Table 3 Standard deviation ellipse parameters.

From: Spatial and temporal evolution and influencing factors of tourism eco-efficiency in Fujian province under the target of carbon peak

Year

Area (million/km2)

Minor semi axis (km)

Major semi axis (km)

Rotation (°)

Shape index

2011

7.972

0.978

1.529

24.104

0.640

2012

7.906

0.964

1.521

21.482

0.634

2013

7.797

0.958

1.495

22.800

0.641

2014

7.769

0.956

1.488

22.168

0.642

2015

7.821

0.963

1.497

22.704

0.643

2016

7.917

0.976

1.515

24.431

0.644

2017

8.004

0.989

1.530

28.315

0.646

2018

8.037

0.996

1.534

29.666

0.649

2019

8.037

0.997

1.533

30.931

0.650

2020

8.126

0.984

1.569

27.234

0.627