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 |
| IEEE 754 64 Bit Real11) | Real 12) | 8 bytes | Yes 13) | -2.2250738585072014*10308 | 2.2250738585072014*10308 | -9999 |
A cell type value can also be created from integral values, like Integer Value, Positive Integer Value, Non Negative Integer Value etc, and from real values, like Real Value. 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 |
| 8 | IEEE 754 64 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. On the other hand, the use the cell type “IEEE 754 64 Bit Real” uses way more memory than any other cell type.
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 |
| IEEE 754 64 Bit Real | .float64 |
Automatic Conversions
- Converted from: Real Value Type, Non Negative Integer Value Type, Positive Integer Value Type and Integer Value Type.
- Converted to: Real Value Type, Non Negative Integer Value Type, Positive Integer Value Type and Integer Value Type.
1)
can represent only integer values
8)
A value represented in this format usually have only 7 significant digits
11)
A value represented in this format usually have only 16 significant digits