Monday, March 3, 2025

Matlab: Export the selected polygons from the Shapefile

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% Shp Path
shppath='NFDB_poly_20210707.shp';
S = readgeotable(shppath);
[~, prjname, ~]=fileparts(shppath);
prjpath=[prjname, '.prj'];

% Example: Select polygons where 'LandType' is 'Forest' and 'Area' > 1000
selected_rows = S(S.SRC_AGENCY == "MB" & S.YEAR ==2017, :);


% Loop
for ii=5:10
    rows=selected_rows(selected_rows.MONTH==ii, :);


    otpath=2017*100+ii;
    copyfile(prjpath, [num2str(otpath), '.prj']);
    otpath=[num2str(otpath), '.shp'];

    shapewrite(rows, otpath);
    

end

Wednesday, February 26, 2025

Data: Purple Air Data

File. V2
  1. https://www2.purpleair.com/
  2. https://api.purpleair.com/#api-sensors-get-sensors-data

Monday, February 17, 2025

Matlab: Batch Mapping

This program requires all images and shapefiles to be in a **Geographic Coordinate System**.
Mapping with a large number of latitude and longitude points.

Wednesday, February 12, 2025

Matlab: MCD64A1

This program can extract burnt locations from MCD64A1 products. file.

Thursday, January 30, 2025

MODIS tile distribution

原始影像来自MOD44W。files
The original imagery is from MOD44W.
每次下载后,请在E盘下打开MXD文件。
After each download, please open the MXD file in the E drive.
本目录的目的在于确定目标区域覆盖的MODIS分区(TILES)。
The purpose of this directory is to determine the MODIS tiles covering the target area.
List of the target areas:
Manitoba: h11v03, h11v04, h12v03, h13v03; -95, 49, -102, 60