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dssd 1.0.3

Enhancements

• Updated web site links

dssd 1.0.2

Bug Fixes

• Fixed Atlas bug by setting precision in Atlas environment wheninvalid shapes are detected.

Enhancements

• Enhanced message regarding strata names when they are provided butdo not match the number of strata.

dssd 1.0.1

Bug Fixes

• Removed dependence on rgdal

dssd 1.0.0

Bug Fixes

• Now accepts XYZ and XYM polygons (the Z and M information is removedwhen the region is created)

dssd 0.3.4

Enhancements

• Can store design parameters associated with segmented tracklinedesign for use with Distance for Windows (cannot generate transects forthis design within dssd)
• Now checks shapefiles for LinkID ordering if being used by Distancefor Windows

dssd 0.3.3

Enhancements

• Minor change to retain on CRAN and pass noLD testing

dssd 0.3.2

Enhancements

• Changed the default truncation distance to 50
• Remove dependency on 3Dplot (and therefore tcltk package)
• Minor code changes inline with CRAN coding policies

dssd 0.3.1

Bug Fixes

• Minor fix as dssd was erroneously displaying a warning aboutpossible unequal coverage when only a total number of samplers wassupplied. This was not always applicable.

dssd 0.3.0

New Features

• calculate.effort: calculates the estimated effort required in themain survey to achieve a given CV based on information from a pilotsurvey.
• Improved plotting using ggplot2.
• Added an example as to how to export transects to the GettingStarted vignette.
• Improved effort allocation documentation.

Bug Fixes

• Clarified in documentation and via warnings and error messages whenthere was confusion in the specification of designs.
• Fixed effort allocation when there is a mix of random and systematicpoint transect designs and the design parameter supplied is the totalnumber of samplers.
• Fixed effort allocation rounding when the total number of samplersis supplied for line transect designs. Previously it wasn’t rounded soit automatically used the floor value which results in less transectsthan requested.
• Fixed segmented transect bug which generated an error when segmentid’s were not sequential (sometimes happens after clipping and notretaining all transects)

dssd 0.2.2

• Exports the region class which is required for dsims

dssd 0.2.1

Bug Fixes

• Minor documentation and import changes to pass CRAN checks

dssd 0.2.0

New Features

• Segmented grid design
• Writes transects to gpx, csv and txt file
• Multi-strata vignette
• Coverage score statistics by stratum
• Option to run coverage simulation without progress counteroutput
• Plot and access coverage scores by stratum
• Use -1 to set a randomly generated design angle
• Updated Documentation

Bug Fixes

• Coordinate reference systems now stored in coverage and transectobjects
• Fixed invalid shapefiles: AreaRStrata and AreaRProjStrata

dssd 0.1.0

Enhancements

• Introducing the new Distance Sampling Survey Design package! Weprovide a number of survey design options which allow you to generatetransects for distance sampling surveys.
• Point transects: Simple random sampling
• Point transects: Systematic grid with random start point
• Line transects: Parallel random lines
• Line transects: Systematic parallel lines with a random start
• Line transects: Equal spaced zigzags with a random start
• Line transects: Equal spaced zigzags with complementary set ofzigzags
• Ability to vary design angle
• Survey generation by number of samplers, spacing or line length (cangenerate by different criteria in each strata)
• Ability to use different designs in each strata (as long as they areof the same type, i.e. all point or all line transects)
• Generate plus or minus sampling surveys
• Generate zigzag design inside minimum bounding rectangles (angledalong the design axis) or convex hulls
• Calculates the coverage of different design by simulation
• Produces summary statistics from the coverage design showing thevariability in number of samplers, line length, % coverage acrosssurveys from a given design