calculate_grid_distance

Internal function to calculate distance with fixed grid resolution,
using coordinate discretization followed by Haversine distance calculation.

internal

Specialized toolkit for processing biological and fisheries data from Peru's anchovy (Engraulis ringens) fishery. Provides functions to analyze fishing logbooks, calculate biological indicators (length-weight relationships, juvenile percentages), generate spatial fishing indicators, and visualize regulatory measures from Peru's Ministry of Production. Features automated data processing from multiple file formats, coordinate validation, spatial analysis of fishing zones, and tools for analyzing fishing closure announcements and regulatory compliance. Includes built-in datasets of Peruvian coastal coordinates and parallel lines for analyzing fishing activities within regulatory zones.

Hans Ttito

Tivy

Toolkit for Investigation and Visualization of Young Anchovies

calculate_grid_distance function

<dl><dt>lon1</dt>
<dd>Origin longitude.</dd>
<dt>lat1</dt>
<dd>Origin latitude.</dd>
<dt>lon2</dt>
<dd>Destination longitude vector.</dd>
<dt>lat2</dt>
<dd>Destination latitude vector.</dd>
<dt>resolution</dt>
<dd>Grid resolution in degrees.</dd>
<dt>unit</dt>
<dd>Distance unit.</dd></dl>

Arguments

Calculate grid distance — calculate_grid_distance

<dl>

<dt>lon1</dt>
<dd>Origin longitude.</dd>


<dt>lat1</dt>
<dd>Origin latitude.</dd>


<dt>lon2</dt>
<dd>Destination longitude vector.</dd>


<dt>lat2</dt>
<dd>Destination latitude vector.</dd>


<dt>resolution</dt>
<dd>Grid resolution in degrees.</dd>


<dt>unit</dt>
<dd>Distance unit.</dd>

</dl>

calculate_grid_distance: Calculate grid distance

Description

Usage

Value

Arguments

Details