Skip to main content

Installation

IGEO7 is implemented in DGGRID (the core C++ engine) and accessed via the dggrid4py Python wrapper. You need both.

1. Install DGGRID​

DGGRID is a C++ command-line tool. You need a compiled binary on your system.

Pre-built binaries​

Download a pre-built binary from the DGGRID releases page.

Build from source​

git clone https://github.com/sahrk/DGGRID.git
cd DGGRID
mkdir build && cd build
cmake -DCMAKE_BUILD_TYPE=Release ..
make -j$(nproc)
sudo make install   # installs to /usr/local/bin/dggrid

Requirements: CMake ≥ 3.12, a C++17 compiler (GCC ≥ 7 or Clang ≥ 5).

Verify the installation:

dggrid --version

Setting the path​

dggrid4py locates the DGGRID binary via the DGGRID_PATH environment variable or an explicit path in the API call:

export DGGRID_PATH=/usr/local/bin/dggrid

2. Install dggrid4py​

dggrid4py is the Python wrapper that drives DGGRID programmatically.

With pip​

pip install dggrid4py

With conda / mamba​

conda install -c conda-forge dggrid4py

Dependencies​

PackagePurpose
geopandasGeospatial DataFrames with geometry support
shapelyGeometry objects (polygons, points)
pandasTabular data
numpyArray operations

All are installed automatically.

3. (Optional) DGGAL / pydggal​

For a pure-Python alternative with no subprocess calls, DGGAL implements IGEO7 natively as ISEA7H_Z7. Install the Python binding:

pip install dggal

4. Verify the setup​

import os
from dggrid4py import DGGRIDv7

dggrid = DGGRIDv7(
    executable=os.environ.get("DGGRID_PATH", "/usr/local/bin/dggrid"),
    working_dir="/tmp",
    capture_logs=True,
    silent=True,
)

# Quick sanity check: generate grid stats for resolution 5
df = dggrid.grid_stats_table("IGEO7", 5)
print(df)

Expected output (truncated):

   Resolution  # Cells     Area (km^2)
0           0       12  51006562.172409
1           1       72   7286651.738916
...
5           5   168072      3034.840374
Working directory

dggrid4py creates temporary metafiles in working_dir. /tmp works well on Linux/macOS. The directory is cleaned up automatically after each call.

Next Steps​