Issue with gpkg rendering

[trip1]

First, I really enjoy working with the t-rex server, runs fast and really useful in generating our maps.

Only issue I seem to be having is with one gpkg file of the oceans. I'm taking the water polygon shape file from osm coastline and using ogr2ogr ogr2ogr -f GPKG water.gpkg water_polygons.shp to convert to gpkg files.

When inspecting both the shapefile and the gpkg file in qgis both render correctly with no issue. Not sure where I might have messed something up or if there's an issue rendering gpkg files with the full ocean polygon. Here's an example of the issue in rendering.

Here's my test config file:

# t-rex configuration

[service.mvt]
viewer = true

[[datasource]]
name = "ocean"
path = "water.gpkg"

[grid]
predefined = "web_mercator"

[[tileset]]
name = "planet"
minzoom = 2
maxzoom = 7

[[tileset.layer]]
name = "water"
datasource = "ocean"
table_name = "water_polygons"
geometry_field = "geom"
geometry_type = "POLYGON"

[cache.file]
base = "/tmp/layers"

[webserver]
# Bind address. Use 0.0.0.0 to listen on all adresses.
bind = "0.0.0.0"
port = 6767

[[webserver.static]]
path = "/static"
dir = "/tmp/layers"

[pka]

Thanks for the feedback, @trip1!

Never saw exactly this kind of artefacts before. Similar problems are are caused when reprojecting from WGS84 to Webmercator. Are you using the Mercator or the WGS84 shapefiles?

[trip1]

Fairly certain I'm using the Mercator files, but I can double check tomorrow. Would I need to specify the projection when converting shapefile to geopackage using ogr2ogr?

[trip1]

I tested both the mercator and wgs84 shape files without converting them and testing with reprojection on and off with both. Still had the same issue with artifacts showing up.