Change projection of netcdf data and convert from UTM to lat/lon

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Louise Wilson
Louise Wilson 2021-11-27
评论： Louise Wilson 2021-11-30
I have a netcdf file
vardata=ncread('TL__Map1_15C_sand1__20mres_-36.265137N_174.790466','TLdata');
ncdisp('TL__Map1_15C_sand1__20mres_-36.265137N_174.790466')
Source:
X:\Matlab Scripts\TL__Map1_15C_sand1__20mres_-36.265137N_174.790466
Format:
netcdf4
Global Attributes:
description = 'TL data set TLmaps/TL__Map1_15C_sand1__20mres_-36.265137N_174.790466'
history = 'Created Fri Nov 12 09:55:31 2021'
source = 'netCDF4 python module tutorial'
Dimensions:
ilat = 280
ilon = 489
ifreq = 91
Variables:
TLdata
Size: 91x489x280
Dimensions: ifreq,ilon,ilat
Datatype: single
Attributes:
least_significant_digit = 2
units = 'dB'
H_latdata
Size: 280x1
Dimensions: ilat
Datatype: single
Attributes:
units = 'degN or m'
H_londata
Size: 489x1
Dimensions: ilon
Datatype: single
Attributes:
units = 'degE or m'
H_freqdata
Size: 91x1
Dimensions: ifreq
Datatype: single
Attributes:
units = 'Hz'
I know that the projection is WGS 1984 Mercator 41 and the lat/lon coordinates are in UTM.
I would like to be able to convert this grid to lat/lon, can anyone help?

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采纳的回答

Louise Wilson
Louise Wilson 2021-11-30
I have since realised that it is not logical to modify the spatial data in this way as it would break the regularity.

更多回答（1 个）

Rishabh Singh
Rishabh Singh 2021-11-29
Hey Louise,
If you wish to convert the UTM to lat-lon cordinates I would suggest looking into UTM2LL.
Disclaimer: UTM2LL is a File Exchange submission. Please contact the author of UTM2LL in case of any issue.
  3 个评论
显示 1更早的评论
Rishabh Singh
Rishabh Singh 2021-11-30
Could you provide more insight on this issue of yours regarding lat/lon array of different sizes?
Louise Wilson
Louise Wilson 2021-11-30
My latitude array is 280, and the longitude array is 489. It appears you cannot convert these using utm2ll or utm2deg. I have answered this question as I understand now that it's not appropriate to convert the array in the first place.

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