September 02, 2023

Modeling of mixing water / effluent with OpenFoam and HatariUtils - Tutorial

September 02, 2023/ Saul Montoya

Modeling flow on open channels and simulating water mixing to evaluate the final concentrations and mixing area was a hard task with conventional open source software. Based on our research and app development we came up with a process to model flow of water and effluent mixing and then calculate the mass flux with the initial concentration of certain chemical components to have a fully 3d simulation of the concentration development with time and distance from source.

August 17, 2023

State of the art of open digital elevation imagery and online watershed delineation - Tutorial

August 17, 2023/ Saul Montoya

The processes of working with digital elevation models (DEMs) and watershed delineation are in constant change over time. Even though the elevation datasets date from 10 years ago; the web servers and tools for data processing have changed in recent years. With online tools such as Hatari Utils, the watershed delineation can be performed in a few steps with practical outputs as vector files and watershed statistics.

August 07, 2023

How to make a wind rose online with Hatari Utils - Tutorial

August 07, 2023/ Saul Montoya

This is an applied tutorial for the online representation of a wind rose with Hatari Utils from wind speed and direction stored on an CSV file or inserted in an online form. The tutorial explores the online options of Hatari Utils to represent windroses as bars, boxes, polygons or contours.

July 26, 2023

Online main channel determination from a river network with Hatari Utils - Tutorial

July 26, 2023/ Saul Montoya

If you want to determine the longest channel of a river network automatically this feature Hatari Utils might be of your interest. Hatari Utils is a toolbox for different analysis in water resources and beyond. On the “watershed delimitation” tool you can define the catchment, the river network and now you can define the main channel (longest succession of segments that connect a source to the outlet of the basin) automatically on the catchment delineation.

July 24, 2023

Online watershed delimitation with Hatari Utils - Tutorial

July 24, 2023/ Saul Montoya

Never before the process of watershed delimitation became so easy. We have developed an online tool for basin and river network extraction from a geospatial raster and export them as ESRI shapefiles. This app allows to process a river basin in few steps on a extremely friendly environment.

July 17, 2023

How to measure strike and dip from rasters with QGIS and ThreePointMethod plugin - Tutorial

July 17, 2023/ Saul Montoya

If you have a geological contact as a geospatial and you want to calculate/measure the strike and dip at a certain point, this tutorial might help you. The ThreePointMethod is a QGIS plugin that calculates a plane strike and dip direction using the three-point method. It works with a point shapefile and a digital elevation model.

June 22, 2023

Online Mapping Urban Temperature with Istsos and Python - Tutorial

June 22, 2023/ Saul Montoya

Geospatial mapping of environmental variables is key to understand habitats and in this case urban habitats. We have done research in temperature mapping stored in the cloud with Raspberrys and a Istsos server, this time we have coupled a gps sensor to make urban temperature map from the data retrieved from the server. This tutorial shows the procedure to retrieve the data, convert it to a geopandas datagrame, export as ESRI shapefile and undertand the temperature distribution relation with the land cover.

June 12, 2023

How to install the geological Python library Gempy in Windows with WSL - Tutorial

June 12, 2023/ Saul Montoya

Gempy is an open-source library for modeling geology written in Python. The library is capable of creating complex 3D geological models including structures, fault networks, and unconformities and it can be coupled with uncertainty analysis.

This tutorial is developed under a Ubuntu 20.04.2 image installed from the Windows Store and covers all the steps to setup the user, install core packages, install Python packages and set up local paths to have a complete Gempy enviroment running under Jupyter lab.

June 02, 2023

Journal of online sensor setup on a Raspberry Pi under the Istsos framework (SOS Standard)

June 02, 2023/ Saul Montoya

We dont call this article a tutorial since not all steps of the sensor settings would be explained. It might be the idea of this article to show the general panorama of the sensor installation on a Raspberry Pi under the Istsos framework that implements the SOS standard.

May 15, 2023

Groundwater flow modeling using Dupuit approximation with Python and Landlab - Tutorial

May 15, 2023/ Saul Montoya

This tutorial covers a simulation example of groundwater flow and groundwater discharge with the GroundwaterDupuitPercolator component of Landlab. Simulation is run on steady state over a one layer aquifer and results are plotted on charts and grids.

May 10, 2023

Channel network delimitation from a raster DEM with Python and Landlab - Tutorial

May 10, 2023/ Saul Montoya

Based on the several components of Landlab together with other Python packages some procedures can be established to extract single or multiple stream networks from a digital elevation model (DEM) raster and export them as vector spatial data formats as ESRI shapefiles or plot them in Jupyter Lab.

May 08, 2023

Land Cover Change Analysis with Python and Rasterio - Tutorial

May 08, 2023/ Saul Montoya

This tutorial covers the complete procedure to create a land cover change raster from a comparison of generated vegetation index (NDVI) rasters by the use of Python and the Numpy and Rasterio libraries. Results of the NDVI for given years and NDVI change are plotted on Jupyter Lab as color grid and contour grid.

April 19, 2023

How to install (easy way) Python, Geopandas and Rasterio in Windows - Tutorial

April 19, 2023/ Saul Montoya

Geopandas is an amazing library for spatial analysis since it combines the spatial tools from Shapely and Fiona with the versatility of Pandas Dataframes. Rasterio is one of the most complete libraries to deal with raster files in Python.

We are aware that most geoscientists, water resources specialists and related professionals work on Windows, therefore we are always in the search of new ways to get Python working with all its geospatial capabilities in every computer.

Based on the new Anaconda releases now we can install Geopandas and Rasterio in a easy way.

July 11, 2022

Interactive cross section generator for a voronoi gridded Modflow 6 model - Tutorial

July 11, 2022/ Saul Montoya

We are allways on the research of new visualization tools for groundwater models and that would imply the review of different apis, codes and backends. This time we have done an applied example for the interactive generation of cross section from a Modflow 6 model with a voronoi mesh on a Jupyter notebook. The cross section shows the model grid, head distribution as a color grid and contours and its generated from the line delineation over the 2d view of the model grid. The code can be easily adapted to any Modflow model by editing the Python and Flopy code.

July 06, 2022

Regional groundwater Modflow 6 model with Voronoi Mesh - Tutorial

July 06, 2022/ Saul Montoya

We have developed a version of our Angascancha basin case study that runs on MODFLOW 6 with discretized by vertices (DISV). The model implements a Voronoi mesh that is generated from the basin boundary and river network and the refinement levels are defined by a minimum and maximum cell size together with determined refinement steps. The tutorial is complete in all the steps involving the model discretization, construction, simulation and visualization.

June 17, 2022

Geospatial representation drone camera coordinates with Python and Folium - Tutorial

June 17, 2022/ Saul Montoya

If you have a set of drone imagery and you want to know the location and direction of the camera, this tutorial might be interesting for you. We have done an applied example that retrieves the geospatial metadata from the drone camera for a group of images and makes a geostapatial repretacion on a map with the image name available as popup. The tutorial is done under a Jupyter notebook with Python and Folium.

December 28, 2021

VOCs and PFAs Interactive Spatiotemporal Representation with Python and Folium - Tutorial

December 28, 2021/ Saul Montoya

Analysis of groundwater chemistry is a difficult task for the limited set of monitoring samples, the limited samples and the limited analized components. In order to assess the actual extension of a contamination plume or the efficiency of remediation techniques we need new and innovative methods to plot and analyze water chemistry data with open source data. We have done an applied case of interactive VOCs and PFAs representation on a Jupyter notebook with Python, Folium and Ipywidgets. The dataset has more than 3300 samples of 127 points over a period of 30 years and corresponds to a contaminated site of a former airfield.

November 10, 2021

Data extraction and spatial / 3D representation from BGS borehole data in AGS format with Python

November 10, 2021/ Saul Montoya

Open lithology datasets are scarce and most times they come in certain exchange formats that can´t be easily coupled with other softwares. Python has the tools to read and extract data from those files and provide them in more friendly formats as csv or xlsx. With the use of spatial libraries as Fiona or 3D visualization libraries as Pyvistas we can go one step further and process our data as shapefiles or vtks.

June 24, 2021

How to install the Python geological modeling library Gempy in Windows with Debian and WSL

June 24, 2021/ Saul Montoya

Due to the required packages and specific configuration the installation of Gempy is a challenge on Windows, we have developed an alternative installation process by the use of a Debian kernel under a Windows Subsystem for Linux. This tutorial shows the complete procedure to install Gempy from the Debian kernel setup to the review of the Gempy in Python.

June 21, 2021

How to create a point/line/polygon shapefile with Python and Fiona - Tutorial

June 21, 2021/ Saul Montoya

Storage, management and analysis of geospatial vector data as an ESRI shapefile is a common procedure of GIS and related professionals. The generation of these spatial files can be done not only on a desktop software but also by Python commands. We have created an applied example that shows the procedure in Python to create point, line, and polygon shapefiles from a csv file by the use of the Fiona library.

Blog