VectorIQផ្ទាំងអន្តរកម្ម

Default Value Filler

បំពេញតម្លៃទទេក្នុងវាល ដោយប្រើយុទ្ធសាស្ត្រដែលបានជ្រើស — តម្លៃថេរ មធ្យម មធ្យមភាគ តម្លៃមុន ឬតម្លៃនៃលក្ខណៈជិតបំផុត — ជាមួយតារាងពិនិត្យបង្ហាញច្បាស់នូវអ្វីដែលនឹងផ្លាស់ប្តូរ មុនពេលសរសេរ។

រកឃើញនៅឯណា
KGA Toolbox ▸ Data Management ▸ Attribute ▸ Default Value Filler

ទិដ្ឋភាពទូទៅ

Where Add value to fields writes a value you supply, this tool derives the value from the data itself.

ការប្រើប្រាស់

  • The tool opens as a dock pane rather than a modal window, so it can stay open beside the map while you work.
  • Filling Strategy determines where the replacement value comes from:
StrategyReplacement valueSuits
ConstantThe value typed into Constant ValueA known default, such as a status code
MeanThe arithmetic mean of the field's non-null valuesNumeric data without significant outliers
MedianThe middle value of the field's non-null valuesNumeric data with outliers — a single extreme value distorts the mean but not the median
Forward FillThe previous non-null value in feature orderOrdered data where a blank means "same as above"
Nearest FeatureThe value of the geographically nearest feature that has oneSpatially correlated attributes, such as a commune name or a land-use class
  • Mean and Median apply to numeric fields only. Forward Fill depends on feature order, so confirm that order is meaningful before relying on it.
  • The workflow is Analyze → review → Fill → Save. This is the important thing about this tool: 1. Analyze inspects the field and populates the grid, listing each affected row with its OID, Current Value, and the Action to be taken. 2. Review that grid. Nothing has been written yet. 3. Fill Nulls applies the strategy. 4. Save Edits commits the changes to the data. Because the changes are staged as edits, they can be discarded before saving — use ArcGIS Pro's Discard if the result is wrong.
  • Select Nulls selects the features with null values in the map, so they can be inspected geographically before any filling. A cluster of nulls in one area often points to a data-collection gap rather than something to be filled statistically.
  • Treat empty text as null includes empty strings among the values considered null. Without it, a field full of empty strings appears to have no nulls at all.
  • Use selected features only limits the operation to the current selection.
  • Filling a null replaces "unknown" with an estimate. For anything that will be reported or relied on, record which values were derived rather than observed.

ប៉ារ៉ាម៉ែត្រ

Parameters for Default Value Filler
ផ្ទាំងគ្រប់គ្រងការពិពណ៌នា
Input Layer

The layer or table to operate on.

Field Selector

The field whose nulls are filled.

Filling Strategy

The source of the replacement value — Constant, Mean, Median, Forward Fill, or Nearest Feature.

Constant Value

The value to write. Used with the Constant strategy.

Use selected features only

Restricts the operation to the features currently selected in the map.

Treat empty text as null

Counts empty strings as null.

Analyze

Inspects the field and fills the review grid. Writes nothing.

Select Nulls

Selects the features holding null values, for inspection on the map.

Fill Nulls

Applies the chosen strategy as a staged edit.

Save Edits

Commits the staged edits to the data.

OID / Current Value / Action

Review grid columns showing each affected row and what will happen to it.

របៀបប្រើ

  1. On the KGA Toolbox tab, in the Data Management group, open the Attribute menu and click Default Value Filler. The dock pane opens.
  2. Set Input Layer and choose the field in Field Selector.
  3. Check Treat empty text as null if blanks are stored as empty strings.
  4. Click Select Nulls and look at where they fall on the map. If they cluster, consider whether filling is appropriate at all.
  5. Choose a Filling Strategy. Prefer Median over Mean where the data has outliers; choose Nearest Feature for spatially correlated attributes.
  6. Click Analyze and read the grid. Confirm the Action column is what you intend for every row.
  7. Click Fill Nulls.
  8. Check the result, then click Save Edits to commit — or discard the edits if the result is wrong.

ព័ត៌មានអាជ្ញាបណ្ណ

Requires an active KGA Toolbox license. The tool validates the license before running.

មើលផងដែរ

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