

Post-graduate research students enrolled in an International Marine Environmental Consultancy course provided by Newcastle University, UK, successfully used UAV imagery and Mappt to identify saltmarsh vegetation communities around Lindisfarne Island.

Students used stratified random sampling to collect ground truth data in order to train predictive mapping models for object-based image analysis of drone imagery. Students identified eight vegetation communities for predictive mapping.  Method “C” was found to have the most successful prediction rate.

Tidal plant communities on Lindisfarne island mapped using image-based object analysis of drone imagery

Tidal plant communities on Lindisfarne island mapped using image-based object analysis of drone imagery

Vegetation Communities Identified for this study

Code & Salt Marsh Plant Community Name

SM13 Puccinellia maritima
SM14 Halimione portulacoides
SM15 Juncus maritimus-Triglochin maritima
SM16 Festuca rubra
SM28 Elymus repens
SM6 Spartina anglica
SM8 Annual Salicornia

 

For this study, Mappt was connected to a Trimble Catalsyt GNSS (via bluetooth) to stake out quadrats, navigate to sampling areas, and store field data.  *Mounting your tablet to the GPS pole as was done for this study is advantageous as it frees up your hands for other important tasks.  We like how Paula took advantage of soft soils to ‘plant’ her GPS and tablet while referring to her comprehensive list of 864 unique National Vegetation Classification sub community names.

Using Mappt in conjunction with Trimble GNSS to map tidal plant communities

Using Mappt in conjunction with Trimble GNSS to map tidal plant communities

Student feedback was overwhelmingly positive and included the following;  

Uploading shapefiles was easy

Sampling points when overlain on drone imagery were easy to navigate to  

Sampling points could be made invisible after data had been collected

Students Share Their Excitement for Using Mappt

Students Share Their Excitement for Using Mappt

Students at the university of Newcastle plan to use Mappt for their future projects such as; sand dune monitoring, rocky shore habitat mapping, and measuring the impact of activities such as bait collection from the intertidal area. In this way, Mappt is helping university students to map and collect data on-the-go effectively.

 

Mappt is available for free to educational institutions.  Here’s how to become an educational partner with Mappt.