20251217
13265900
1.0
ISO 19139 Metadata Implementation Specification GML3.2
FALSE
150000000
5000
Ground_compiled_FreeAir.ers
002
2235500.000000
2818500.000000
7225500.000000
7870500.000000
1
Projected
GCS_North_American_1983_CSRS
Linear Unit: Meter (1.000000)
NAD_1983_CSRS_New_Brunswick_Stereographic
<ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/10.8'><WKT>PROJCS["NAD_1983_CSRS_New_Brunswick_Stereographic",GEOGCS["GCS_North_American_1983_CSRS",DATUM["D_North_American_1983_CSRS",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Double_Stereographic"],PARAMETER["False_Easting",2500000.0],PARAMETER["False_Northing",7500000.0],PARAMETER["Central_Meridian",-66.5],PARAMETER["Scale_Factor",0.999912],PARAMETER["Latitude_Of_Origin",46.5],UNIT["Meter",1.0],AUTHORITY["EPSG",2953]]</WKT><XOrigin>-28216700</XOrigin><YOrigin>-23260100</YOrigin><XYScale>146555990.15834904</XYScale><ZOrigin>-100000</ZOrigin><ZScale>10000</ZScale><MOrigin>-100000</MOrigin><MScale>10000</MScale><XYTolerance>0.001</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><WKID>2036</WKID><LatestWKID>2953</LatestWKID></ProjectedCoordinateSystem>
32
FALSE
None
1
ER Mapper
FALSE
continuous
floating point
-999999
20251219
09025500
20251219
9033900
ISO19139
Amirabbas Karbalaeiramezanali
GSB
amirabbas.karbalaeiramezanali@gnb.ca
Serge Allard
GSB
Serge.Allard@gnb.ca
Serge Alard
Serge Allard
Serge Allard
Hernan Ugalde
hernan.ugalde@dipgeosciences.com
Version 6.2 (Build 9200) ; Esri ArcGIS 10.8.1.14362
Ground_compiled_FreeAir.ers
1
-70.170234
-62.082267
49.831386
43.959761
This dataset represents the Free Air gravity anomaly recalculated for ground gravity stations across New Brunswick.
This dataset represents the Free Air gravity anomaly recalculated for ground gravity stations across New Brunswick.The dataset provides Free Air anomaly values derived from reprocessed ground gravity measurements in New Brunswick. The Free Air anomaly corrects observed gravity for elevation above sea level and highlights broad regional variations in the gravity field related to large-scale crustal structure. This dataset serves as a foundational gravity product for geological interpretation and supports studies of crustal architecture, basin geometry, and regional density variations. It is provided in the NAD83 NB Stereographic double projection.The data originated from ground gravity stations downloaded from the GSC server and was reprocessed in September 2025. SRTM topography was sampled at each station location, and Free Air corrections were recalculated using the standard 0.3086 mGal per meter formula. Latitude corrections were applied, and the updated Free Air anomaly values were computed from the adjusted gravity measurements. The final values were exported in NAD83 NB Stereographic, producing the dataset.Data created Sept 2025.
NB Dept of Natural Resources, GSB Section
583
1000.000000
645
1000.000000
2
1
0
2235500.000000 7225500.000000
2235500.000000 7870500.000000
2818500.000000 7870500.000000
2818500.000000 7225500.000000
2527000.000000 7548000.000000
Band_1
140.201767
-91.664917
32
Raster Dataset
dataset
EPSG
6.2(9.3.0.0)
20251219
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