Sorting and Filtering Spatial Data Tables
In addition to spatial selection, you can select / deselect records in the corresponding GIS data table.
This forms permits sort, search and filter operations on the GIS data table in a similar way as under ArcView GIS:
- Sorting (ascending). by clicking the button Sorted by ... , the sort mechanism steps through the available fields.
Each time the sort button is pressed, it will sort the next field. When
reached the last one, it will start on the first field again:
- Searching for text sections (no wild cards allowed) with Find First / Find Next.
The cursor is moving to the first / next record and highlighting it with a dotted border but not automatically selecting it
- Promoting to top the selected records. Toggling the mark on and off will refresh the list.
The "sorted by" option, if selected, is still valid, i.e. the selected
records (highlighted in black and promoted, and the unselected records
(below) are sorted like individual data sets.
Note: This is a feature nor available under ArcView GIS.
- The Filter tool is a bit more complicated, involving a number of different options.
- Select a field in the Fields box by clicking on it. By default, none is selected.
- Select an operator in the Criteria box. By default, "like" is selected.
- Manually type the filter item into the As box. In case of a string, you must include quotation marks. Wildcards are allowed.
- Construct the filter criteria by pressing the "write code" button.
The constructed SQL code will be shown in the Result box.
If you don't like it, press the "delete filter criteria" button.
However, you could else well just construct a new one SQL code and the old one will be automatically overwritten.
- In the Choose operation box, choose the filter option respective to an existing selection. The default is "Create new set".
With "Add to set", "Remove from set" and "Select from set", you can
construct queries of any complexity, also using different fields.
Note: the option "Remove from set" is not even available under ArcView GIS.
- Press the "apply filter" to execute the command.
Any changes of the selections in the table are immediately
reflected in the map form (showing the number of selected records and
highlighting the selected records in yellow ).
Note : The "table" shown in the form is an Access "list
field", in case of large data sets (like the wells) updating may take a
To close the form, either press the "Exit form" button or just click into the map form.