Massachusetts Salt Marsh Pools -- Version 3.0

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 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