Information about archived ice data
Daily Ice Charts
Ice analysis charts are produced in accordance with Canadian Coast Guard requirements. They are operational charts and are only amended or corrected up to 6 pm on the day of issue. After that, no further quality control is done on the chart. These are available in Graphics Interchange Format.
Daily ice chart extents:
Arctic Ocean
Western Arctic
Waterways
High Arctic
Eastern Arctic
Hudson Bay
Newfoundland
Gulf of St. Lawrence
Great Lakes
Regional Ice Charts
The Canadian Ice Service produces ice charts on a weekly basis on a regional scale for Canadian coastal waters. These are available in Graphics Interchange Format and E00 format. The ArcInfo E00 file can be imported in a geographic information system software (e.g. ArcGIS). Each coverage contains all of the information contained within the 'egg code' which has been split into individual fields for each egg attribute.
Regional ice chart extents
Projection Information
Projection: Lambert Conformal Conic
Units: Metres
Spheroid: Clarke 1866
Datum: NAD27
1st Standard Parallel: 49 0 0.000
2nd Standard Parallel: 77 0 0.000
Central Meridian: -100 0 0.000
Latitude of Projections Origin: 40 0 0.000
False Easting: 0.000
False Northing: 0.00
Parameters
Information regarding the coverage's projection may be found in the *.prj file contained within the coverage directory and may be read using any kind of text editor.
Attribute Information
| Field Name | Fast Ice Polygon | Ice Egg Polygon | Land Polygon | Description |
| AREA | 802496.00 | 5.82 e^10 | 10.89 e^10 | Area of polygon |
| PERIMETER | 3085864.25 | 2254366.00 | 8640489.00 | Perimeter of polygon |
| N_980126# | 3 | 8 | 58 | Internal arc code |
| N_980126-ID | 3 | 8 | 58 | Internal arc code |
| A_LEGEND | Fast ice | Attached egg | Land | Legend name |
| REGION | CE | CE | CE | Name of region: |
| BH/HB = Baie d'Hudson (Hudson Bay) | ||||
| AE/EA = Arctique de l'Est (Eastern Arctic) | ||||
| AO/WA = Arctique de l'Ouest (Western Arctic) | ||||
| CE/EC = Côte Est (Eastern Coast) | ||||
| DATE_CARTE | 19981201 | 19981201 | 19981201 | Ice chart date (YYYYMMDD) |
| SOURCE | EGG | Egg or ratio | ||
| MOD | Data modified ("X" = modified) | |||
| EGG_ID | 0 | 0 | 0 | Internal egg id |
| PNT_TYPE | 106 | 118 | 900 | Unique label id for polygon features |
| EGG_NAME | Q | Name of egg | ||
| EGG_SCALE | 0 | 0 | 0 | Internal code |
| EGG_ATTR | 9+_3_4_3_ | String value for egg | ||
| @_7._1._7_ | Attributes | |||
| 5_@_@_3_3_ | ||||
| 3_@_@_@ | ||||
| USER_ATTR | 9+_3_4_3_ | String value for egg | ||
| @_7_1._7_ | Attributes | |||
| 5_@_@_3_3_ | ||||
| 3_@_@_@ | ||||
| ROTATION | 0 | 0 | 0 | Internal code |
| E_CT | 9+ | Total concentration | ||
| E_CA | 3 | Partial concentration of column a | ||
| E_CB | 4 | Partial concentration of column b | ||
| E_CC | 3 | Partial concentration of column c | ||
| E_CD | Partial concentration of column d | |||
| E_SO | 7 | Stage of development of ice found in traces | ||
| E_SA | 1 | Stage of development of column a | ||
| E_SB | 7 | Stage of development of column b | ||
| E_SC | 5 | Stage of development of column c | ||
| E_SD | Stage of development of column d | |||
| E_SE | Stage of development of column e | |||
| E_FA | 3 | Floe size of column a | ||
| E_FB | 3 | Floe size of column b | ||
| E_FC | 3 | Floe size of column c | ||
| E_FD | Floe size of column d | |||
| E_FE | Floe size of column e | |||
| E_CS | Concentration of ice in strips and patches | |||
| R_CT | Ratio code (prior to 1983) | |||
| R_CMY | Ratio code (prior to 1983) | |||
| R_CSY | Ratio code (prior to 1983) | |||
| R_CFY | Ratio code (prior to 1983) | |||
| R_CGW | Ratio code (prior to 1983) | |||
| R_CG | Ratio code (prior to 1983) | |||
| R_CN | Ratio code (prior to 1983) | |||
| R_PMY | Ratio code (prior to 1983) | |||
| R_PSY | Ratio code (prior to 1983) | |||
| R_PFY | Ratio code (prior to 1983) | |||
| R_PGW | Ratio code (prior to 1983) | |||
| R_PG | Ratio code (prior to 1983) | |||
| R_PN | Ratio code (prior to 1983) | |||
| R_CS | Ratio code (prior to 1983) | |||
| R_SMY | Ratio code (prior to 1983) | |||
| R_SSY | Ratio code (prior to 1983) | |||
| R_SFY | Ratio code (prior to 1983) | |||
| R_SGW | Ratio code (prior to 1983) | |||
| R_SG | Ratio code (prior to 1983) | |||
| R_SN | Ratio code (prior to 1983) | |||
| N_CT | 10.0 | 10.0 | 0.0 | Numeric value for total concentration |
| N_COI | 0.0 | 0.0 | 0.0 | Numeric value for concentration of old ice |
| N_CMY | 0.0 | 0.0 | 0.0 | Numeric value for concentration of multi year ice |
| N_CSY | 0.0 | 0.0 | 0.0 | Numeric value for concentration of second year ice |
| N_CFY | 10.0 | 7.0 | 0.0 | Numeric value for concentration of first year ice |
| N_CFY_TK | 0.0 | 0.0 | 0.0 | Numeric value for concentration of first year thick ice |
| N_CFY_M | 0.0 | 3.0 | 0.0 | Numeric value for concentration of first year medium ice |
| N_CFY_TN | 0.0 | 4.0 | 0.0 | Numeric value for concentration of first year thin ice |
| N_CYI | 0.0 | 3.0 | 0.0 | Numeric value for concentration of young ice |
| N_CGW | 0.0 | 3.0 | 0.0 | Numeric value for concentration of grey white ice |
| N_CG | 0.0 | 0.0 | 0.0 | Numeric value for concentration of grey ice |
| N_CN | 0.0 | 0.0 | 0.0 | Numeric value for concentration of new ice |
| N_CB | 0.0 | 0.0 | 0.0 | Numeric value for concentration of icebergs |
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