DOI: 10.5281/zenodo.16747937
title: Massachusetts Salt Marsh Pools -- Version 3.0

description: Preliminary data estimating the location and extent of detected salt marsh pools in Massachusetts. Pool geometries are extracted using NAIP imagery data. Shapefile also contains relevant geometric data and supplemental LiDAR, Sentinel 1, Sentinel 2, and Landsat data extracted at each pool polygon.

Pool shapes below 10m are not considered due to resolution contraints.

Shapefile fields and descriptions below:

 

    


Field_Name
Full_Name
Description
Units
Data_Type


pool_id
Pool ID
Unique identifier for each pool
None
String


area_m2
Pool Area
Area of the pool
Square meters
Float


complex
Complex Name
Name of the salt marsh complex
None
String


complex_id
Complex ID
Numeric identifier for the complex
None
Integer


s2_slope
Sentinel-2 NDWI Slope
Temporal trend in NDWI from Sentinel-2
Per day
Float


s2_pval
Sentinel-2 P-value
Statistical significance of S2 NDWI trend
None
Float


s2_corr
Sentinel-2 Water Correlation
Correlation between S2 NDWI and water level
Correlation coefficient
Float


s2_cpval
Sentinel-2 Correlation P-value
Statistical significance of S2 correlation
None
Float


s2_npix
Sentinel-2 Pixel Count
Number of pixels used in S2 analysis
Count
Integer


s2_nobs
Sentinel-2 Observations
Number of valid S2 observations
Count
Integer


s2_bsln
Sentinel-2 Baseline NDWI
Mean NDWI from first 10% of observations
NDWI
Float


s2_pctyr
Sentinel-2 Percent Change/Year
Annual percent change in NDWI
Percent per year
Float


lndst_slope
Landsat NDWI Slope
Temporal trend in NDWI from Landsat (all dates)
Per day
Float


lndst_pval
Landsat P-value
Statistical significance of Landsat NDWI trend
None
Float


lndst_corr
Landsat Water Correlation
Correlation between Landsat NDWI and water level
Correlation coefficient
Float


lndst_cpval
Landsat Correlation P-value
Statistical significance of Landsat correlation
None
Float


lndst_npix
Landsat Pixel Count
Number of pixels used in Landsat analysis
Count
Integer


lndst_nobs
Landsat Observations
Number of valid Landsat observations
Count
Integer


lndst_bsln
Landsat Baseline NDWI
Mean NDWI from first 10% of observations
NDWI
Float


lndst_pctyr
Landsat Percent Change/Year
Annual percent change in NDWI
Percent per year
Float


ln15_slope
Landsat Post-2015 NDWI Slope
Temporal trend in NDWI from Landsat (2015-present)
Per day
Float


ln15_pval
Landsat Post-2015 P-value
Statistical significance of post-2015 trend
None
Float


ln15_corr
Landsat Post-2015 Water Correlation
Correlation between post-2015 NDWI and water level
Correlation coefficient
Float


ln15_cpval
Landsat Post-2015 Correlation P-value
Statistical significance of post-2015 correlation
None
Float


ln15_npix
Landsat Post-2015 Pixel Count
Number of pixels used in post-2015 analysis
Count
Integer


ln15_nobs
Landsat Post-2015 Observations
Number of valid post-2015 observations
Count
Integer


ln15_bsln
Landsat Post-2015 Baseline NDWI
Mean NDWI from first 10% of post-2015 observations
NDWI
Float


ln15_pctyr
Landsat Post-2015 Percent Change/Year
Annual percent change in NDWI post-2015
Percent per year
Float


s1_vv_slp
Sentinel-1 VV Slope
Temporal trend in VV backscatter
Per day
Float


s1_vv_pvl
Sentinel-1 VV P-value
Statistical significance of VV trend
None
Float


s1_vv_cor
Sentinel-1 VV Water Correlation
Correlation between VV and water level
Correlation coefficient
Float


s1_vv_cpv
Sentinel-1 VV Correlation P-value
Statistical significance of VV correlation
None
Float


s1_vv_bas
Sentinel-1 VV Baseline
Mean VV from first 10% of observations
dB
Float


s1_vv_pct
Sentinel-1 VV Percent Change/Year
Annual percent change in VV backscatter
Percent per year
Float


s1_vh_slp
Sentinel-1 VH Slope
Temporal trend in VH backscatter
Per day
Float


s1_vh_pvl
Sentinel-1 VH P-value
Statistical significance of VH trend
None
Float


s1_vh_cor
Sentinel-1 VH Water Correlation
Correlation between VH and water level
Correlation coefficient
Float


s1_vh_cpv
Sentinel-1 VH Correlation P-value
Statistical significance of VH correlation
None
Float


s1_vh_bas
Sentinel-1 VH Baseline
Mean VH from first 10% of observations
dB
Float


s1_vh_pct
Sentinel-1 VH Percent Change/Year
Annual percent change in VH backscatter
Percent per year
Float


s1_vh_vv_slp
Sentinel-1 VH/VV Ratio Slope
Temporal trend in VH/VV ratio
Per day
Float


s1_vh_vv_cor
Sentinel-1 VH/VV Water Correlation
Correlation between VH/VV and water level
Correlation coefficient
Float


s1_vh_vv_bas
Sentinel-1 VH/VV Baseline
Mean VH/VV ratio from first 10% of observations
Ratio
Float


s1_vh_vv_pct
Sentinel-1 VH/VV Percent Change/Year
Annual percent change in VH/VV ratio
Percent per year
Float


s1_vv_vh_slp
Sentinel-1 VV-VH Difference Slope
Temporal trend in VV-VH difference
Per day
Float


s1_vv_vh_cor
Sentinel-1 VV-VH Water Correlation
Correlation between VV-VH and water level
Correlation coefficient
Float


s1_vv_vh_bas
Sentinel-1 VV-VH Baseline
Mean VV-VH from first 10% of observations
dB
Float


s1_vv_vh_pct
Sentinel-1 VV-VH Percent Change/Year
Annual percent change in VV-VH difference
Percent per year
Float


s1_ndpi_slp
Sentinel-1 NDPI Slope
Temporal trend in Normalized Difference Polarization Index
Per day
Float


s1_ndpi_cor
Sentinel-1 NDPI Water Correlation
Correlation between NDPI and water level
Correlation coefficient
Float


s1_ndpi_bas
Sentinel-1 NDPI Baseline
Mean NDPI from first 10% of observations
NDPI
Float


s1_ndpi_pct
Sentinel-1 NDPI Percent Change/Year
Annual percent change in NDPI
Percent per year
Float


lidar_mean
LiDAR Mean Elevation
Mean elevation within 2m buffer of pool
Meters
Float


lidar_med
LiDAR Median Elevation
Median elevation within 2m buffer of pool
Meters
Float


lidar_std
LiDAR Elevation StdDev
Standard deviation of elevation within 2m buffer
Meters
Float


lidar_npix
LiDAR Pixel Count
Number of LiDAR pixels in buffer analysis
Count
Integer