Error: cannot alloc point_buffer

[Asanga Ramanayake]

Hi Martin,

I tried to execute following command to generate a ground classified LiDAR. Data were downloaded from NOAA Digital Coast (for lake Erie) site.

C:\LAStools\bin>lasground.exe -i C:\mydata\converted_utm_laz\OH_Erie_01_utm.laz -olaz -odix _g

I was successful for smaller laz files.

But I got the following error when trying process a bigger laz file.

ERROR: cannot alloc point_buffer for 117276522 points.

       contact martin....@rapidlasso.com for help on what to do.

Could you please help me to figure out what's wrong here and what should I do?

Here is the lasinfo output of the same file. (size of the file 582 MB)

C:\LAStools\bin>lasinfo -i C:\mydata\converted_utm_laz\OH_Erie_01_utm.laz

lasinfo report for C:\mydata\converted_utm_laz\OH_Erie_01_utm.laz

reporting all LAS header entries:

  file signature:             'LASF'

  file source ID:             0

  global_encoding:            0

  project ID GUID data 1-4:   F20BC5E2-9F06-4879-668C-50FA076672BA

  version major.minor:        1.2

  system identifier:          'LAStools (c) by rapidlasso GmbH'

  generating software:        'las2las (version 160124)'

  file creation day/year:     120/2014

  header size:                227

  offset to point data:       467

  number var. length records: 3

  point data format:          1

  point data record length:   28

  number of point records:    117276522

  number of points by return: 16753779 16754025 16753830 16753992 50260896

  scale factor x y z:         0.01 0.01 0.01

  offset x y z:               200000 4600000 0

  min x y z:                  293019.27 4615824.27 166.08

  max x y z:                  305649.06 4622423.23 358.04

variable length header record 1 of 3:

  reserved             43707

  user ID              'NIIRS10'

  record ID            4

  length after header  10

  description          'NIIRS10 Timestamp'

variable length header record 2 of 3:

  reserved             43707

  user ID              'NIIRS10'

  record ID            1

  length after header  26

  description          'NIIRS10 Tile Index'

variable length header record 3 of 3:

  reserved             43707

  user ID              'LASF_Projection'

  record ID            34735

  length after header  40

  description          'by LAStools of rapidlasso GmbH'

    GeoKeyDirectoryTag version 1.1.0 number of keys 4

      key 1024 tiff_tag_location 0 count 1 value_offset 1 - GTModelTypeGeoKey: ModelTypeProjected

      key 3072 tiff_tag_location 0 count 1 value_offset 32617 - ProjectedCSTypeGeoKey: WGS 84 / UTM 17N

      key 3076 tiff_tag_location 0 count 1 value_offset 9001 - ProjLinearUnitsGeoKey: Linear_Meter

      key 4099 tiff_tag_location 0 count 1 value_offset 9001 - VerticalUnitsGeoKey: Linear_Meter

the header is followed by 2 user-defined bytes

LASzip compression (version 2.4r1 c2 50000): POINT10 2 GPSTIME11 2

reporting minimum and maximum for all LAS point record entries ...

  X             9301927   10564906

  Y             1582427    2242323

  Z               16608      35804

  intensity           0       9900

  return_number       1          5

  number_of_returns   0          7

  edge_of_flight_line 0          0

  scan_direction_flag 1          1

  classification      1         11

  scan_angle_rank     0          0

  user_data           1        228

  point_source_ID     0          0

  gps_time -3832672.207513 31775553.327280

WARNING: range violates GPS week time specified by global encoding bit 0

number of first returns:        16753779

number of intermediate returns: 100522731

number of last returns:         14

number of single returns:       10

overview over number of returns of given pulse: 0 2 6 3 12 15 117276474

WARNING: there are 10 points with a number of returns of given pulse of 0

histogram of classification of points:

        88277361  unclassified (1)

        28983562  ground (2)

           15599  road surface (11)

Regards,
 
Asanga Ramanayake
Graduate Student,
School of Earth, Environment and Society (SEES)
181 Overman Hall
Bowling Green State University
Bowling Green, OH 43403
(+1 419-819-1283)

[Martin Isenburg]

Hello Asanga,

this is a very very common question on this list and this time - as an exercise - I suggest to use the search functionality available in this LAStools user forum with the key workds "lasground" and "error" to find about 97 different discussion threads on this topic. I think you will find an answer to your question quickly ... (-:

http://groups.google.com/forum/#!searchin/lastools/lasground$20error

Regards,

Martin @rapidlasso

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