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Cell Type
A cell type denotes several possible cell representations in a Map or Categorical Map.
| Cell Type | Domain | Cell Size | Signed | Minimum Value | Maximum Value | Default Null |
|---|---|---|---|---|---|---|
| 1 Bit Integer | Integer 1) | 1 bit | No | 0 | 1 | 0 |
| Signed 8 Bit Integer | 1 byte | Yes 2) | -128 | 127 | -128 | |
| Unsigned 8 Bit Integer | 1 byte | No 3) | 0 | 255 | 0 | |
| Signed 16 Bit Integer | 2 bytes | Yes 4) | -32768 | 32767 | -32768 | |
| Unsigned 16 Bit Integer | 2 bytes | No 5) | 0 | 65535 | 0 | |
| Signed 32 Bit Integer | 4 bytes | Yes 6) | -2147483648 | 2147483647 | -2147483648 | |
| Unsigned 32 Bit Integer | 4 bytes | Yes 7) | 0 | 4294967295 | 0 | |
| IEEE 754 32 Bit Real8) | Real 9) | 4 bytes | Yes 10) | -3.4028235*1038 | 3.4028235*1038 | -9999 |
A cell type value can also be created from integral values, like Integer, Positive Integer, Non Negative Integer etc, and from real values, like Double. The mapping of numeric values and their corresponding cell type values can be seen below:
| Numeric Value | Cell Type |
|---|---|
| 0 | 1 Bit Integer |
| 1 | Signed 8 Bit Integer |
| 2 | Unsigned 8 Bit Integer |
| 3 | Signed 16 Bit Integer |
| 4 | Unsigned 16 Bit Integer |
| 5 | Signed 32 Bit Integer |
| 6 | Unsigned 32 Bit Integer |
| 7 | IEEE 754 32 Bit Real |
It is worth noting that the definition of maps with cell type “1 Bit Integer” helps saving memory, but it also has a huge negative impact in performance.
GUI Editor
Graphical representation of the cell type editor
EGO Script
A cell type constant can be represented in a EGO Script using the following syntax:
| Cell Type | Representation |
|---|---|
| 1 Bit Integer | .uint1 |
| Signed 8 Bit Integer | .int8 |
| Unsigned 8 Bit Integer | .uint8 |
| Signed 16 Bit Integer | .int16 |
| Unsigned 16 Bit Integer | .uint16 |
| Signed 32 Bit Integer | .int32 |
| Unsigned 32 Bit Integer | .uint32 |
| IEEE 754 32 Bit Real | .float32 |