BioBase Data Use in QGIS 3.X
Tutorial: Converting BioBase grids to raster
© Navico, Inc. 2019
Export Depth, Vegetation, or Bottom Hardness (Composition) Grid Data from your BioBase account.
Data are exported as comma delimited point features in the universal WGS84 global coordinate system (right-click data in browser save as .csv)
Add X,Y Data and specify the WGS84 coordinate system
The view of unprojected ciBioBase grid data
Project the data into a meter projection (UTM is pretty standard) in the Data Frame Properties. Make sure you use the correct local datum (e.g.,
NAD83 Zone 15N for Minnesota USA)
http://www.ems-i.com/
If using UTMs NAD83 Datum, consult this chart to determine your zone (US Only). Datum vary widely across the globe; use one that is in accordance with
your local standard
Change the Display to Meters
Project the Data Frame into the appropriate local projection and datum
Right click and export to .shp. Save the data in the projection of the projected Data Frame
measure grid cell size using the measure line tool;
Rasterize Tool;
Actual individual cell sizes in BioBase vary. Overestimating actual grid cell sizes will result in blurry and inaccurate output. Underestimating will result in
empty space in between cells
The conversion to raster is complete! Now a range of spatial data analyses can be conducted. To create
publication quality imagery see the “Creating Publishable Quality Imagery” tutorial