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SEG-2 vs SEG-Y file formats

I have limited experience with the different SEG file formats and I was hoping if someone could shed some light on the current preffered file formats used in software applications and for sharing ...
MJ_Wales's user avatar
3 votes
1 answer
633 views

How to convert specific humidity ERA5 in kg/kg to g/kg or mm/day?

The specific humidity of ERA5 data is kg/kg, but some articles work with this variable in g/kg. How can I convert this? Or to compare with precipitation, evaporation, and other variables, how to ...
smi's user avatar
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1 vote
0 answers
91 views

Quality control in Seismic Acquisition - shot offset shift

I have a problem with seismic data where the minimum offset of the shot is not centered at the nearest receiver, this shift can be for 3 traces 2 or one and maybe more in the two sides !! So is there ...
Djabri Josef's user avatar
1 vote
0 answers
13 views

Reading WKT data results in border deformations

I am not a geoscientist (I do computer graphics), however I am trying to render some geospatial data encoded as a WKT file. I have a POLYGON with 2 coordinates per ...
Makogan's user avatar
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3 votes
0 answers
47 views

What is the difference between the CF standard_names `platform_id` and `platform_name`

The two CF standard names platform_id and platform_name strike me as being redundantly similar. From their definition in the CF standard name table: platform_id: alias: station_wmo_id A variable with ...
alex_danielssen's user avatar
2 votes
1 answer
103 views

Storing borehole interval data (logs) in netcdf

I have a number of datasets that describe geological properties as intervals down a borehole (e.g. unit codes, sample results) In a database, or a flat ASCII file, I would describe these with a ...
alex_danielssen's user avatar
5 votes
1 answer
134 views

Format/interpretation of NOAA Elevation Data

I've downloaded the all10g data from https://www.ngdc.noaa.gov/mgg/topo/gltiles.html and also the globedocumentationmanual.pdf from the "The Globe Project Report" link on that page. The only ...
John Forkosh's user avatar
6 votes
1 answer
134 views

How to interpret these kind of coordinates?

I am currently working on a project with my university and ran into trouble. I am building an application for indoor localization and am currently trying to benchmark our implementation. To do this I ...
Trup3s's user avatar
  • 141
4 votes
2 answers
257 views

How to open old GOES-1 satellite image files downloaded from NOAA CLASS

This is the first time I have ordered satellite imagery via the NOAA CLASS system using the shopping cart, so I am a complete novice. I have requested and downloaded old GOES-1 images from May 1979, ...
Adrian's user avatar
  • 143
3 votes
1 answer
337 views

Get atmospheric pressure values through JavaScript

I'm working on a programming project in which I want to show isobars on a map with OpenStreetMap and the HTML tag canvas. The main problem that I'm facing is the dificulty of retrieving consistent ...
black-knuckles-7's user avatar
6 votes
1 answer
1k views

Why is satellite imagery data delivered as signed 16 bit integers?

Landsat 5 tm reflectance product images are delivered as signed 16 bit images, why is this preferred to unsigned 8 bit that the DN's are stored as level 1 products for the same satellite? Look at ...
Chayan Lahiri's user avatar
6 votes
1 answer
1k views

What is the relationship between raw seismic data, CMP Stacking, NMO & Machine Learning

I recently joined a geophysics project to assist with some of their machine learning modeling but am trying to gather the domain knowledge required to participate. Something I don't quite understand ...
JGG's user avatar
  • 163
5 votes
0 answers
199 views

How to read EUMETCAST GOME-2 data?

We receive EUMETCAST data with different formats in our local station, I am having the most difficulty when trying to read or sometimes even know the format of a specific data product, in this case, ...
Akramz's user avatar
  • 51
8 votes
1 answer
942 views

Regarding compression, shuffle filter of netcdf4

I read the doc but still have no idea about what are the advantages to enable or disable the shuffle, what level [0-9] of compression is optimal, what's the best choice of chunk size?
wsdzbm's user avatar
  • 243
8 votes
1 answer
1k views

Conversion of BUFR format into grib

I am looking for Upper Air Observations (UAO) for Bay of Bengal region. I found NCEP ADP UAO dataset available in BUFR format. I am supposed to use UAO data in grib format only for the purpose of data ...
Agni's user avatar
  • 645
7 votes
1 answer
9k views

SEGD and SEGY recorded data

What is the difference between a segd recorded data and a segy recorded data and can we convert from segd to segy and vice versa?
Kunal Rathod's user avatar
2 votes
1 answer
129 views

Why do values stored in data files, such as climate model output, appear to be high?

I'm in doubt of some values for future scenarios of climate change that were downloaded from http://www.worldclim.org/version2. For example, the NCAR circulation model for ...
Emanuel's user avatar
  • 91
9 votes
1 answer
1k views

NCEP reanalysis model levels

ECMWF Model Levels The above link describes the coefficients used to define the ECMWF model levels in pressure in order to compute geopotential height. Is there a similar data for NCEP reanalysis ...
user avatar
4 votes
0 answers
101 views

Algorithm confirmation for bringing in scalar field values from Gaussian grid to rotated lat lon grid

I am posting an algorithm (more of a procedure description) and I request a review of the correctness of the algorithm. Goal - To bring in scalar field values such as temperature, geopotential height,...
user avatar
4 votes
1 answer
154 views

Why is there a logarithmic grid on this plot?

Why is there a logarithmic grid when these wireline density and neutron porosity logs have linear scale labels, and when these logs are usually displayed on linear scales?
Khaled El-kilany's user avatar
3 votes
1 answer
93 views

GIMMS NDVI3g grid cells not entirely square-shaped?

The official data description of the recently updated GIMMS NDVI3g record describes the grid parameters of the dataset as follows. ...
fdetsch's user avatar
  • 133
3 votes
2 answers
942 views

How do I read IASI GDS L1C in Python?

I'm trying to read IASI GDS Level 1C data (all spectral samples) in the EUMETSAT EPS Native Format, as documented in the Generic Product Format Specification (PDF, 738 KB, 72 pages) and the IASI Level ...
gerrit's user avatar
  • 11.7k
4 votes
1 answer
209 views

Where to start with P190s Seismic Navigation Files?

I have a few P190s navigation files from a 2D reflection seismic acquisition shoot and wondering what the best way was to extract UTM's (or latitude and longitude) and depth. I am reading through the ...
EMGeo's user avatar
  • 41
10 votes
2 answers
1k views

How to read NOAA/NASA GOES satellite data?

I requested satellite image data (GVAR_IMG) for a project that I am working on from the GOES satellite, but I don't know what format it's in or how to read it. When I open it with a text editor it is ...
scottlittle's user avatar
7 votes
3 answers
2k views

What are the fields in Petrel's IESX seismic horizon file?

I have a text file containing 23 seismic horizons from Petrel, Schlumberger's seismic earth interpretation and modelling tool, using the 2D IESX format. Here are the first few rows: ...
Matt Hall's user avatar
  • 11k
8 votes
1 answer
5k views

CDL File Questions

I'm confused by what exactly a CDL file is and what its purpose is. Unidata specifies the syntax of such a CDL file in its netCDF documentation. Questions: Are CDL files designed to be opened by a ...
user4624937's user avatar
  • 1,811
3 votes
1 answer
508 views

How to determine the number of bytes in the SEGD Revision 1 interblock gap

How can one determine the number of bytes in the SEGD Revision1 interblock gap? The quantity is present on page 5 of the standards document.
user14717's user avatar
  • 175
7 votes
0 answers
199 views

NASA GLAS Lidar Data Format [closed]

NASA GLAS Lidar Data can be downloaded here. I cannot find (or perhaps understand) the answer to my question on the icesat/glas page. Lidar data can be provided as points (las) or raster (dem), ...
J Kelly's user avatar
  • 273
12 votes
1 answer
582 views

Where and how can seismic data for earthquakes and volcanoes be downloaded?

I need it in this format. I went to USGS and IRIS websites but couldn't understand the downloading procedure
shrey's user avatar
  • 1,489
1 vote
1 answer
622 views

How to perform precipitation data analysis? [closed]

I want to make precipitation data analysis for the Latvian territory. I only have meteorological stations and reanalysis data. My data from meteorological stations are in the format: ...
Student's user avatar
  • 43
21 votes
4 answers
2k views

What would a replacement for SEGY look like?

I have been having a miserable time this week reading SEGY files. This is data from the largest seismic acquisition company in the world whose client is the 7th largest oil company in the world. So if ...
Candid Lunch's user avatar