Nautical charts digitization

Work description:
The work consists of digitizing the land areas, isobathymetric lines and bathymetry sounding points for six georeferenced nautical charts.

For each nautical chart the following features must be digitalized:
• Land – create a polygon for each land area in the nautical chart (sample is given)
• Isobathymetric lines – create a line feature for each isobathymetric line in the nautical chart, each line must have the corresponding depth value (sample is given)
• Bathymetry Sounding Point – create a point feature for each sounding point in the nautical chart, each point must have the corresponding depth value (sample is given)

The output files should be in esri shapefile format. The land areas must be a polygon shapefile, the isobathymetric lines must be a line shapefile and for the point features a point shapefile. Each shapefile must be in the same coordinate system of the corresponding nautical chart (this may differ on each nautical chart).

Each file must be clearly identified with the nautical chart source.

One chart completely digitized must be sent as soon as possible in order to speed up the revision process.

The time frame for completion of the work is one week after awarding the work.

References:
Provide references of similar work done in the last 5 years.

Payment (in Euros):
• 10% of the total requested amount will be paid after receiving one chart completely digitized.
• 70% of the total requested amount will be paid after receiving all charts completely digitized.
• 20% of the total requested amount will be paid after final acceptance of the work.

Proposal:
Send us:
• The amount required to do the work;
• The time frame for completion of the work;
• Eventual request for different payment conditions.

Documents made available:
The following sample files are made available now:
• A polygon shapefile for the land;
• A line shapefile for the Isobathymetric lines;
• A point shapefile for the bathymetry bounding point

The sample can be downloaded in the link: https://we.tl/t-C9EvTjLYxx

The following six documents will be made available after awarding the work:
• Nautical chart 216
• Nautical chart 218
• Nautical chart 220
• Nautical chart 222
• Nautical chart 223 (in the sample)
• Nautical chart 287

All the nautical charts are in geotif format (.tif).