|
000
| 02335nam 2200397zi 4500 |
|---|
| 001 | 9.895005 |
|---|
| 003 | CaOODSP |
|---|
| 005 | 20221107173913 |
|---|
| 006 | m o d f |
|---|
| 007 | cr bn||||||||| |
|---|
| 008 | 210104e198202 oncab obt f000 0 eng d |
|---|
| 040 | |aCaOODSP|beng|erda|cCaOODSP |
|---|
| 043 | |an-cn--- |
|---|
| 086 | 1 |aCo24-3/7-1353-1982E-PDF |
|---|
| 100 | 1 |aWhitteker, J. H. |q(James Howard), |d1940- |eauthor. |
|---|
| 245 | 14|aThe CRC topographic data base / |cby J.H. Whitteker. |
|---|
| 264 | 1|aOttawa : |bCommunications Research Centre, |cFebruary 1982. |
|---|
| 300 | |a1 online resource (vii, 57 pages) : |billustrations, maps. |
|---|
| 336 | |atext|btxt|2rdacontent |
|---|
| 337 | |acomputer|bc|2rdamedia |
|---|
| 338 | |aonline resource|bcr|2rdacarrier |
|---|
| 490 | 1 |aCRC report ; |vno. 1353 |
|---|
| 500 | |a"Radar and Communications Technology Branch." |
|---|
| 500 | |aDigitized edition from print [produced by Innovation, Science and Economic Development Canada]. |
|---|
| 500 | |aSome pages rotated in this copy. |
|---|
| 504 | |aIncludes bibliographical references (page 36). |
|---|
| 520 | 3 |a"A data base of terrain elevations and surface types has been compiled, primarily to provide input data for radio-wave prediction programs. The data have been derived by hand-scaling 1:50000 scale topographic maps. An elevation and a surface code (forest, lake, etc.) is stored for each point in a square array with 500 metre spacing. The data reside on computer disk, and are organized for rapid access. The usual method of obtaining information from the data base is by means of a Fortran subroutine that provides elevations and surface codes at 500 m intervals along any specified great-circle path within the data-base area. The elevations may also be plotted on an ordinary (alphanumeric) computer terminal"--Abstract, page 1. |
|---|
| 530 | |aIssued also in print format. |
|---|
| 650 | 0|aLand cover|zCanada|xDatabases. |
|---|
| 650 | 6|aOccupation du sol|zCanada|xBases de données. |
|---|
| 651 | 0|aCanada|xAltitudes|xDatabases. |
|---|
| 651 | 6|aCanada|xAltitudes|xBases de données. |
|---|
| 710 | 2 |aCommunications Research Centre (Canada), |eissuing body. |
|---|
| 830 | #0|aCRC report ;|vno. 1353.|w(CaOODSP)9.882492 |
|---|
| 856 | 40|qPDF|s1.23 MB|uhttps://publications.gc.ca/collections/collection_2021/isde-ised/co24/Co24-3-7-1353-1982-eng.pdf |
|---|