Shroomer Polski

Data sources of the conditions map

Last updated: 12 October 2026

The fruiting-conditions map in the Shroomer app is computed from the weather, forest and soil data below. Each source has its own licence or terms; this page gives the required notices, citations and a description of our changes. Shroomer is not affiliated with or endorsed by any data provider. The map shows conditions, not the probability of finding mushrooms.

Natural Earth

Provider	Natural Earth
Product	Admin 0 countries 1:10m (Poland outline)
Licence / terms	Public domain
Source	https://www.naturalearthdata.com/
Changes	Reprojected to EPSG:2180 and used as the national mask.

ECMWF IFS open data

Provider	European Centre for Medium-Range Weather Forecasts (ECMWF)
Product	IFS open data, oper/fc, 0.25°, 00 UTC cycle: 2t, tp, sot, vsw
Licence / terms	CC BY 4.0
Source	https://www.ecmwf.int/en/forecasts/datasets/open-data
Required notices	This service is based on data and products of the European Centre for Medium-Range Weather Forecasts (ECMWF). Source: www.ecmwf.int This ECMWF data is published under a Creative Commons Attribution 4.0 International (CC BY 4.0). ECMWF does not accept any liability whatsoever for any error or omission in the data, their availability, or for any loss or damage arising from their use.
Changes	Cropped to Poland, units converted, cumulative rain differenced, aggregated to Warsaw-local days, sampled onto a 1 km grid and combined into a fruiting-conditions index.

ERA5-Land

Provider	Copernicus Climate Change Service (C3S), ECMWF
Product	ERA5-Land hourly data from 1950 to present (reanalysis-era5-land)
Licence / terms	CC BY 4.0
Source	https://cds.climate.copernicus.eu/datasets/reanalysis-era5-land
Citation	Muñoz Sabater, J. (2019): ERA5-Land hourly data from 1950 to present. Copernicus Climate Change Service (C3S) Climate Data Store (CDS). DOI: 10.24381/cds.e2161bac
Required notices	Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.
Changes	Recent days and the 1991–2020 climatology: units converted, rain deaccumulated, regridded to the IFS 0.25° grid, aggregated to days, turned into a moisture balance and quantiles, and combined into a fruiting-conditions index.

NOAA GFS

Provider	NOAA / NCEP
Product	GFS 0.25°, archived 00 UTC cycles (fallback only)
Licence / terms	U.S. public domain
Source	https://registry.opendata.aws/noaa-gfs-bdp-pds/
Changes	Used only when IFS or ERA5-Land days are missing; same processing as IFS.

CLMS Forest Type 2021

Provider	European Union, Copernicus Land Monitoring Service (EEA)
Product	High Resolution Layer Forest Type 2021, 100 m (clms_vlcc_forest-type_europe_100m_3yearly_v1)
Licence / terms	Copernicus data policy (free, full and open; attribution required)
Source	https://land.copernicus.eu/en/products/high-resolution-layer-forests-and-tree-cover
Required notices	Generated using European Union's Copernicus Land Monitoring Service information. The CLMS product was modified by Shroomer; the European Union does not endorse this service.
Changes	Mosaicked over Poland, aggregated to forest and conifer shares per 1 km cell, joined with OpenStreetMap woodland to draw forest areas, and vectorised.

CGLS LC100 2019

Provider	Copernicus Global Land Service
Product	Land Cover 100 m v3.0.1, 2019 (fallback only)
Licence / terms	CC BY 4.0
Source	https://zenodo.org/records/3939050
Required notices	Generated using Copernicus Global Land Service information.
Changes	Forest classes aggregated to forest and conifer shares per 1 km cell.

SoilGrids 2.0

Provider	ISRIC – World Soil Information
Product	SoilGrids 2.0 phh2o and sand, 0–5 cm, 1 km aggregates
Licence / terms	CC BY 4.0
Source	https://isric.org/explore/soilgrids
Citation	Poggio, L., de Sousa, L. M., Batjes, N. H., Heuvelink, G. B. M., Kempen, B., Ribeiro, E., and Rossiter, D. (2021): SoilGrids 2.0: producing soil information for the globe with quantified spatial uncertainty. SOIL 7, 217–240. https://doi.org/10.5194/soil-7-217-2021
Changes	Reprojected to the 1 km grid, units converted, holes up to 5 km filled from neighbours.

Bank Danych o Lasach

Provider	Państwowe Gospodarstwo Leśne Lasy Państwowe
Product	BDL WFS, 17 RDLP_*_wydzielenia stand layers (state forests)
Licence / terms	BDL portal terms, part V (reuse of public information)
Source	https://www.bdl.lasy.gov.pl/portal/
Required notices	Źródło: Bank Danych o Lasach, stan danych 2026 (a_year), pozyskano 5.10.2026.
Changes	Stand attributes aggregated per 1 km cell by intersection area into host, site and moisture-class shares.
Data as of	2026
Obtained	2026-10-05
Open question	How the 'originally obtained form' clause applies to WFS data and derived aggregates.

IMGW-PIB RainGRS

Provider	Instytut Meteorologii i Gospodarki Wodnej – Państwowy Instytut Badawczy
Product	RainGRS hourly precipitation grs_60_asc (Oper/ and Arch/Nowcasting)
Licence / terms	IMGW-PIB data terms (regulamin udostępniania danych)
Source	https://danepubliczne.imgw.pl/
Required notices	Źródłem pochodzenia danych jest Instytut Meteorologii i Gospodarki Wodnej – Państwowy Instytut Badawczy. Dane Instytutu Meteorologii i Gospodarki Wodnej – Państwowego Instytutu Badawczego zostały przetworzone.
Changes	Hourly fields summed per Warsaw-local day and blended with model rain.
Open question	Whether hourly RainGRS falls under the high-value dataset rules of Regulation (EU) 2023/138 for business use.

BDOT10k

Provider	Główny Urząd Geodezji i Kartografii (GUGiK)
Product	BDOT10k schema 2021, OT_PTLZ_A (RODZAJ=las)
Licence / terms	Public data, free reuse (Prawo geodezyjne i kartograficzne)
Source	https://opendata.geoportal.gov.pl/bdot10k/schemat2021/GeoParquet/OT_PTLZ_A.parquet
Changes	Forest tracts intersected with 1 km cells and used to group named forests.

PRNG

Provider	Główny Urząd Geodezji i Kartografii (GUGiK)
Product	Państwowy Rejestr Nazw Geograficznych: towns, villages, forests and forest complexes (WFS)
Licence / terms	Public data, free reuse
Source	https://mapy.geoportal.gov.pl/wss/service/PZGiK/PRNG/WFS/GeographicalNames
Changes	Name points matched to forest areas; forest complexes given a search radius.

PRG

Provider	Główny Urząd Geodezji i Kartografii (GUGiK)
Product	Państwowy Rejestr Granic, communes and national boundary
Licence / terms	Public data, free reuse
Source	https://www.geoportal.gov.pl/pl/dane/panstwowy-rejestr-granic-prg/
Changes	Simplified for map tiles; used to clip other layers.

GDOŚ protected areas

Provider	Generalna Dyrekcja Ochrony Środowiska (GDOŚ)
Product	WFS GDOS:ParkiNarodowe, GDOS:Rezerwaty and the Natura 2000 areas (OSO, SOO)
Licence / terms	Public data, free reuse
Source	https://sdi.gdos.gov.pl/wfs
Required notices	Boundaries are not a legal determination of the protected area limits.
Changes	Parks and reserves: buffer zones dropped, clipped to Poland, simplified 20 m. Natura 2000: only areas named after a forest complex, reduced to a name, a centre and a search radius.

OpenStreetMap

Provider	OpenStreetMap contributors
Product	Poland extract via Geofabrik: woodland, forest names, places, military land
Licence / terms	ODbL 1.0
Source	https://www.openstreetmap.org/copyright
Required notices	Contains information from OpenStreetMap, which is made available here under the Open Database License (ODbL).
Changes	See the ODbL section: derived databases and how to get them.

OpenStreetMap and the ODbL

Some published files combine OpenStreetMap data with other sources. They are derived databases under the ODbL 1.0 and we make each of them available, as a whole, under that licence. The files are at https://maps.shroomer.app/conditions/v2/static/ (listed with checksums in manifest.json, licence notice in LICENSE.txt); latest.json names the files of the current nightly run.

Contains information from OpenStreetMap, which is made available here under the Open Database License (ODbL). https://opendatacommons.org/licenses/odbl/1-0/

Files made available under the ODbL 1.0:

static/forest-cells-*.pmtiles
static/forest-outline-*.pmtiles
static/forest-names-*.pmtiles
static/forests-*.json, static/forest-members-*.npz
static/restricted-*.pmtiles
runs/<run>/cells.pmtiles, runs/<run>/forests.json

The other files (e.g. overview.pmtiles, places-*, gminy-*, habitat, climatology) hold no OpenStreetMap data and are subject to their sources' terms.