Saturday, May 23, 2020

Have you ever wondered how an Imray chart comes into being? Look no further than our video explaining the process!

Data from Hydrographic Offices is clipped to the desired extents and some formatting - the Imray style - is automatically applied.
The desired projection is also input so that further editing is applied for the correct scale.
The data is tidied up.
This involves editing features to ensure that the data is displaying correctly, is easy to understand and looks good with no clashes of detail.
Graphic styles may be changed to suit the scale of the chart and any unnecessary information is removed.
Some other changes are made at this stage to make it an Imray chart including adding additional facilities, anchorages and small-craft information, drawing on data from Imray cruising guides and expert contacts built up over many years.
15m and 30m depth contours are removed as well as various other features that are of little or no interest to yachtsmen.
Labels and soundings are carefully selected to suit the scale of the chart.
These are positioned to be clear and easy to read.
The scale of the chart and its purpose play a big part in this.
It is important to find the right balance between detail and clarity.
Marginalia and other "non data" elements of the chart are added after all other chart detail.
This is to help avoid obscuring the more important detail.
Adjoining chart outlines from the 2900 chart pack are added at this stage to help with use of the product.
The new edition of 2900 also includes chart outlines for the popular Antares large scale anchorage charts for convenient use for more adventurous users.
Useful contact details are compiled and added from pilot guides as well as chart notes.
The final product is compiled and is then ready to be sent for print, after rigorous checking!
Thanks to Jon from the charts team for providing the images and explanation of the processes he goes through.

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