pointcloud georeference issue

[d4nd1978]

Hello everyone,

I am trying to publish a LAS file on a map. I found these examples on https://github.com/potree/potree/ and what I need is as potree+cesium example.
To do that I followed the descripted procedure: I converted my LAS file with potree-converter, copied the folder under potree-dev/pointcloud/ and copy an html from the example folder and link to my cloud.js file.
My cloudpoint is displayed in Russia insted of Italy, is not georeferenced. I opened the LAS file with LASinfo and the coordinates seems:

number of point records: 4991131
number of points by return: 4991131 0 0 0 0
scale factor x y z: 0.01 0.01 0.01
offset x y z: 4600000 1100000 4100000
min x y z: 4670817.18 1194567.51 4161555.95
max x y z: 4671107.53 1194661.47 4161868.43
variable length header record 1 of 1:
reserved 0
user ID 'LASF_Projection'
record ID 34735
length after header 24
description 'by LAStools of rapidlasso GmbH'
GeoKeyDirectoryTag version 1.1.0 number of keys 2
key 1024 tiff_tag_location 0 count 1 value_offset 3 - GTModelTypeGeoKey: ModelTypeGeocentric
key 2048 tiff_tag_location 0 count 1 value_offset 4326 - GeographicTypeGeoKey: GCS_WGS_84
reporting minimum and maximum for all LAS point record entries ...
X 7081718 7110753
Y 9456751 9466147
Z 6155595 6186843

Where am I wrong?
Thanks for your help

[arjan-kuiper]

I believe the projection from the las file is not automatically copied to your cloud.js/metadata.json. This has to be done manually.
See issue #174 and #544

If you're using EPSG:4326 you have to put +proj=longlat +datum=WGS84 +no_defs as your projection value.

[yulan0215]

I believe the projection from the las file is not automatically copied to your cloud.js/metadata.json. This has to be done manually. See issue #174 and #544

If you're using EPSG:4326 you have to put +proj=longlat +datum=WGS84 +no_defs as your projection value.

Hi, I am sorry if I used EPSG: 5652, what should I input? Same? Thx

[arjan-kuiper]

I believe the projection from the las file is not automatically copied to your cloud.js/metadata.json. This has to be done manually. See issue #174 and #544
If you're using EPSG:4326 you have to put +proj=longlat +datum=WGS84 +no_defs as your projection value.

Hi, I am sorry if I used EPSG: 5652, what should I input? Same? Thx

It should be
+proj=tmerc +lat_0=0 +lon_0=9 +k=0.9996 +x_0=32500000 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs

You can use EPSG.io to figure out what the correct projection is for the coordinate system that you are using.

[gzotti]

Thank you for this line! Not finding any docs, I had hoped it was as simple as "EPSG:5652".