SG-GRD-Z → BMP · Windows

Convert SG-GRD-Z to BMP

Need SG-GRD-Z data as BMP for someone without GIS software? reaConverter handles the conversion offline and in bulk.

Manual SG-GRD-Z to BMP conversion wastes hours. reaConverter automates the process — just add files and click Convert. Everything happens offline on your computer. No uploads, no cloud risks. Survey and cadastral data stays on your machine, with no upload at any point.

DownloadSG-GRD-Z to BMP ConverterConvert
SG-GRD-Z to BMP
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.sg-grd-z.BMP
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Converting files since 2001

Runs offline — nothing uploaded

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How to Convert Multiple .sg-grd-z Files to .bmp?

1. Download and Install reaConverter

Download reaConverter and install it in seconds. The setup is straightforward — no complex configuration, no extra software required.

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Install reaConverter

2. Load your SG-GRD-Z files

Open reaConverter and add your SG-GRD-Z files. You can load individual files, entire folders, or even nested subfolders.

Drop your SG-GRD-Z files into the window or use File menu to browse and select folders.

Load your SG-GRD-Z files into reaConverter

3. Select BMP as output format

Choose BMP for output and set your save location. reaConverter lets you customize quality and apply edits before conversion.

Select BMP as output format

4. Start SG-GRD-Z to BMP conversion

Hit Convert and let reaConverter do the work. The progress window shows status for each file in real time.

Start Conversion

After conversion, find your BMP files in the output folder. Click 'Show converted files' to open it directly.

Step by step

How It Works

reaConverter offers the fastest, simplest solution for converting your SG-GRD-Z files into BMP without GIS software - all files processed on your PC for maximum privacy and speed.

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Technical note

SG-GRD-Z to BMP: what carries over and what does not

Every cell in an SG-GRD-Z file holds a measurement rather than a colour, usually elevation in metres, running from sea level up to whatever the highest point in the tile happens to be. BMP stores brightness, so the conversion stretches that range across a grey or colour scale. What you get is a readable picture of the terrain, and it is the right thing for a relief map or a figure. What you no longer have is the data: sampling a pixel in the BMP returns a shade, not an altitude. Missing cells in an elevation grid, such as water, radar shadow or the edge of a survey, are not empty: they hold a sentinel value, -32768 in SRTM, -32767 in DTED and very often -9999 in ESRI grids. Counted as a real height, that value stretches the scale so far that the actual terrain collapses into a few near-identical shades. When a BMP output looks flat and washed out, a void treated as data is the usual cause.

Map Data Workflow

Turn GIS data into something anyone can open

A map saved as BMP opens on any computer and any phone. reaConverter produces those from SG-GRD-Z in batch, entirely offline.

  • Render every file in a folder to BMP with the same size and settings
  • Set DPI and output dimensions before the run, not afterwards
  • Stamp a text watermark, such as a project name or a date, on every image
  • Pick up new data automatically with Watch Folders, or script the job from the command line

Everything runs on your PC, which matters for cadastral, utility and client data that should not pass through an upload form.

GIS data conversion

User reviews

What people say after the first batch

Average User Rating:4.8
Last updated on September 13, 2026
Perfect for quick conversions! When I just need to turn a few BMPs into JPGs, this online tool saves me from installing software. Three clicks and done - couldn't be simpler!
Rev. David M. Johnson
Rev. David M. Johnson
Happy Online User
This online converter works perfectly for small batches of files. I occasionally need to convert BMP to JPG, and it doesn't make sense to install software for such simple tasks. It's much easier to just visit the site, click a couple buttons, and get the same quality result in seconds.
Christopher Brown
Christopher Brown
Satisfied Customer
The best online service for quick file conversion to JPG format - at least the best I've found! Just upload your file, select the format, click a button, and you're done. An excellent free tool that just works!
Olivia Wilson
Olivia Wilson
Happy Online User
Hands down the fastest JPG converter online! Upload → Select format → Download. Free, simple, and gets the job done in seconds.
Lin Zhang
Lin Zhang
Happy Online User
We deployed reaConverter across our department to standardize file formats for our archives. The command-line support and automation features integrated perfectly into our systems. Stellar performance and zero crashes—it just works.
David R.
David R.
IT Solutions Architect
So simple! I just needed to convert a couple of files to another format, and for such a straightforward task, the online converter worked perfectly — delivering the files I needed in no time. Excellent service!
Kenneth D. Carter
Kenneth D. Carter
Satisfied Customer

FAQ

SG-GRD-Z to BMP Conversion

What are SG-GRD-Z files?

SG-GRD-Z is a compressed grid file of SAGA GIS, a free, open-source geographic information system used for terrain analysis, hydrology, soil science, and climate studies. A grid is a map made of equal cells with one value in each, such as an elevation model. The older SAGA format keeps such a grid in several separate files: one with the values, one with the description, and often one with the projection. A file with this extension packs all of them into a single archive, which is more convenient to store, copy, and send, and which takes less space because the data are compressed. The archive can be opened in SAGA GIS like an ordinary grid, without unpacking it by hand.

What are BMP files?

The BMP or Bitmap file format is a popular raster graphic format, compatible with a wide array of image processing software, both on PC and Mac computers. BMP files store grids of pixels and detailed information concerning color tones and shades, and are highly appreciated for their ability to provide increased quality images. However, due to the lack of any compression algorithm in storing pixel data, BMP images can often be very large in size and thus difficult to store or transfer.

Can reaConverter convert SG-GRD-Z to BMP?

Yes! reaConverter instantly converts .sg-grd-z to .bmp with perfect quality preservation. With its batch processing feature, you can convert multiple files at once in just a few clicks. You can even convert images directly from Windows Explorer using the right-click menu — fast and convenient.

What is reaConverter used for?

reaConverter is a Windows converter for 800+ formats, GIS data among them. For SG-GRD-Z to BMP it replaces the usual detour through QGIS, ArcGIS or ogr2ogr: add the files, pick the output format, and the whole batch converts offline. Surveyors, planners and engineering teams use it to pass data between GIS, CAD and everyday document formats.

Why choose offline conversion with reaConverter?

reaConverter is a software program that is used for offline files conversion. Your proprietary documents never leave your computer – essential for architects, engineers, healthcare and government contractors handling classified projects. Meets GDPR, HIPAA, CCPA, and corporate security policies by ensuring files never cross borders or third-party systems.

Can I convert SG-GRD-Z to BMP online?

If you only need to convert a few SG-GRD-Z files to BMP format, feel free to try our free online free online SG-GRD-Z to BMP converter — perfect for small batches with no installation needed!

How can I turn SG-GRD-Z files into BMP on my computer?

The best way to change SG-GRD-Zs to BMPs on your PC is to install a quality piece of software, such as reaConverter. This software is extremely efficient in managing a wide range of batch files conversions, including conversion from SG-GRD-Z to BMP.

How can I automate SG-GRD-Z to BMP files conversion?

reaConverter supports all the most useful automation features such as right-click сonversion and Watch Folders for the most efficient automated files conversion in any software of this type.

Is there a way to convert SG-GRD-Z files to BMP using the command prompt?

reaConverter provides full access to all its features via Windows command line, including a high-performance command-line sg-grd-z to bmp converter for batch processing.

What else can I do with reaConverter?

Convert PDFAdd watermark on imageConvert CAD formatsSet file dateConvert microscopy files

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