GeoTiles

Map - Town index - Tile index

Relevant towns and neighbourhoods

Made (woonkern)Terheijden (woonkern)Wagenberg (woonkern)Hooge Zwaluwe (woonkern)Eind van Den Hout (buurtschap)Helkant (woonkern)Stuivezand (deelkern)Hespelaar (buurtschap)Den Hout (woonkern)Oud-Drimmelen (gehucht)

Tile 44DN1

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 44dn1.laz 26.5 MiB 44dn1.lax 33 kiB 44dn1.txt 10 kiB Stuurgroep AHN, public domain
Non-ground 44dn1.laz 2.8 MiB 44dn1.lax 73 kiB 44dn1.txt 11 kiB Stuurgroep AHN, public domain
Merged 44DN1.LAZ 29.3 MiB 44DN1.LAX 42 kiB 44DN1.txt 13 kiB Stuurgroep AHN (merged product by GeoTiles)
Colored Available for sub-units only, zoom in to select. Remixed by GeoTiles*
AHN2 Ground g44dn1.laz 478.8 MiB g44dn1.lax 284 kiB g44dn1.txt 5 kiB Stuurgroep AHN, public domain
Non-ground u44dn1.laz 236.0 MiB u44dn1.lax 145 kiB u44dn1.txt 16 kiB Stuurgroep AHN, public domain
Merged 44DN1.LAZ 714.8 MiB 44DN1.LAX 1.2 MiB 44DN1.txt 16 kiB Stuurgroep AHN (merged product by GeoTiles)
Colored Available for sub-units only, zoom in to select. Remixed by GeoTiles*
AHN3 Original C_44DN1.LAZ 1.4 GiB C_44DN1.LAX 1.5 MiB C_44DN1.txt 18 kiB Stuurgroep AHN, public domain
Colored Available for sub-units only, zoom in to select. Remixed by GeoTiles*
AHN4 Original C_44DN1.LAZ 4.1 GiB C_44DN1.LAX 2.0 MiB C_44DN1.txt 18 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_44DN1.LAZ 3.5 GiB 2024_C_44DN1.LAX 2.0 MiB 2024_C_44DN1.txt 20 kiB Het Waterschapshuis, CC-BY
Colored (Partially) available for sub-units. Remixed by GeoTiles*

*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.

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 44dn1.tif.zip public domain
AHN2 r44dn1.tif.zip ahn2_5_44dn1.tif.zip i44dn1.tif.zip public domain *
AHN3 R5_44DN1.zip R_44DN1.zip M5_44DN1.zip M_44DN1.zip CC-0
AHN4 R5_44DN1.zip R_44DN1.zip M5_44DN1.zip M_44DN1.zip CC-0 [1, 2, 3, 4]
AHN5 (2023) CC-BY
AHN5 (2024) 2024_R5_44DN1.TIF 2024_R_44DN1.TIF 2024_M5_44DN1.TIF 2024_M_44DN1.TIF CC-BY

Aerial photograph

Year Version GeoTiff Source License
2016 RGB RGB_44DN1.tiff 53.8 MiB Beeldmateriaal CC-BY 4.0
CIR CIR_44DN1.tiff 52.0 MiB CC-BY 4.0
2017 RGB RGB_44DN1.tiff 49.1 MiB Beeldmateriaal CC-BY 4.0
CIR CIR_44DN1.tiff 48.8 MiB CC-BY 4.0
2018 RGB RGB_44DN1.tiff 66.0 MiB Beeldmateriaal CC-BY 4.0
CIR CIR_44DN1.tiff 65.2 MiB CC-BY 4.0
2019 RGB RGB_44DN1.tiff 61.4 MiB Beeldmateriaal CC-BY 4.0
CIR CIR_44DN1.tiff 51.6 MiB CC-BY 4.0
2020 RGB RGB_44DN1.tiff 56.6 MiB Beeldmateriaal CC-BY 4.0
CIR CIR_44DN1.tiff 53.0 MiB CC-BY 4.0
2022 RGB RGB_44DN1.tiff 68.9 MiB Beeldmateriaal CC-BY 4.0
CIR CIR_44DN1.tiff 70.1 MiB CC-BY 4.0
2023 RGB RGB_44DN1.tiff 69.8 MiB Beeldmateriaal CC-BY 4.0
CIR CIR_44DN1.tiff 71.1 MiB CC-BY 4.0

Sub-tiles 44DN1

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
44DN1_01 AHN1 44DN1_01.LAZ 2.5 MiB 44DN1_01.LAX 5 kiB 44DN1_01.txt 11 kiB Hooge Zwaluwe AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 44DN1_01.LAZ 60.2 MiB 44DN1_01.LAX 50 kiB 44DN1_01.txt 17 kiB
AHN3 44DN1_01.LAZ 81.1 MiB 44DN1_01.LAX 73 kiB 44DN1_01.txt 18 kiB
AHN4 44DN1_01.LAZ 198.5 MiB 44DN1_01.LAX 99 kiB 44DN1_01.txt 19 kiB
AHN5
44DN1_02 AHN1 44DN1_02.LAZ 2.3 MiB 44DN1_02.LAX 5 kiB 44DN1_02.txt 9 kiB Hooge Zwaluwe AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 44DN1_02.LAZ 51.1 MiB 44DN1_02.LAX 46 kiB 44DN1_02.txt 17 kiB
AHN3 44DN1_02.LAZ 82.7 MiB 44DN1_02.LAX 79 kiB 44DN1_02.txt 18 kiB
AHN4 44DN1_02.LAZ 184.1 MiB 44DN1_02.LAX 100 kiB 44DN1_02.txt 19 kiB
AHN5
44DN1_03 AHN1 44DN1_03.LAZ 2.3 MiB 44DN1_03.LAX 5 kiB 44DN1_03.txt 9 kiB Oud-Drimmelen AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 44DN1_03.LAZ 55.0 MiB 44DN1_03.LAX 47 kiB 44DN1_03.txt 17 kiB
AHN3 44DN1_03.LAZ 92.8 MiB 44DN1_03.LAX 81 kiB 44DN1_03.txt 18 kiB
AHN4 44DN1_03.LAZ 192.6 MiB 44DN1_03.LAX 99 kiB 44DN1_03.txt 19 kiB
AHN5
44DN1_04 AHN1 44DN1_04.LAZ 2.3 MiB 44DN1_04.LAX 5 kiB 44DN1_04.txt 9 kiB AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 44DN1_04.LAZ 53.0 MiB 44DN1_04.LAX 46 kiB 44DN1_04.txt 17 kiB
AHN3 44DN1_04.LAZ 91.1 MiB 44DN1_04.LAX 79 kiB 44DN1_04.txt 18 kiB
AHN4 44DN1_04.LAZ 194.3 MiB 44DN1_04.LAX 99 kiB 44DN1_04.txt 19 kiB
AHN5
44DN1_05 AHN1 44DN1_05.LAZ 2.4 MiB 44DN1_05.LAX 5 kiB 44DN1_05.txt 9 kiB Made AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 44DN1_05.LAZ 58.5 MiB 44DN1_05.LAX 49 kiB 44DN1_05.txt 17 kiB
AHN3 44DN1_05.LAZ 86.8 MiB 44DN1_05.LAX 77 kiB 44DN1_05.txt 18 kiB
AHN4 44DN1_05.LAZ 210.3 MiB 44DN1_05.LAX 99 kiB 44DN1_05.txt 19 kiB
AHN5
44DN1_06 AHN1 44DN1_06.LAZ 2.4 MiB 44DN1_06.LAX 5 kiB 44DN1_06.txt 10 kiB Hooge Zwaluwe AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 44DN1_06.LAZ 82.1 MiB 44DN1_06.LAX 65 kiB 44DN1_06.txt 14 kiB
AHN3 44DN1_06.LAZ 79.8 MiB 44DN1_06.LAX 73 kiB 44DN1_06.txt 15 kiB
AHN4 44DN1_06.LAZ 231.5 MiB 44DN1_06.LAX 99 kiB 44DN1_06.txt 18 kiB
AHN5
44DN1_07 AHN1 44DN1_07.LAZ 2.3 MiB 44DN1_07.LAX 5 kiB 44DN1_07.txt 9 kiB Hooge Zwaluwe, Helkant AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 44DN1_07.LAZ 54.2 MiB 44DN1_07.LAX 46 kiB 44DN1_07.txt 14 kiB
AHN3 44DN1_07.LAZ 69.5 MiB 44DN1_07.LAX 67 kiB 44DN1_07.txt 13 kiB
AHN4 44DN1_07.LAZ 198.6 MiB 44DN1_07.LAX 100 kiB 44DN1_07.txt 14 kiB
AHN5
44DN1_08 AHN1 44DN1_08.LAZ 2.4 MiB 44DN1_08.LAX 5 kiB 44DN1_08.txt 9 kiB Made AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 44DN1_08.LAZ 55.8 MiB 44DN1_08.LAX 49 kiB 44DN1_08.txt 13 kiB
AHN3 44DN1_08.LAZ 75.5 MiB 44DN1_08.LAX 69 kiB 44DN1_08.txt 13 kiB
AHN4 44DN1_08.LAZ 219.1 MiB 44DN1_08.LAX 100 kiB 44DN1_08.txt 15 kiB
AHN5
44DN1_09 AHN1 44DN1_09.LAZ 2.8 MiB 44DN1_09.LAX 5 kiB 44DN1_09.txt 11 kiB Made AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 44DN1_09.LAZ 74.6 MiB 44DN1_09.LAX 54 kiB 44DN1_09.txt 13 kiB
AHN3 44DN1_09.LAZ 92.4 MiB 44DN1_09.LAX 75 kiB 44DN1_09.txt 13 kiB
AHN4 44DN1_09.LAZ 256.7 MiB 44DN1_09.LAX 100 kiB 44DN1_09.txt 15 kiB
AHN5
44DN1_10 AHN1 44DN1_10.LAZ 2.8 MiB 44DN1_10.LAX 5 kiB 44DN1_10.txt 11 kiB Made AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 44DN1_10.LAZ 73.7 MiB 44DN1_10.LAX 55 kiB 44DN1_10.txt 13 kiB
AHN3 44DN1_10.LAZ 107.7 MiB 44DN1_10.LAX 82 kiB 44DN1_10.txt 14 kiB
AHN4 44DN1_10.LAZ 256.0 MiB 44DN1_10.LAX 100 kiB 44DN1_10.txt 15 kiB
AHN5
44DN1_11 AHN1 44DN1_11.LAZ 2.4 MiB 44DN1_11.LAX 5 kiB 44DN1_11.txt 9 kiB Wagenberg, Helkant AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 44DN1_11.LAZ 59.1 MiB 44DN1_11.LAX 49 kiB 44DN1_11.txt 12 kiB
AHN3 44DN1_11.LAZ 82.1 MiB 44DN1_11.LAX 72 kiB 44DN1_11.txt 13 kiB
AHN4 44DN1_11.LAZ 222.4 MiB 44DN1_11.LAX 100 kiB 44DN1_11.txt 14 kiB
AHN5
44DN1_12 AHN1 44DN1_12.LAZ 2.4 MiB 44DN1_12.LAX 5 kiB 44DN1_12.txt 10 kiB Helkant, Wagenberg AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 44DN1_12.LAZ 64.1 MiB 44DN1_12.LAX 53 kiB 44DN1_12.txt 16 kiB
AHN3 44DN1_12.LAZ 81.1 MiB 44DN1_12.LAX 71 kiB 44DN1_12.txt 14 kiB
AHN4 44DN1_12.LAZ 231.4 MiB 44DN1_12.LAX 100 kiB 44DN1_12.txt 15 kiB
AHN5
44DN1_13 AHN1 44DN1_13.LAZ 2.7 MiB 44DN1_13.LAX 5 kiB 44DN1_13.txt 11 kiB Made, Stuivezand, Helkant AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 44DN1_13.LAZ 71.8 MiB 44DN1_13.LAX 55 kiB 44DN1_13.txt 16 kiB
AHN3 44DN1_13.LAZ 82.2 MiB 44DN1_13.LAX 71 kiB 44DN1_13.txt 16 kiB
AHN4 44DN1_13.LAZ 236.9 MiB 44DN1_13.LAX 100 kiB 44DN1_13.txt 18 kiB
AHN5
44DN1_14 AHN1 44DN1_14.LAZ 3.9 MiB 44DN1_14.LAX 5 kiB 44DN1_14.txt 10 kiB Made, Stuivezand AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 44DN1_14.LAZ 97.8 MiB 44DN1_14.LAX 58 kiB 44DN1_14.txt 13 kiB
AHN3 44DN1_14.LAZ 113.1 MiB 44DN1_14.LAX 80 kiB 44DN1_14.txt 14 kiB
AHN4 44DN1_14.LAZ 301.4 MiB 44DN1_14.LAX 100 kiB 44DN1_14.txt 15 kiB
AHN5
44DN1_15 AHN1 44DN1_15.LAZ 2.9 MiB 44DN1_15.LAX 5 kiB 44DN1_15.txt 9 kiB Made, Hespelaar AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 44DN1_15.LAZ 89.4 MiB 44DN1_15.LAX 59 kiB 44DN1_15.txt 12 kiB
AHN3 44DN1_15.LAZ 100.5 MiB 44DN1_15.LAX 77 kiB 44DN1_15.txt 16 kiB
AHN4 44DN1_15.LAZ 280.9 MiB 44DN1_15.LAX 100 kiB 44DN1_15.txt 16 kiB
AHN5
44DN1_16 AHN1 44DN1_16.LAZ 2.6 MiB 44DN1_16.LAX 5 kiB 44DN1_16.txt 11 kiB Wagenberg AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 44DN1_16.LAZ 75.1 MiB 44DN1_16.LAX 56 kiB 44DN1_16.txt 16 kiB
AHN3 44DN1_16.LAZ 83.5 MiB 44DN1_16.LAX 70 kiB 44DN1_16.txt 18 kiB
AHN4 44DN1_16.LAZ 227.7 MiB 44DN1_16.LAX 96 kiB 44DN1_16.txt 18 kiB
AHN5
44DN1_17 AHN1 44DN1_17.LAZ 2.4 MiB 44DN1_17.LAX 5 kiB 44DN1_17.txt 9 kiB Wagenberg AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 44DN1_17.LAZ 70.5 MiB 44DN1_17.LAX 58 kiB 44DN1_17.txt 13 kiB
AHN3 44DN1_17.LAZ 77.8 MiB 44DN1_17.LAX 68 kiB 44DN1_17.txt 12 kiB
AHN4 44DN1_17.LAZ 217.1 MiB 44DN1_17.LAX 98 kiB 44DN1_17.txt 14 kiB
AHN5
44DN1_18 AHN1 44DN1_18.LAZ 2.3 MiB 44DN1_18.LAX 5 kiB 44DN1_18.txt 9 kiB Made, Wagenberg AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 44DN1_18.LAZ 94.6 MiB 44DN1_18.LAX 74 kiB 44DN1_18.txt 11 kiB
AHN3 44DN1_18.LAZ 66.7 MiB 44DN1_18.LAX 64 kiB 44DN1_18.txt 13 kiB
AHN4 44DN1_18.LAZ 199.6 MiB 44DN1_18.LAX 99 kiB 44DN1_18.txt 14 kiB
AHN5
44DN1_19 AHN1 44DN1_19.LAZ 2.3 MiB 44DN1_19.LAX 5 kiB 44DN1_19.txt 9 kiB Eind van Den Hout, Made AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 44DN1_19.LAZ 92.6 MiB 44DN1_19.LAX 68 kiB 44DN1_19.txt 14 kiB
AHN3 44DN1_19.LAZ 92.9 MiB 44DN1_19.LAX 79 kiB 44DN1_19.txt 14 kiB
AHN4 44DN1_19.LAZ 261.8 MiB 44DN1_19.LAX 100 kiB 44DN1_19.txt 16 kiB
AHN5
44DN1_20 AHN1 44DN1_20.LAZ 2.1 MiB 44DN1_20.LAX 5 kiB 44DN1_20.txt 9 kiB Hespelaar, Den Hout, Eind van Den Hout AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 44DN1_20.LAZ 69.4 MiB 44DN1_20.LAX 58 kiB 44DN1_20.txt 16 kiB
AHN3 44DN1_20.LAZ 71.1 MiB 44DN1_20.LAX 69 kiB 44DN1_20.txt 17 kiB
AHN4 44DN1_20.LAZ 210.5 MiB 44DN1_20.LAX 100 kiB 44DN1_20.txt 18 kiB
AHN5
44DN1_21 AHN1 44DN1_21.LAZ 2.5 MiB 44DN1_21.LAX 5 kiB 44DN1_21.txt 10 kiB Terheijden AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 44DN1_21.LAZ 76.0 MiB 44DN1_21.LAX 60 kiB 44DN1_21.txt 13 kiB
AHN3 44DN1_21.LAZ 78.3 MiB 44DN1_21.LAX 66 kiB 44DN1_21.txt 14 kiB
AHN4 44DN1_21.LAZ 226.2 MiB 44DN1_21.LAX 98 kiB 44DN1_21.txt 15 kiB
AHN5
44DN1_22 AHN1 44DN1_22.LAZ 2.7 MiB 44DN1_22.LAX 5 kiB 44DN1_22.txt 10 kiB Terheijden AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 44DN1_22.LAZ 79.0 MiB 44DN1_22.LAX 59 kiB 44DN1_22.txt 13 kiB
AHN3 44DN1_22.LAZ 88.7 MiB 44DN1_22.LAX 72 kiB 44DN1_22.txt 15 kiB
AHN4 44DN1_22.LAZ 247.5 MiB 44DN1_22.LAX 98 kiB 44DN1_22.txt 16 kiB
AHN5
44DN1_23 AHN1 44DN1_23.LAZ 2.2 MiB 44DN1_23.LAX 5 kiB 44DN1_23.txt 9 kiB AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 44DN1_23.LAZ 54.1 MiB 44DN1_23.LAX 45 kiB 44DN1_23.txt 11 kiB
AHN3 44DN1_23.LAZ 66.9 MiB 44DN1_23.LAX 64 kiB 44DN1_23.txt 12 kiB
AHN4 44DN1_23.LAZ 195.1 MiB 44DN1_23.LAX 98 kiB 44DN1_23.txt 13 kiB
AHN5
44DN1_24 AHN1 44DN1_24.LAZ 2.2 MiB 44DN1_24.LAX 5 kiB 44DN1_24.txt 8 kiB Eind van Den Hout AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 44DN1_24.LAZ 55.3 MiB 44DN1_24.LAX 47 kiB 44DN1_24.txt 11 kiB
AHN3 44DN1_24.LAZ 66.3 MiB 44DN1_24.LAX 67 kiB 44DN1_24.txt 12 kiB
AHN4 44DN1_24.LAZ 197.0 MiB 44DN1_24.LAX 100 kiB 44DN1_24.txt 13 kiB
AHN5
44DN1_25 AHN1 44DN1_25.LAZ 2.3 MiB 44DN1_25.LAX 5 kiB 44DN1_25.txt 9 kiB Eind van Den Hout, Den Hout AHN (stuurgroep AHN, public data) and aerial photograph (Beeldmateriaal, CC-BY) remixed by GeoTiles, CC-BY
AHN2 44DN1_25.LAZ 68.6 MiB 44DN1_25.LAX 53 kiB 44DN1_25.txt 16 kiB
AHN3 44DN1_25.LAZ 88.2 MiB 44DN1_25.LAX 75 kiB 44DN1_25.txt 17 kiB
AHN4 44DN1_25.LAZ 239.7 MiB 44DN1_25.LAX 100 kiB 44DN1_25.txt 18 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.