Calculates the meander length (wavelength) for each loop in the input `bankline_points` data frame.
meander_length(bankline_points)Returns a data frame of loops with the calculated meander length in units feet.
meander_length(fluvgeo::sin_bankline_points_sf)
#> [1] "Diagnostic report of bankline points"
#> [1] "Loop 1"
#> [1] " Apex: TRUE Route-M: 237.63"
#> [1] " last loop bank: "
#> [1] " current loop bank: right descending"
#> [1] " Bend 1"
#> [1] " Start: TRUE Route-M: 33.25"
#> [1] " End: TRUE Route-M: 296.39"
#> [1] " bank: right descending"
#> [1] " min_loop_m: 33.25"
#> [1] " max_loop_m: 296.39"
#> [1] " min_last_bend_m: 33.25"
#> [1] " max_last_bend_m: 296.39"
#> [1] " ** The Loop 1 apex point is located within the loop."
#> [1] "Loop 2"
#> [1] " Apex: TRUE Route-M: 572.41"
#> [1] " last loop bank: right descending"
#> [1] " current loop bank: left descending"
#> [1] " Bend 1"
#> [1] " Start: TRUE Route-M: 286.12"
#> [1] " End: TRUE Route-M: 482.15"
#> [1] " bank: left descending"
#> [1] " min_loop_m: 286.12"
#> [1] " max_loop_m: 482.15"
#> [1] " min_last_bend_m: 286.12"
#> [1] " max_last_bend_m: 482.15"
#> [1] " Bend 2"
#> [1] " Start: TRUE Route-M: 498.39"
#> [1] " End: TRUE Route-M: 720.69"
#> [1] " bank: left descending"
#> [1] " min_loop_m: 286.12"
#> [1] " max_loop_m: 720.69"
#> [1] " min_last_bend_m: 286.12"
#> [1] " max_last_bend_m: 482.15"
#> [1] " ** Bend 2 is upstream of Bend 1"
#> [1] " ** The Loop 2 apex point is located within the loop."
#> [1] " ** Loop 2 points are located on the opposite bank from Loop 1"
#> [1] "Loop 3"
#> [1] " Apex: TRUE Route-M: 998.08"
#> [1] " last loop bank: left descending"
#> [1] " current loop bank: right descending"
#> [1] " Bend 1"
#> [1] " Start: TRUE Route-M: 699.88"
#> [1] " End: TRUE Route-M: 888.34"
#> [1] " bank: right descending"
#> [1] " min_loop_m: 699.88"
#> [1] " max_loop_m: 888.34"
#> [1] " min_last_bend_m: 699.88"
#> [1] " max_last_bend_m: 888.34"
#> [1] " Bend 2"
#> [1] " Start: TRUE Route-M: 900.55"
#> [1] " End: TRUE Route-M: 1248.2"
#> [1] " bank: right descending"
#> [1] " min_loop_m: 699.88"
#> [1] " max_loop_m: 1248.2"
#> [1] " min_last_bend_m: 699.88"
#> [1] " max_last_bend_m: 888.34"
#> [1] " ** Bend 2 is upstream of Bend 1"
#> [1] " ** The Loop 3 apex point is located within the loop."
#> [1] " ** Loop 3 points are located on the opposite bank from Loop 2"
#> [1] "Loop 4"
#> [1] " Apex: TRUE Route-M: 1920.21"
#> [1] " last loop bank: right descending"
#> [1] " current loop bank: left descending"
#> [1] " Bend 1"
#> [1] " Start: TRUE Route-M: 1217.34"
#> [1] " End: TRUE Route-M: 1755.37"
#> [1] " bank: left descending"
#> [1] " min_loop_m: 1217.34"
#> [1] " max_loop_m: 1755.37"
#> [1] " min_last_bend_m: 1217.34"
#> [1] " max_last_bend_m: 1755.37"
#> [1] " Bend 2"
#> [1] " Start: TRUE Route-M: 1770.34"
#> [1] " End: TRUE Route-M: 2228.29"
#> [1] " bank: left descending"
#> [1] " min_loop_m: 1217.34"
#> [1] " max_loop_m: 2228.29"
#> [1] " min_last_bend_m: 1217.34"
#> [1] " max_last_bend_m: 1755.37"
#> [1] " ** Bend 2 is upstream of Bend 1"
#> [1] " ** The Loop 4 apex point is located within the loop."
#> [1] " ** Loop 4 points are located on the opposite bank from Loop 3"
#> [1] "Loop 5"
#> [1] " Apex: TRUE Route-M: 2629.73"
#> [1] " last loop bank: left descending"
#> [1] " current loop bank: right descending"
#> [1] " Bend 1"
#> [1] " Start: TRUE Route-M: 2325.57"
#> [1] " End: TRUE Route-M: 3048.42"
#> [1] " bank: right descending"
#> [1] " min_loop_m: 2325.57"
#> [1] " max_loop_m: 3048.42"
#> [1] " min_last_bend_m: 2325.57"
#> [1] " max_last_bend_m: 3048.42"
#> [1] " ** The Loop 5 apex point is located within the loop."
#> [1] " ** Loop 5 points are located on the opposite bank from Loop 4"
#> bank_POINT_X bank_POINT_Y bank_POINT_M DEM_Z valley_POINT_X valley_POINT_Y
#> 1 706325.1 4705331 237.6289 639.3160 706385.9 4705318
#> 2 706398.9 4705558 572.4144 640.8136 706348.1 4705496
#> 3 706173.5 4705569 998.0796 644.4735 706222.4 4705566
#> 4 706731.7 4706227 1920.2126 653.1224 706673.1 4706220
#> 5 706602.4 4706634 2629.7267 656.7055 706653.0 4706621
#> valley_POINT_M loop downstream_x downstream_y meander_length
#> 1 217.0688 1 706173.5 4705569 924.6888
#> 2 409.5599 2 706731.7 4706227 2450.4552
#> 3 567.5279 3 706602.4 4706634 3765.8430
#> 4 1386.5629 4 706602.4 4706634 1400.3007
#> 5 1792.4194 5 706602.4 4706634 0.0000