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Aggregate (Spatial Analyst) outputs the same values whatever statistic is requested

Question asked by David_Kidd_org on Mar 5, 2019
Latest reply on Mar 11, 2019 by jlaguna-esristaff

I am experiencing a problem using the Aggregate (Spatial Analyst) tool in both ArcGIS Desktop 10.6.1 and ArcPro 2.2.1 to calculate statistics for generalised raster cells.

 

I have a 1km resolution DEM from which I want to calculate the MAXIMUM cell value within the cells of a 5km raster. The origins of both rasters are the same.

 

My simple test data set (in Aggregate.gdb) is a 5x5 1km2 elevation grid (ScotDEMCellAOI) with values as follows:

 

OBJECTID

Value

Count

1

456

1

456

2

459

1

459

3

460

1

460

4

466

1

466

5

488

1

488

6

489

1

489

7

496

1

496

8

499

1

499

9

500

1

500

10

501

1

501

11

507

1

507

12

511

1

511

13

513

2

1026

14

521

1

521

15

522

1

522

16

538

1

538

17

541

1

541

18

544

1

544

19

546

1

546

20

576

1

576

21

580

1

580

22

598

1

598

23

599

1

599

24

600

1

600

Max

600

Mean

520.92

 

ScotDEMCellAOI

 

I wish to aggregate these cells to the coincident 5*5 km cell (CellAOI5km).

 

I populate the Aggregate (Spatial Analyst) as follows:

 

 

 

 

The output is a single 5*5 cell with the value 496?

 

 

 

I get the same output when I try and calculate other statistics?

 

Am I doing something wrong?

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