MESH Confidence Assessment Tools

The MESH confidence assessment methodology has been built into two applications, each of which is best suited to a particular type of confidence assessment. For ease of data entry and comparison between multiple maps, we suggest using the MESH Confidence Scoresheet, an MS Excel workbook. For a more interactive tool which is best suited to the assessment of a single map, use the MESH Confidence Tool, built as a Flash application. This tool makes it easier to see the effects of changing individual scores and weightings. For those interested in the methodology but who will not be carrying out confidence assessments, the factors and scoring system are set out in scoring guidelines MESH Confidence Assessment Guidelines. The scoring guidelines are built into each application for quick reference. The MS Excel workbook and Flash application perform the scoring task in the same way. Select an image below to open one of the tools; further information about the tools can be found below.
 

                                       

MESH Confidence Scoresheet

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MESH Confidence Tool

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MESH Confidence Scoresheet

The workbook consists of the main sheet for entering factor scores, a weightings sheet (which performs some calculations whose results are returned to the scoresheet) and the scoring guidelines. Although the weightings sheet is available to view, it is strongly recommended that the weightings are not edited. For maps assessed by the MESH Project, a standard set of weightings is used for all maps. The scoring system is illustrated here using two examples. One (A) is from Sussex and this example is also referred to in How do I interpret my confidence assessment?. This is an ‘old’ survey using only AGDS and drop down video. The tracking was done with irregularly but generally widely spaced tracks. The surveys were undertaken over three years with very limited time and resources available. Thus, the survey should not expect to rate very highly in terms of confidence. The second example (B) is a recent survey of the Moray Firth using an interferometric swath system (bathymetry and side scan backscatter) and AGDS, combined together with towed video and grab sampling as ground truthing techniques. The coverage was 100% (swath) with a track spacing of 75-150m. Thus, it might be expected that this survey would have a higher confidence score.
 
GMHM5-17_confidence_scoresheet_table
 

MESH Confidence Tool

The Flash application is more interactive and has the scoring guidelines available for assistance on the right-hand pane in the window. In the version of the Flash application provided on the MESH website, the weightings column is not editable.
 
GMHM5-12_MESH_Confidence_tool
The MESH Confidence Tool was built as a Flash application. The scores and weightings of the factors are selected in the left-hand pane and the scoring guidelines are in the right-hand pane.
 
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