GeoTiles

Map - Town index - Tile index

Relevant towns and neighbourhoods

Cadzand-Bad (woonkern)Nieuwvliet-Bad (recreatiekern)Cadzand (woonkern)Retranchement (woonkern)Zomerdorp Het Zwin (recreatiekern)

Tile 66FN2

Actueel Hoogtebestand Nederland

Point cloud

The aerial photograph closest to the acquisition date of the AHN iteration was overlaid on the point cloud to produce a colored version for visualisation purposes. Furthermore, for each point cloud a spatial index and textual summary, including elevation histogram, are provided. Please note that the images are not from the same flight, and may be years off. Therefore, small alignment errors and differences occur between them.

Zoom in on the map to see tiled versions (25 tiles of 1×1.25 km). Tiled versions typically fit into memory (RAM) are easier to handle and are especially suitable for parallel processing and Machine Learning.

Version Point cloud Spatial index Info License
AHN1 Ground 66fn2.laz 2.4 MiB 66fn2.lax 13 kiB 66fn2.txt 8 kiB Stuurgroep AHN, public domain
Non-ground 66fn2.laz 125 kiB 66fn2.lax 25 kiB 66fn2.txt 9 kiB Stuurgroep AHN, public domain
Merged 66FN2.LAZ 2.6 MiB 66FN2.LAX 15 kiB 66FN2.txt 10 kiB Stuurgroep AHN (merged product by GeoTiles)
Colored Available for sub-units only, zoom in to select. Remixed by GeoTiles*
AHN2 Ground g66fn2.laz 373.8 MiB g66fn2.lax 210 kiB g66fn2.txt 8 kiB Stuurgroep AHN, public domain
Non-ground u66fn2.laz 83.2 MiB u66fn2.lax 63 kiB u66fn2.txt 12 kiB Stuurgroep AHN, public domain
Merged 66FN2.LAZ 457.1 MiB 66FN2.LAX 821 kiB 66FN2.txt 13 kiB Stuurgroep AHN (merged product by GeoTiles)
Colored Available for sub-units only, zoom in to select. Remixed by GeoTiles*
AHN3 Original C_66FN2.LAZ 1.5 GiB C_66FN2.LAX 1.4 MiB C_66FN2.txt 15 kiB Stuurgroep AHN, public domain
Colored Available for sub-units only, zoom in to select. Remixed by GeoTiles*
AHN4 Original C_66FN2.LAZ 3.8 GiB C_66FN2.LAX 1.5 MiB C_66FN2.txt 17 kiB Het Waterschapshuis, public domain
Colored (Partially) available for sub-units. Remixed by GeoTiles*
AHN5 Original, 2023 Het Waterschapshuis, CC-BY
Original, 2024 2024_C_66FN2.LAZ 2.4 GiB 2024_C_66FN2.LAX 1.5 MiB 2024_C_66FN2.txt 17 kiB Het Waterschapshuis, CC-BY
Colored (Partially) available for sub-units. Remixed by GeoTiles*
Yearly3 2016 c_Kust2016_66FN2.laz 14.4 MiB c_Kust2016_66FN2.txt 11 kiB See source (Rijkswaterstaat)
2017 c_KustZuid2017_66FN2.laz 13.3 MiB c_KustZuid2017_66FN2.txt 13 kiB See source (Rijkswaterstaat)
2018 c_Kust2018_66fn2.laz 25.1 MiB c_Kust2018_66fn2.txt 18 kiB See source (Rijkswaterstaat)
2019 c_Kust2019_66fn2.laz 80.7 MiB c_Kust2019_66fn2.txt 14 kiB See source (Rijkswaterstaat)
2020 C_KUST2020_66FN2.LAZ 28.7 MiB C_KUST2020_66FN2.LAX 11 kiB C_KUST2020_66FN2.txt 15 kiB See source (Rijkswaterstaat)
2021 C_KUST2021_66FN2.LAZ 24.4 MiB C_KUST2021_66FN2.LAX 20 kiB C_KUST2021_66FN2.txt 16 kiB See source (Rijkswaterstaat)
2022 C_KUST2022_66FN2.LAZ 58.0 MiB C_KUST2022_66FN2.LAX 74 kiB C_KUST2022_66FN2.txt 18 kiB See source (Rijkswaterstaat)
2023 C_KUST2023_66FN2.LAZ 16.3 MiB C_KUST2023_66FN2.LAX 11 kiB C_KUST2023_66FN2.txt 16 kiB See source (Rijkswaterstaat)

*The point cloud is in the public domain and the aerial photograph available under CC-BY. However, the colored point cloud is a new product created by GeoTiles.

3Partial coverage only.

File checksums (md5) are available for AHN1, AHN2, AHN3 and AHN4.

Raster

Version DSM DTM ('maaiveld') License
5 meter ½ meter 5 meter ½ meter
AHN1 66fn2.tif.zip public domain
AHN2 r66fn2.tif.zip ahn2_5_66fn2.tif.zip i66fn2.tif.zip public domain *
AHN3 R5_66FN2.zip R_66FN2.zip M5_66FN2.zip M_66FN2.zip CC-0
AHN4 R5_66FN2.zip R_66FN2.zip M5_66FN2.zip M_66FN2.zip CC-0 [1, 2, 3, 4]
AHN5 (2023) CC-BY
AHN5 (2024) 2024_R5_66FN2.TIF 2024_R_66FN2.TIF 2024_M5_66FN2.TIF 2024_M_66FN2.TIF CC-BY

Aerial photograph

Year Version GeoTiff Source License
2016 RGB RGB_66FN2.tiff 48.3 MiB Beeldmateriaal CC-BY 4.0
CIR CIR_66FN2.tiff 46.6 MiB CC-BY 4.0
2017 RGB RGB_66FN2.tiff 51.7 MiB Beeldmateriaal CC-BY 4.0
CIR CIR_66FN2.tiff 49.6 MiB CC-BY 4.0
2018 RGB RGB_66FN2.tiff 53.8 MiB Beeldmateriaal CC-BY 4.0
CIR CIR_66FN2.tiff 53.2 MiB CC-BY 4.0
2019 RGB RGB_66FN2.tiff 50.8 MiB Beeldmateriaal CC-BY 4.0
CIR CIR_66FN2.tiff 49.0 MiB CC-BY 4.0
2020 RGB RGB_66FN2.tiff 44.3 MiB Beeldmateriaal CC-BY 4.0
CIR CIR_66FN2.tiff 41.7 MiB CC-BY 4.0
2022 RGB RGB_66FN2.tiff 71.1 MiB Beeldmateriaal CC-BY 4.0
CIR CIR_66FN2.tiff 66.4 MiB CC-BY 4.0
2023 RGB RGB_66FN2.tiff 52.3 MiB Beeldmateriaal CC-BY 4.0
CIR CIR_66FN2.tiff 50.6 MiB CC-BY 4.0

Sub-tiles 66FN2

Image adapted from Kadaster TOPraster and OpenTopo.

Actueel Hoogtebestand Nederland

Point cloud

These sub-tiles of 1×1.25 km are clipped from the original point cloud. Goal is to enable distributed processing of the point cloud. Therefore, a 25 m overlap to the neighbouring (sub-)tiles is added. Thanks to the overlap between sub-tiles, the sub-tiles can be processed independently and therefore parallel.

All other data sets on this website are only available in the main tiling schema.

Tile Version Point cloud Spatial index Info Residential areas License
66FN2_01 AHN1 AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2
AHN3
AHN4
AHN5
66FN2_02 AHN1 AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2
AHN3
AHN4
AHN5
66FN2_03 AHN1 66FN2_03.LAZ 6 kiB 66FN2_03.LAX 244 B 66FN2_03.txt 5 kiB AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 66FN2_03.LAZ 134 kiB 66FN2_03.LAX 444 B 66FN2_03.txt 5 kiB
AHN3 66FN2_03.LAZ 62 kiB 66FN2_03.LAX 292 B 66FN2_03.txt 4 kiB
AHN4 66FN2_03.LAZ 3.0 MiB 66FN2_03.LAX 640 B 66FN2_03.txt 6 kiB
AHN5
66FN2_04 AHN1 66FN2_04.LAZ 60 kiB 66FN2_04.LAX 1 kiB 66FN2_04.txt 5 kiB AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 66FN2_04.LAZ 1.3 MiB 66FN2_04.LAX 3 kiB 66FN2_04.txt 5 kiB
AHN3 66FN2_04.LAZ 5.7 MiB 66FN2_04.LAX 2 kiB 66FN2_04.txt 5 kiB
AHN4 66FN2_04.LAZ 26.1 MiB 66FN2_04.LAX 4 kiB 66FN2_04.txt 6 kiB
AHN5
66FN2_05 AHN1 66FN2_05.LAZ 58 kiB 66FN2_05.LAX 2 kiB 66FN2_05.txt 5 kiB AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 66FN2_05.LAZ 1.4 MiB 66FN2_05.LAX 3 kiB 66FN2_05.txt 5 kiB
AHN3 66FN2_05.LAZ 8.2 MiB 66FN2_05.LAX 3 kiB 66FN2_05.txt 5 kiB
AHN4 66FN2_05.LAZ 30.1 MiB 66FN2_05.LAX 4 kiB 66FN2_05.txt 6 kiB
AHN5
66FN2_06 AHN1 66FN2_06.LAZ 71 kiB 66FN2_06.LAX 2 kiB 66FN2_06.txt 5 kiB AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 66FN2_06.LAZ 2.4 MiB 66FN2_06.LAX 4 kiB 66FN2_06.txt 6 kiB
AHN3 66FN2_06.LAZ 13.2 MiB 66FN2_06.LAX 6 kiB 66FN2_06.txt 6 kiB
AHN4 66FN2_06.LAZ 23.5 MiB 66FN2_06.LAX 3 kiB 66FN2_06.txt 8 kiB
AHN5
66FN2_07 AHN1 66FN2_07.LAZ 112 kiB 66FN2_07.LAX 2 kiB 66FN2_07.txt 10 kiB Cadzand-Bad AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 66FN2_07.LAZ 18.6 MiB 66FN2_07.LAX 17 kiB 66FN2_07.txt 12 kiB
AHN3 66FN2_07.LAZ 59.9 MiB 66FN2_07.LAX 40 kiB 66FN2_07.txt 13 kiB
AHN4 66FN2_07.LAZ 39.6 MiB 66FN2_07.LAX 28 kiB 66FN2_07.txt 15 kiB
AHN5
66FN2_08 AHN1 66FN2_08.LAZ 437 kiB 66FN2_08.LAX 3 kiB 66FN2_08.txt 9 kiB Cadzand-Bad AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 66FN2_08.LAZ 48.1 MiB 66FN2_08.LAX 37 kiB 66FN2_08.txt 10 kiB
AHN3 66FN2_08.LAZ 137.6 MiB 66FN2_08.LAX 75 kiB 66FN2_08.txt 12 kiB
AHN4 66FN2_08.LAZ 288.1 MiB 66FN2_08.LAX 75 kiB 66FN2_08.txt 12 kiB
AHN5
66FN2_09 AHN1 66FN2_09.LAZ 470 kiB 66FN2_09.LAX 4 kiB 66FN2_09.txt 9 kiB Cadzand-Bad AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 66FN2_09.LAZ 49.3 MiB 66FN2_09.LAX 44 kiB 66FN2_09.txt 10 kiB
AHN3 66FN2_09.LAZ 148.7 MiB 66FN2_09.LAX 92 kiB 66FN2_09.txt 12 kiB
AHN4 66FN2_09.LAZ 283.0 MiB 66FN2_09.LAX 99 kiB 66FN2_09.txt 14 kiB
AHN5
66FN2_10 AHN1 66FN2_10.LAZ 522 kiB 66FN2_10.LAX 4 kiB 66FN2_10.txt 9 kiB Nieuwvliet-Bad AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 66FN2_10.LAZ 62.9 MiB 66FN2_10.LAX 51 kiB 66FN2_10.txt 11 kiB
AHN3 66FN2_10.LAZ 156.8 MiB 66FN2_10.LAX 93 kiB 66FN2_10.txt 12 kiB
AHN4 66FN2_10.LAZ 217.7 MiB 66FN2_10.LAX 93 kiB 66FN2_10.txt 14 kiB
AHN5
66FN2_11 AHN1 66FN2_11.LAZ 592 kiB 66FN2_11.LAX 3 kiB 66FN2_11.txt 11 kiB Cadzand-Bad, Zomerdorp Het Zwin AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 66FN2_11.LAZ 70.3 MiB 66FN2_11.LAX 53 kiB 66FN2_11.txt 14 kiB
AHN3 66FN2_11.LAZ 193.1 MiB 66FN2_11.LAX 91 kiB 66FN2_11.txt 17 kiB
AHN4 66FN2_11.LAZ 258.2 MiB 66FN2_11.LAX 96 kiB 66FN2_11.txt 20 kiB
AHN5
66FN2_12 AHN1 66FN2_12.LAZ 535 kiB 66FN2_12.LAX 4 kiB 66FN2_12.txt 9 kiB Cadzand-Bad, Cadzand AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 66FN2_12.LAZ 68.7 MiB 66FN2_12.LAX 53 kiB 66FN2_12.txt 11 kiB
AHN3 66FN2_12.LAZ 163.8 MiB 66FN2_12.LAX 97 kiB 66FN2_12.txt 12 kiB
AHN4 66FN2_12.LAZ 236.5 MiB 66FN2_12.LAX 100 kiB 66FN2_12.txt 14 kiB
AHN5
66FN2_13 AHN1 66FN2_13.LAZ 486 kiB 66FN2_13.LAX 4 kiB 66FN2_13.txt 8 kiB Cadzand, Cadzand-Bad AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 66FN2_13.LAZ 61.5 MiB 66FN2_13.LAX 54 kiB 66FN2_13.txt 11 kiB
AHN3 66FN2_13.LAZ 123.9 MiB 66FN2_13.LAX 94 kiB 66FN2_13.txt 13 kiB
AHN4 66FN2_13.LAZ 332.6 MiB 66FN2_13.LAX 100 kiB 66FN2_13.txt 14 kiB
AHN5
66FN2_14 AHN1 66FN2_14.LAZ 441 kiB 66FN2_14.LAX 3 kiB 66FN2_14.txt 7 kiB AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 66FN2_14.LAZ 64.6 MiB 66FN2_14.LAX 53 kiB 66FN2_14.txt 12 kiB
AHN3 66FN2_14.LAZ 98.0 MiB 66FN2_14.LAX 92 kiB 66FN2_14.txt 13 kiB
AHN4 66FN2_14.LAZ 328.6 MiB 66FN2_14.LAX 100 kiB 66FN2_14.txt 14 kiB
AHN5
66FN2_15 AHN1 66FN2_15.LAZ 486 kiB 66FN2_15.LAX 4 kiB 66FN2_15.txt 7 kiB Nieuwvliet-Bad AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 66FN2_15.LAZ 65.0 MiB 66FN2_15.LAX 54 kiB 66FN2_15.txt 14 kiB
AHN3 66FN2_15.LAZ 101.1 MiB 66FN2_15.LAX 89 kiB 66FN2_15.txt 15 kiB
AHN4 66FN2_15.LAZ 216.4 MiB 66FN2_15.LAX 100 kiB 66FN2_15.txt 16 kiB
AHN5
66FN2_16 AHN1 66FN2_16.LAZ 535 kiB 66FN2_16.LAX 3 kiB 66FN2_16.txt 8 kiB Zomerdorp Het Zwin AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 66FN2_16.LAZ 75.3 MiB 66FN2_16.LAX 61 kiB 66FN2_16.txt 11 kiB
AHN3 66FN2_16.LAZ 120.1 MiB 66FN2_16.LAX 87 kiB 66FN2_16.txt 12 kiB
AHN4 66FN2_16.LAZ 219.0 MiB 66FN2_16.LAX 99 kiB 66FN2_16.txt 14 kiB
AHN5
66FN2_17 AHN1 66FN2_17.LAZ 426 kiB 66FN2_17.LAX 3 kiB 66FN2_17.txt 7 kiB Cadzand AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 66FN2_17.LAZ 53.8 MiB 66FN2_17.LAX 47 kiB 66FN2_17.txt 9 kiB
AHN3 66FN2_17.LAZ 80.7 MiB 66FN2_17.LAX 76 kiB 66FN2_17.txt 11 kiB
AHN4 66FN2_17.LAZ 181.1 MiB 66FN2_17.LAX 100 kiB 66FN2_17.txt 12 kiB
AHN5
66FN2_18 AHN1 66FN2_18.LAZ 518 kiB 66FN2_18.LAX 3 kiB 66FN2_18.txt 8 kiB Cadzand AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 66FN2_18.LAZ 81.1 MiB 66FN2_18.LAX 64 kiB 66FN2_18.txt 13 kiB
AHN3 66FN2_18.LAZ 93.5 MiB 66FN2_18.LAX 79 kiB 66FN2_18.txt 13 kiB
AHN4 66FN2_18.LAZ 317.9 MiB 66FN2_18.LAX 100 kiB 66FN2_18.txt 15 kiB
AHN5
66FN2_19 AHN1 66FN2_19.LAZ 473 kiB 66FN2_19.LAX 3 kiB 66FN2_19.txt 7 kiB AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 66FN2_19.LAZ 63.4 MiB 66FN2_19.LAX 53 kiB 66FN2_19.txt 11 kiB
AHN3 66FN2_19.LAZ 87.7 MiB 66FN2_19.LAX 81 kiB 66FN2_19.txt 12 kiB
AHN4 66FN2_19.LAZ 346.9 MiB 66FN2_19.LAX 100 kiB 66FN2_19.txt 14 kiB
AHN5
66FN2_20 AHN1 66FN2_20.LAZ 496 kiB 66FN2_20.LAX 3 kiB 66FN2_20.txt 7 kiB AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 66FN2_20.LAZ 71.2 MiB 66FN2_20.LAX 52 kiB 66FN2_20.txt 14 kiB
AHN3 66FN2_20.LAZ 123.9 MiB 66FN2_20.LAX 81 kiB 66FN2_20.txt 15 kiB
AHN4 66FN2_20.LAZ 277.9 MiB 66FN2_20.LAX 99 kiB 66FN2_20.txt 16 kiB
AHN5
66FN2_21 AHN1 66FN2_21.LAZ 537 kiB 66FN2_21.LAX 3 kiB 66FN2_21.txt 8 kiB Retranchement AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 66FN2_21.LAZ 61.9 MiB 66FN2_21.LAX 53 kiB 66FN2_21.txt 13 kiB
AHN3 66FN2_21.LAZ 112.1 MiB 66FN2_21.LAX 91 kiB 66FN2_21.txt 14 kiB
AHN4 66FN2_21.LAZ 254.4 MiB 66FN2_21.LAX 99 kiB 66FN2_21.txt 15 kiB
AHN5
66FN2_22 AHN1 66FN2_22.LAZ 399 kiB 66FN2_22.LAX 3 kiB 66FN2_22.txt 7 kiB AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 66FN2_22.LAZ 49.5 MiB 66FN2_22.LAX 45 kiB 66FN2_22.txt 11 kiB
AHN3 66FN2_22.LAZ 83.6 MiB 66FN2_22.LAX 85 kiB 66FN2_22.txt 12 kiB
AHN4 66FN2_22.LAZ 199.6 MiB 66FN2_22.LAX 100 kiB 66FN2_22.txt 13 kiB
AHN5
66FN2_23 AHN1 66FN2_23.LAZ 426 kiB 66FN2_23.LAX 3 kiB 66FN2_23.txt 7 kiB AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 66FN2_23.LAZ 53.9 MiB 66FN2_23.LAX 46 kiB 66FN2_23.txt 10 kiB
AHN3 66FN2_23.LAZ 88.5 MiB 66FN2_23.LAX 85 kiB 66FN2_23.txt 11 kiB
AHN4 66FN2_23.LAZ 282.4 MiB 66FN2_23.LAX 100 kiB 66FN2_23.txt 13 kiB
AHN5
66FN2_24 AHN1 66FN2_24.LAZ 444 kiB 66FN2_24.LAX 3 kiB 66FN2_24.txt 7 kiB AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 66FN2_24.LAZ 52.8 MiB 66FN2_24.LAX 48 kiB 66FN2_24.txt 12 kiB
AHN3 66FN2_24.LAZ 90.0 MiB 66FN2_24.LAX 86 kiB 66FN2_24.txt 14 kiB
AHN4 66FN2_24.LAZ 383.5 MiB 66FN2_24.LAX 100 kiB 66FN2_24.txt 15 kiB
AHN5
66FN2_25 AHN1 66FN2_25.LAZ 464 kiB 66FN2_25.LAX 3 kiB 66FN2_25.txt 7 kiB AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 66FN2_25.LAZ 57.5 MiB 66FN2_25.LAX 48 kiB 66FN2_25.txt 12 kiB
AHN3 66FN2_25.LAZ 96.0 MiB 66FN2_25.LAX 90 kiB 66FN2_25.txt 13 kiB
AHN4 66FN2_25.LAZ 237.3 MiB 66FN2_25.LAX 100 kiB 66FN2_25.txt 14 kiB
AHN5

No guarantee on availability, completeness, correctness or fitness for any particular purpose is implied by the distribution of or linking to this data. The license indicated with the products is to the best of my knowledge at the time of writing. Please confirm the applicable license with the source before integrating the data.