Reference grids (vector) and their centroids for harmonization of analysis

This dataset contains reference grids (vector) and their centroids for harmonized analysis. All the files are geoparquet, they are described below. Production procedure is available at projects GitHub repository (https://github.com/aavotins/HiQBioDiv/blob/main/Templates/TemplateGrids_Vector.R):

"tikls100_sauzeme.parquet" contains terrestrial territory of Latvia divided in 100-by-100 m polygon grid cells. Contains fields:

"id" feature ID;

"yes" a fields with values "1";

"tks50km" with ID's of topographic map of Latvia pages (TKS-93 M:50000);

"rinda300" with ID's matching file "tikls300_sauszeme.parquet";

"ID1km" with ID's matching file "tikls1km_sauszeme.parquet";

"rinda500" with ID's matching file "tikls500_sauszeme.parquet";

"geom" a {sf} geometry definition field.

"tikls300_sauzeme.parquet" contains terrestrial territory of Latvia divided in 300-by-300 m polygon grid cells. Contains fields:

"rinda300" feature ID;

"x" a {sf} geometry definition field.

"tikls500_sauzeme.parquet" contains terrestrial territory of Latvia divided in 500-by-500 m polygon grid cells. Contains fields:

"rinda500" feature ID;

"tks50km" with ID's of topographic map of Latvia pages (TKS-93 M:50000);

"x" a {sf} geometry definition field.

"tikls1km_sauzeme.parquet" contains terrestrial territory of Latvia divided in 1000-by-1000 m polygon grid cells. Contains fields:

"ID1km" feature ID;

"yes" a fields with values "1";

"tks50km" with ID's of topographic map of Latvia pages (TKS-93 M:50000);

"geometry" a {sf} geometry definition field.

"pts100_sauszeme.parquet" contains centroids of file "tikls100_sauszeme.parquet" with their attribute fields;

"pts300_sauszeme.parquet" contains centroids of file "tikls300_sauszeme.parquet" with their attribute fields and additionally "tks50km" with ID's of topographic map of Latvia pages (TKS-93 M:50000);

"pts500_sauszeme.parquet" contains centroids of file "tikls500_sauszeme.parquet" with their attribute fields;

"pts1000_sauszeme.parquet" contains centroids of file "tikls1km_sauszeme.parquet" with their attribute fields;

"tks93_50km.parquet" contains topographic map of Latvia pages (TKS-93 M:50000). Contains fields:

"NOSAUKUMS" with a page name;

"NUMURS" with a page number;

"Shape_Length" an attribute from ESRI File Geodatabase;

"Shape_Area" an attribute from ESRI File Geodatabase;

"Shape" a {sf} geometry definition field;

All the above mentioned files are stored also as layers in geopakage file "vector_grids.gpkg" having the same names and attributes.

本数据集包含用于标准化分析的参考矢量格网及其质心。所有文件均采用Geoparquet（Geoparquet）格式，下文将对其进行详细说明。其制作流程可查阅该项目的GitHub仓库：https://github.com/aavotins/HiQBioDiv/blob/main/Templates/TemplateGrids_Vector.R。

"tikls100_sauzeme.parquet"包含拉脱维亚陆地领土的100×100米多边形格网单元，其字段如下：
- "id"：要素标识符；
- "yes"：值恒为"1"的字段；
- "tks50km"：拉脱维亚1:50000比例尺地形图幅（TKS-93）的编号；
- "rinda300"：与文件"tikls300_sauszeme.parquet"匹配的编号；
- "ID1km"：与文件"tikls1km_sauszeme.parquet"匹配的编号；
- "rinda500"：与文件"tikls500_sauszeme.parquet"匹配的编号；
- "geom"：{sf}格式的几何定义字段。

"tikls300_sauzeme.parquet"包含拉脱维亚陆地领土的300×300米多边形格网单元，其字段如下：
- "rinda300"：要素标识符；
- "x"：{sf}格式的几何定义字段。

"tikls500_sauzeme.parquet"包含拉脱维亚陆地领土的500×500米多边形格网单元，其字段如下：
- "rinda500"：要素标识符；
- "tks50km"：拉脱维亚1:50000比例尺地形图幅（TKS-93）的编号；
- "x"：{sf}格式的几何定义字段。

"tikls1km_sauszeme.parquet"包含拉脱维亚陆地领土的1000×1000米多边形格网单元，其字段如下：
- "ID1km"：要素标识符；
- "yes"：值恒为"1"的字段；
- "tks50km"：拉脱维亚1:50000比例尺地形图幅（TKS-93）的编号；
- "geometry"：{sf}格式的几何定义字段。

"pts100_sauszeme.parquet"包含文件"tikls100_sauszeme.parquet"的质心及其属性字段；
"pts300_sauszeme.parquet"包含文件"tikls300_sauszeme.parquet"的质心及其属性字段，额外包含"tks50km"字段，存储拉脱维亚1:50000比例尺地形图幅（TKS-93）的编号；
"pts500_sauszeme.parquet"包含文件"tikls500_sauszeme.parquet"的质心及其属性字段；
"pts1000_sauszeme.parquet"包含文件"tikls1km_sauszeme.parquet"的质心及其属性字段；

"tks93_50km.parquet"包含拉脱维亚1:50000比例尺地形图幅（TKS-93），其字段如下：
- "NOSAUKUMS"：图幅名称；
- "NUMURS"：图幅编号；
- "Shape_Length"：来自ESRI文件地理数据库（ESRI File Geodatabase）的属性字段；
- "Shape_Area"：来自ESRI文件地理数据库（ESRI File Geodatabase）的属性字段；
- "Shape"：{sf}格式的几何定义字段。

上述所有文件均以图层形式存储于Geopackage（Geopackage）文件"vector_grids.gpkg"中，图层名称与属性均与原文件保持一致。