has a number of chart servers. These include:
- MariWeb™ proprietary chart server (used for small systems only)
- OpenGIS chart server
- Google Map
- S63 capable third party chart server
- Third party ECDIS systems
The chart server implemented on any particular system is dependent on the customers requirements. IMIS Global Limited would normally recommend the OpenGIS chart server that is able to display vector and raster charts in the WGS84 standard. Vector formats include GML, S57 and ESRI and raster formats include GeoTIFF, JPG and GIF.
The OpenGIS chart server serves charts according to the area being viewed allowing for an area to be selected and for the user to zoom in and out of the selected area. Where a raster chart is used, the resolution is limited by the pixilation of the raster chart and the accuracy cannot be any better than the original paper chart or other data from which the raster image was generated.
Vector charts (S57) have an accuracy dependent on when the chart data was captured and with the accuracy this S57 data was captured.
The MariWeb™ OpenGIS chart server requires un-encrypted S57 charts. These can be updated at any time ensuring that the most accurate GIS information is available at any time to the user of the MariWeb™ system.
Where S63 charts are required, a third party chart server is integrated and delivered along with the MariWeb™ system.