Massachusetts Salt Marsh Pools -- Version 1.0

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 pool_id Pool ID Unique identifier for each pool None area_m2 Pool Area Area of the pool Square meters complex Complex Name Name of the salt marsh complex None complex_id Complex ID Numeric identifier for the complex None s2_slope Sentinel-2 NDWI Slope Temporal trend in NDWI from Sentinel-2 Per day s2_pval Sentinel-2 P-value Statistical significance of S2 NDWI trend None s2_corr Sentinel-2 Water Correlation Correlation between S2 NDWI and water level Correlation coefficient s2_cpval Sentinel-2 Correlation P-value Statistical significance of S2 correlation None s2_npix Sentinel-2 Pixel Count Number of pixels used in S2 analysis Count s2_nobs Sentinel-2 Observations Number of valid S2 observations Count lndst_slope Landsat NDWI Slope Temporal trend in NDWI from Landsat (all dates) Per day lndst_pval Landsat P-value Statistical significance of Landsat NDWI trend None lndst_corr Landsat Water Correlation Correlation between Landsat NDWI and water level Correlation coefficient lndst_cpval Landsat Correlation P-value Statistical significance of Landsat correlation None lndst_npix Landsat Pixel Count Number of pixels used in Landsat analysis Count lndst_nobs Landsat Observations Number of valid Landsat observations Count ln15_slope Landsat Post-2015 NDWI Slope Temporal trend in NDWI from Landsat (2015-present) Per day ln15_pval Landsat Post-2015 P-value Statistical significance of post-2015 trend None ln15_corr Landsat Post-2015 Water Correlation Correlation between post-2015 NDWI and water level Correlation coefficient ln15_cpval Landsat Post-2015 Correlation P-value Statistical significance of post-2015 correlation None ln15_npix Landsat Post-2015 Pixel Count Number of pixels used in post-2015 analysis Count ln15_nobs Landsat Post-2015 Observations Number of valid post-2015 observations Count s1_vv_slp Sentinel-1 VV Slope Temporal trend in VV backscatter Per day s1_vv_pvl Sentinel-1 VV P-value Statistical significance of VV trend None s1_vv_cor Sentinel-1 VV Water Correlation Correlation between VV and water level Correlation coefficient s1_vv_cpv Sentinel-1 VV Correlation P-value Statistical significance of VV correlation None s1_vh_slp Sentinel-1 VH Slope Temporal trend in VH backscatter Per day s1_vh_pvl Sentinel-1 VH P-value Statistical significance of VH trend None s1_vh_cor Sentinel-1 VH Water Correlation Correlation between VH and water level Correlation coefficient s1_vh_cpv Sentinel-1 VH Correlation P-value Statistical significance of VH correlation None s1_vh_vv_slp Sentinel-1 VH/VV Ratio Slope Temporal trend in VH/VV ratio Per day s1_vh_vv_cor Sentinel-1 VH/VV Water Correlation Correlation between VH/VV and water level Correlation coefficient s1_vv_vh_slp Sentinel-1 VV-VH Difference Slope Temporal trend in VV-VH difference Per day s1_vv_vh_cor Sentinel-1 VV-VH Water Correlation Correlation between VV-VH and water level Correlation coefficient s1_ndpi_slp Sentinel-1 NDPI Slope Temporal trend in Normalized Difference Polarization Index Per day s1_ndpi_cor Sentinel-1 NDPI Water Correlation Correlation between NDPI and water level Correlation coefficient lidar_mean LiDAR Mean Elevation Mean elevation within 1m buffer of pool Meters lidar_med LiDAR Median Elevation Median elevation within 1m buffer of pool Meters lidar_std LiDAR Elevation StdDev Standard deviation of elevation within 1m buffer Meters lidar_npix LiDAR Pixel Count Number of LiDAR pixels in buffer analysis Count