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Questions tagged [hgt]

A format where SRTM files are encoded in

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0answers
11 views

How to specify HGT file name in gdal_translate command?

gdal_translate command is generating a HGT file with user defined name but its giving an error as `N5464347W74.hgt' not recognized as a supported file format. Below is the command and the entire ...
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1answer
62 views

Print elevation of different coordinates from .hgt file [closed]

I am trying iterate through the data(elevation) from .hgt file. I have attached the codes which i used to get the elevation from the file. from gmalthgtparser import HgtParser hgt_file='N09E076....
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0answers
9 views

Seeking Java libraries that encapsulate HGT files download and returning elevation data on demanded area?

The googling of Java HGT libraries recovered processing libraries only, not covering the selection of the HGT files of the desired area and accessing them from their hosts. Is there something ...
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1answer
191 views

How to open .hgt files on QGIS 3.2?

I have downloaded a hgt file from EarthExplorer but when I try to load it on QGIS I get an error "GDAL provider cannot open GDAL dataset". I was under the impression that hgt files were supported. It ...
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0answers
70 views

Generating a Map (like Google Maps) using HGT files

I'm doing a programming project. It consists of generating a Map (like Google Maps) from height files .HGT Currently, I can read each file .hgt (each .hgt file have 1201 * 1201 elevation data). For ...
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1answer
280 views

Getting correct elevation from hgt file [closed]

When reading SRTM3 data from a .hgt file I get the wrong elevation of a specific latitude longitude and I can't see why. Maybe someone can see the problem ? My coordinate is near Lissabon in the sea ...
1
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1answer
345 views

How to open .hgts file from NASADEM data

I have the NASA SRTM1 data as .hgt files from their ftp website, but I would have these elevation data in respect to WGS84. I found by NASA's ftp site a folder named srtmOnly that contains what I want,...
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0answers
276 views

Which DEM format is efficient .tiff or .hgt

I know this is a vague question, but I've no expertise in GIS world. I was building this terrain map for a game like simulation project that I'm invested in. Data accuracy is least or no concern, but ...
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1answer
55 views

r.viewshed output location

I'm very new on GRASS and trying to extract the viewshed of a SRTM HGT file. This is what I've done so far: (why I'm using GRASS command line this way is not in question. Please answer this same way) ...
1
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1answer
843 views

Extracting data from hgt files?

SRTM3 .hgt files have 1201*1201 DEM elevation data, I extract .hgt files data elevation into file Elevation.json with index.js with the help from this GitHub project. Then I rename Elevation.json ...
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0answers
158 views

Generating HGT Files from SRTM 90m Digital Elevation Database v4.1?

This may be a really dumb question and I apologize if it is - this is pretty new to me. I'm using the HGT files from https://dds.cr.usgs.gov/srtm/version2_1/SRTM3/ with a program currently and want ...
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1answer
403 views

Splitting and converting a large tif files into multiple .hgt files

I'm quite new to GIS format and conversions, so be patient with a newbie. I got stuck on a file conversion and I'm looking for some help this to fix my scripts. I have a big 5 GB tif file with a ...
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1answer
357 views

Geo transform matrix

What does it mean "Source image must have a geo transform matrix" during gdal_translate when I want to export geotiff to .hgt file. I know what a matrix is, but don't know how to make one.
3
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1answer
431 views

SRTM data represented in 3D using Unity. Problem texturing with sat images

I'm currently working on a project that represents geographic data in 3D using Unity. It basically loads, when given a GPS position, the area around it. For example, given the coordinate 50.5N 6.5E it ...
2
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1answer
361 views

Why there's a break between each .hgt srtm tile when importing to QGIS?

When I import the .hgt srtm elevation data to QGIS, the each tiles(each .hgt files) stitches with with a break or contrast variance or something like this: And it gets worst when rendering it with ...
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1answer
140 views

postgis SRTM3 different raster scale in same column

SRTM3 elevation data are stored in HGT files each containing 1201x1201 values. I want to store this information in a PostGIS raster column with a single band. To optimize my queries, I wanted to ...
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0answers
493 views

How get latitude, longitude and altitude from SRTM SWBD and .hgt files in one table

I know this question may seem repetitive but I am not able find a solution hence I am asking this question . 1)I have downloaded OSDM data, SRTM SWBD data and also the corresponding .HGT file ...
1
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1answer
457 views

dt1 to hgt conversion

I have an application that generally uses .hgt files for 3-arc-second resolution of elevation data. A military user has asked us to use .dt1 files (also 3-arc-second resolution) that they have ...
3
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0answers
166 views

Questions about SRTM , .hgt format and the sea level/coastline [closed]

What a nice place here ! The questions/answers system is very elegant. I have read and get some useful informations allowing me to write a little .hgt reader... I am working on C.G.I and create 3d ...
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1answer
3k views

QGIS 2.2: GDAL Grid (Interpolation) Error

As much as i understand Raster -> Analysis -> Raster (Interpolation) can provide me with a terrain file out of a shape file with a Z coordinate. I select the input and output file and a Z field. It ...
3
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2answers
2k views

How do you convert SRTM HGT elevations from WGS84 into meters above sea level?

I am building a JavaScript script that reads binary HGT files - as generated by the SRTM - and converts the data into bitmaps viewable in your browser. You can try out the script and view the source ...
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1answer
2k views

Conversion from CGIAR GEOTIFFs to SRTM3 like HGTs

Im writing a C program for querying height information from SRTM data. Since reading directly GeoTIFF format is tough job, I decided to load HGT format, which serves great for the purpose. Since ...
6
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1answer
2k views

How can I convert a tif or xyz file to HGT?

Due to system incompatibilities between projects, I have been asked to convert my DEM which is in geotif format to HGT. I have no experience with HGT and cannot find any export options to this format....