fix_coords

Normaliza latitude/longitude quando vierem em graus multiplicados por 1e7
(padrao de alguns exports de GPS) e invalida valores fora dos limites.

Tools to import, clean, validate, and analyze freshwater quality data in Brazil. Implements water quality indices including the Water Quality Index (WQI/IQA), the Trophic State Index (TSI/IET) after Carlson (1977) <doi:10.4319/lo.1977.22.2.0361> and Lamparelli (2004) <https://www.teses.usp.br/teses/disponiveis/41/41134/tde-20032006-075813/publico/TeseLamparelli2004.pdf>, and the National Sanitation Foundation Water Quality Index (NSF WQI) <doi:10.1007/s11157-023-09650-7>. The package also checks compliance with Brazilian standard CONAMA Resolution 357/2005 <https://conama.mma.gov.br/?id=450&option=com_sisconama&task=arquivo.download> and generates reproducible reports for routine monitoring workflows.
The example dataset (`wq_demo`) is now a real subset from monitoring data (BURANHEM river, 2020-2024, 4 points, 20 rows, 14 columns including extra `rio`, `lat`, `lon`). All core examples and vignettes use this realistic sample, improving reproducibility and documentation value for users.

Vinicius Saraiva Santos

tikatuwq

Water Quality Assessment and Environmental Compliance in Brazil

fix_coords function

<dl><dt>df</dt>
<dd>data.frame de entrada.</dd>
<dt>lat</dt>
<dd>Nome da coluna de latitude (padrao: "lat").</dd>
<dt>lon</dt>
<dd>Nome da coluna de longitude (padrao: "lon").</dd>
<dt>divisor</dt>
<dd>Se abs(valor) exceder os limites, divide por este numero
(padrao 1e7).</dd></dl>

Arguments

Fix and validate geographic coordinates (lat/lon) — fix_coords

<dl>

<dt>df</dt>
<dd>data.frame de entrada.</dd>


<dt>lat</dt>
<dd>Nome da coluna de latitude (padrao: "lat").</dd>


<dt>lon</dt>
<dd>Nome da coluna de longitude (padrao: "lon").</dd>


<dt>divisor</dt>
<dd>Se abs(valor) exceder os limites, divide por este numero
(padrao 1e7).</dd>

</dl>

fix_coords: Fix and validate geographic coordinates (lat/lon)

Description

Usage

Value

Arguments

Examples