CSPs: Distances between CSPs (in km) based on GPS information

Usage Rights

This data is Free for public.

Permission is granted to anybody to access, use and publish all open for public data freely. The commercial use of any data is prohibited. The quality and completeness of data cannot be guaranteed. Users employ these data at their own risk. In order to make attribution of use for owners of the data possible, the identifier of ownership of data must be retained with every data record. Users must publicly acknowledge, in conjunction with the use of the data, the data owners.

Cite the data as follows:

Eichenberg, D. (2015): CSPs: Distances between CSPs (in km) based on GPS information. (Accessed through URL: http://china.befdata.biow.uni-leipzig.de/datasets/484)

Dataset Abstract

This dataset provides a distance matrix wich gives the distances between the CSPs in the Gutianshan National Nature reserve (29º8'18" – 29º17'29" N, 118º2'14" – 118º11'12" E, Zhejiang Province Southeast China). The distances are based on the spatial information available from the dataset "Comparative study plot (CSP) information to be shared with all BEF-China scientists" (http://china.befdata.biow.uni-leipzig.de/datasets/205). Be aware that for some CSPs (CSP4, CSP12) the accuracy of the GPS information may not be very high due to the high in-site spatial heterogeneity and dense canopy-cover.
The distances were calculated in km using the function rdist.earth() in R (library: fields). For the calculation of distances, the earth's radius was set to mean earth's radius (6371km, default for function= 6378.4km at equator) to correct for the fact that the earth is not a perfect sphere. Only the lower triangle of the matrix is given here, as the upper triangle contains redundant information.

Dataset Design

According the the metadata given in the dataset "Comparative study plot (CSP) information to be shared with all BEF-China scientists" (http://china.befdata.biow.uni-leipzig.de/datasets/205) 27 CSPs were established between May and July 2008. Species recording was performed between May and October 2008 with several visits per plot. Each CSP has a size of 30 m by 30 m. The corners of every CSP were permanently marked with magnets. Spatial information was collected using geko 201. It is unclear wheter every GPS information for each CSP comes from the south-west corner of the CSP. However, for the purpose of calculationg rough distances between the CSps the data can be judged to be of sufficient accuracy.

Measurement Circumstances

Be aware that for some CSPs (CSP4, CSP12) the accuracy of the GPS information may not be very high due to the high in-site spatial heterogeneity and dense canopy-cover.
It is unclear wheter every GPS information for each CSP comes from the south-west corner of the CSP. However, for the purpose of calculationg rough distances between the CSps the data can be judged to be of sufficient accuracy.

Data Analysis

This matrix can be used as additional information and covariate for spatial analyses on the CSPs.
If a mean distance between all CSPs is required: 3.402 km
(this can be directly extracted from the dataset in R using the following function (available in the library: gdata):
mean(lowerTriangle(([,2:28],diag=F))
where is the R object to which the dataset was imported.)

Data columns available in the raw data part of this dataset

Plot
Cormparative Study Plot of the BEF-China Experiment. Comparative Study Plots (CSP) in the Gutianshan Nature Reserve (29º8'18" – 29º17'29" N, 118º2'14" – 118º11'12" E, Zhejiang Province Southeast China), having a size of 30x30m^2, measured on the ground. Plots were assigned to five strata according to the average age of tree layer individuals (1: < 20 yrs, 2: < 40 yrs, 3: < 60 yrs, 4: < 80 yrs, 5: > 80 yrs). Information on plot age can be obtained from the dataset "Comparative study plot (CSP) information to be shared with all BEF-China scientists" (http://china.befdata.biow.uni-leipzig.de/datasets/205).
Data group: BEF research plot name
Keywords: CSP, Gutianshan
Values
CSP01
CSP02
CSP04
CSP05
CSP03
CSP01
This column indicates the distance to the respective CSP in the respective row. Comparative Study Plot 1 Coodinates: longitude: 118.11587 (E), latitude: 29.23957 (N).
Unit: km
Data group: Helper
Keywords: CSP, location, latitude, longitude, distance
Values
0.794815432
0.575475146
0.749068583
0.428800714
0
CSP02
This column indicates the distance to the respective CSP in the respective row. Comparative Study Plot 2 Coodinates: longitude: 118.13484 (E), latitude: 29.24926 (N).
Unit: km
Data group: Helper
Values
0
0.908938665
0.038583345
0.268334448
0.36686408
CSP03
This column indicates the distance to the respective CSP in the respective row. Comparative Study Plot 3 Coodinates: longitude: 118.12402 (E), latitude: 29.23885 (N).
Unit: km
Data group: Helper
Keywords: CSP, location, distance, GPS
Values
1.189907044
1.120634825
1.122697004
0.703971321
0
CSP04
This column indicates the distance to the respective CSP in the respective row. Comparative Study Plot 4 Coodinates: longitude: 118.12015 (E), latitude: 29.24963 (N).
Unit: km
Data group: Helper
Values
0.659003627
0.532189414
0
0.171865353
0.830113904
CSP05
This column indicates the distance to the respective CSP in the respective row. Comparative Study Plot 5 Coodinates: longitude: 118.1122 (E), latitude: 29.24687 (N).
Unit: km
Data group: Helper
Values
0.394180629
0.540197621
0.471977334
0
0.67483491
CSP06
This column indicates the distance to the respective CSP in the respective row. Comparative Study Plot 6 Coodinates: longitude: 118.14747 (E), latitude: 29.25497 (N).
Unit: km
Data group: Helper
Values
0
0.502771306
1.412533589
1.341538827
1.069518585
CSP07
This column indicates the distance to the respective CSP in the respective row. Comparative Study Plot 7 Coodinates: longitude: 118.14373 (E), latitude: 29.25184 (N).
Unit: km
Data group: Helper
Values
0.871363415
1.375685075
1.99818183
0.913311016
1.264546938
CSP08
This column indicates the distance to the respective CSP in the respective row. Comparative Study Plot 8 Coodinates: longitude: 118.11019 (E), latitude: 29.24106 (N).
Unit: km
Data group: Helper
Values
0.321257808
1.034665315
0
0.361261604
0.825010802
CSP09
This column indicates the distance to the respective CSP in the respective row. Comparative Study Plot 9 Coodinates: longitude: 118.11337 (E), latitude: 29.24275 (N).
Unit: km
Data group: Helper
Values
1.122979966
0.499438407
1.109071359
0
0.48139942
CSP10
This column indicates the distance to the respective CSP in the respective row. Comparative Study Plot 10 Coodinates: longitude: 118.15791 (E), latitude: 29.25188 (N).
Unit: km
Data group: Helper
Values
2.186664667
3.206659531
0
2.622268253
2.221813131
CSP11
This column indicates the distance to the respective CSP in the respective row. Comparative Study Plot 11 Coodinates: longitude: 118.13647 (E), latitude: 29.27383 (N).
Unit: km
Data group: Helper
Values
2.714929752
0
2.973631471
2.791836262
3.063170264
CSP12
This column indicates the distance to the respective CSP in the respective row. Comparative Study Plot 12 Coodinates: longitude: 118.1219 (E), latitude: 29.24939 (N).
Unit: km
Data group: Helper
Values
1.288406839
0.889019793
0
0.538852584
0.650232918
CSP13
This column indicates the distance to the respective CSP in the respective row. Comparative Study Plot 13 Coodinates: longitude: 118.11621 (E), latitude: 29.2463 (N).
Unit: km
Data group: Helper
Values
1.475657339
0.83337089
0
1.659540023
0.82477732
CSP14
This column indicates the distance to the respective CSP in the respective row. Comparative Study Plot 14 Coodinates: longitude: 118.13518 (E), latitude: 29.24944 (N).
Unit: km
Data group: Helper
Values
1.130548895
0
2.694330013
0.274602134
0.400839212
CSP15
This column indicates the distance to the respective CSP in the respective row. Comparative Study Plot 15 Coodinates: longitude: 118.13106 (E), latitude: 29.24917 (N).
Unit: km
Data group: Helper
Values
0
3.13465544
0.536534553
0.76838614
2.300754377
CSP16
This column indicates the distance to the respective CSP in the respective row. Comparative Study Plot 16 Coodinates: longitude: 118.09966 (E), latitude: 29.24253 (N).
Unit: km
Data group: Helper
Values
3.566856284
3.615045603
2.438323704
0
0.842179826
CSP17
This column indicates the distance to the respective CSP in the respective row. Comparative Study Plot 17 Coodinates: longitude: 118.10828 (E), latitude: 29.24342 (N).
Unit: km
Data group: Helper
Values
4.02660116
2.7250203
1.596147945
3.693838025
3.423767631
CSP18
This column indicates the distance to the respective CSP in the respective row. Comparative Study Plot 18 Coodinates: longitude: 118.12461 (E), latitude: 29.24516 (N).
Unit: km
Data group: Helper
Values
3.188714785
0
3.378942347
3.511519123
1.130475028
CSP19
This column indicates the distance to the respective CSP in the respective row. Comparative Study Plot 19 Coodinates: longitude: 118.08389 (E), latitude: 29.28045 (N).
Unit: km
Data group: Helper
Values
6.273834743
0.761596534
0
0.414910861
1.135591421
CSP20
This column indicates the distance to the respective CSP in the respective row. Comparative Study Plot 20 Coodinates: longitude: 118.08803 (E), latitude: 29.28139 (N).
Unit: km
Data group: Helper
Values
8.077998258
1.38870675
6.020341632
0
0.55274705
CSP21
This column indicates the distance to the respective CSP in the respective row. Comparative Study Plot 21 Coodinates: longitude: 118.09066 (E), latitude: 29.27698 (N).
Unit: km
Data group: Helper
Values
1.188314611
0
7.71644874
7.345845546
5.959307805
CSP22
This column indicates the distance to the respective CSP in the respective row. Comparative Study Plot 22 Coodinates: longitude: 118.13723 (E), latitude: 29.2145 (N).
Unit: km
Data group: Helper
Values
8.124484027
7.747740069
0
7.526511585
5.516667548
CSP23
This column indicates the distance to the respective CSP in the respective row. Comparative Study Plot 23 Coodinates: longitude: 118.13469 (E), latitude: 29.21483 (N).
Unit: km
Data group: Helper
Values
0.249224704
1.522371034
3.625651149
0
0.624010992
CSP24
This column indicates the distance to the respective CSP in the respective row. Comparative Study Plot 24 Coodinates: longitude: 118.13155 (E), latitude: 29.21713 (N).
Unit: km
Data group: Helper
Values
0.397832435
1.275260149
0
3.589574999
NA
CSP25
This column indicates the distance to the respective CSP in the respective row. Comparative Study Plot 25 Coodinates: longitude: 118.13155 (E), latitude: 29.21713 (N).
Unit: km
Data group: Helper
Values
0
1.001946452
3.359894666
NA
CSP26
This column indicates the distance to the respective CSP in the respective row. Comparative Study Plot 26 Coodinates: longitude: 118.12155 (E), latitude: 29.21489 (N).
Unit: km
Data group: Helper
Values
NA
3.847010413
0
CSP27
This column indicates the distance to the respective CSP in the respective row. Comparative Study Plot 27 Coodinates: longitude: 118.13605 (E), latitude: 29.24709 (N).
Unit: km
Data group: Helper
Values
NA
0