h4h5tools

Add fake dimension map (EOS Swath) during conversion

Swath data may not have any dimension maps, this case has not been handled correctly. This case causes an error.

To handle this case without unnecessarily complicated branches, add fake dimension maps. For example, AR_Ocean has Ocean_product_quality_flag datatfield and Latitude, Longitude and Time geofields. Each field defines following dimensions:
  - Ocean_product_quality_flag: DataTrack_lo, DataXTrack_lo, Qual_dim
  - Time:                       DataTrack_lo
  - Longitude:                  DataTrack_lo, DataXTrack_lo
  - Latitude:                   DataTrack_lo, DataXTrack_lo

The following three fake dimension maps are created for Ocean_product_quality_flag
  - DataTrack_lo -> DataTrack_lo (increment: 1, offset: 0)
  - DataXTrack_lo -> DataXTrack_lo (increment: 1, offset: 0)
  - Qual_dim -> Qual_dim (increment: 1, offset: 0)

Although this modification prevents errors, swath conversion is not enough because it does not attach dimensional scale, yet. This will be implemented.