The geotiffs are New Brunswick Stereographic Double Projection. Each tar file contains all the mapsheets (gzipped) for that area (ex. map4466_geo will have all the mapsheets in the area described by 44 degrees north and 66 degrees west). There is a tfw (tif world file) for each tif mapsheet. The colour scale has been stretched between 0 (red) and 75 (purple) metres depth. Everything deeper than 75 m will be purple. The colour intensity is derived from a sun illumination at an azimuth of 315 degrees and elevation of 45 degrees. The sun illuminated imaged used had its histogram stretched to maximize dynamic range.

The ESRI grid files are also New Brunswick Stereographic Double Projection. They are binary, not ascii. Each tar file contains the mapsheets (gzipped) within the degree of latitude and longitude. The 'no data' value is -99999.999.

All files are 1 metre resolution, have 2800 columns and 3900 rows, and overlap with surrounding mapsheets. They are approximately 2 minutes of latitude by 2 minutes of longitude in size.

The numbering of the individual mapsheets starts from 0 at the bottom left of the 1 degree by 1 degree area. It increments to the east and loops back to the west end of the next row to the north. There are 30 x 30 (900) mapsheets in each 1 x 1 degree area, the bottom left being #0, bottom right #29, top left #870 top right #899.

There are currently some tidal and datum differences between data sets. This can be seen at the border between overlapping datasets. There were some navigation and time delay problems with the older EM1000 data that were fixed in the Spring of 2006.

map4466_geo.tar (93 MB)
map4467_geo.tar (21 MB)
map4566_geo.tar (208 MB)
map4567_geo.tar (115 MB)

map4466_esri.tar (165 MB)
map4467_esri.tar (44 MB)
map4566_esri.tar (383 MB)
map4567_esri.tar (228 MB)