http://www.qgistutorials.com/ko/docs/getting_started_with_pyqgis.html
=> python with qgis => pyqgis tutorial
https://blog.naver.com/sms91_/221033746201
=> qgis에서 csv불러오기 및 좌표 찍기
https://progworks.tistory.com/10
=> 좌표계 변환 및 저장
https://somlab.tistory.com/11
=> 시각화
https://gisutd.tistory.com/7
=> 시각화(등간격, 등분위, natural break 등 개념 설명)
https://gis.stackexchange.com/questions/112687/fixing-geometry-validity-errors-in-qgis
=> 유효하지않은 도형(polygon 등)일때 버퍼를 아주 살짝만 줘서 보완할 수 있음
http://www.qgistutorials.com/ko/docs/performing_spatial_joins.html
=> spatial join in qgis
https://gis.stackexchange.com/questions/214893/calculating-proportional-area-of-polygon-within-another-layers-polygon-using-qg
=> 두 폴리곤 레이어가 있고, 면적 대비 겹치는 부분의 포함 정도를 계산하고 싶을때
https://www.biz-gis.com/index.php?mid=QnA&document_srl=218341
=> 폴리곤 면적 계산 (길이 등도 계산가능, 지오메트리 도구)
https://gis.stackexchange.com/questions/123444/creating-fishnet-grid-shapefile-in-qgis
=> 폴리곤에 대한 격자 grid 생성 방법
https://gis.stackexchange.com/questions/138281/making-centroids-for-vector-grid-in-qgis
=> 격자grid 생성 후 centroid 추출
https://gis.stackexchange.com/questions/27739/filling-column-with-consecutive-numbers-in-qgis
=> field calculator에 row 번호 컬럼 추가하는 법( id만들떄)
https://www.northrivergeographic.com/qgis-adding-x-y-coordinate
=> point 데이터의 좌표 필드 추가하는 방법
http://jonathansoma.com/lede/foundations-2018/qgis/points-in-polygon/
=> 폴리곤 내부에 있는 포인트 개수 새기
https://www.osgeo.kr/17
=> 좌표계 설명 자료
https://progworks.tistory.com/75
=> dem raster image 데이터 시각화
http://www.qgistutorials.com/ko/docs/3/origin_destination_matrix.html
=> QGIS 네트워크 분석
http://blog.daum.net/geoscience/1442
=> QGIS service-area(iso-area)
https://gis.stackexchange.com/questions/227246/convert-huge-xyz-csv-to-geotiff
=> DEM파일 xyz(txt)파일로 변환
https://gis.stackexchange.com/questions/313724/grass-not-working-with-qgis-3-6/313726
=> QGIS GRASS모듈 안열리는 오류
https://www.geodose.com/2017/10/how-to-clean-topology-error-in-qgis.html
-> topology 에러 처리
https://www.azavea.com/blog/2015/12/21/tools-for-getting-data-out-of-openstreetmap-and-into-desktop-gis/
=> OSM 데이터 QGIS에서 불러오기
https://www.youtube.com/watch?v=EerXfUf-aHo
=> QGIS에서 등고선,표고점으로 Raster만들기
https://www.youtube.com/watch?v=eyl8rt-vqlI
=> QGIS 3D view 설정 방식
https://datascienceschool.net/view-notebook/ef921dc25e01437b9b5c532ba3b89b02/
-> geopandas 설명자료
http://geopandas.org/
-> geopandas 공식 설명자료
https://stackoverflow.com/questions/38961816/geopandas-set-crs-on-points
-> geoDataframe의 crs 관련 질문 (스택오버플로우)
https://gis.stackexchange.com/questions/269243/create-a-polygon-grid-using-with-geopandas
=> python에서 shp파일 읽어서 polygon에 대한 격자 grid 생성하기
https://stackoverflow.com/questions/40818679/geopandas-difference-methode-between-polygon-and-points
=> geopandas로 한 점에 대한 buffer 생성
https://gis.stackexchange.com/questions/253224/geopandas-buffer-using-geodataframe-while-maintaining-the-dataframe
=> geopandas buffer 쉬운 예제
http://geopandas.org/mapping.html
=> geopandas 공식 사이트
https://gis.stackexchange.com/questions/301251/geopandas-import-csv-make-polygons-from-x-y-coordinates-based-on-id
=> 그냥 pandas로 csv 읽어서 mapping을 이용해 geodataframe 생성하기
https://gis.stackexchange.com/questions/80881/what-is-unit-of-shapely-length-attribute
=> 두 Point간의 직선거리 계산 (shapely)
https://stackoverflow.com/questions/11015252/countig-points-in-boxes-of-a-grid
=> 2차원 그래프에서 grid를 만들고 해당 grid에 포함된 것 카운팅
https://gis.stackexchange.com/questions/319546/converting-list-of-polygons-to-multipolygon-using-shapely
=> 여러개의 폴리곤을 멀티폴리곤으로 만들기
https://gis.stackexchange.com/questions/322589/rasterizing-polygon-grid-in-python-geopandas-rasterio?noredirect=1&lq=1
=> python에서 grid 폴리곤 만들기
https://stackoverflow.com/questions/38961816/geopandas-set-crs-on-points
=> geopandas 좌표 정의 및 프로젝션
https://gis.stackexchange.com/questions/306674/geopandas-spatial-join-and-count
http://geopandas.org/reference/geopandas.sjoin.html
=> geopandas spatial join
https://www.biz-gis.com/index.php?mid=QnA&document_srl=224858
=> 좌표계 5174 -> 5179 안맞는 오류
https://gis.stackexchange.com/questions/299379/superposing-two-plots-with-geopandas-with-non-fill-colours-in-one-of-them
=> Geodataframe 여러개의 레이어 겹쳐 그리기
https://gis.stackexchange.com/questions/342512/intersection-tolerance-error-with-shapely
=> Polygon의 각 변(edge)를 linestring으로 뽑아내기
https://stackoverflow.com/questions/24415806/coordinates-of-the-closest-points-of-two-geometries-in-shapely
=> 가장 가까운 거리에 해당하는 좌표점 구하기
https://stackoverflow.com/questions/39338550/cut-a-polygon-with-two-lines-in-shapely
=> line으로 polygon 짜르기!!!!!!!!!!
https://gis.stackexchange.com/questions/277334/shapely-polygon-union-results-in-strange-artifacts-of-tiny-non-overlapping-area?rq=1
=> shapely로 polygon 결합 (dissolve 하는 방법)
http://geopandas.org/set_operations.html
=> intersection, union, difference 등 폴리곤 shape 처리 도구 설명
https://shapely.readthedocs.io/en/latest/manual.html#object.project
=> interpolate <=> project 함수 설명
https://stackoverflow.com/questions/13062334/polygon-intersection-error-in-shapely-shapely-geos-topologicalerror-the-opera
=> 유효하지 않은 Polygon과 유효한 폴리곤
https://stackoverflow.com/questions/31391209/valueerror-no-shapely-geometry-can-be-created-from-null-value
=> polygon 두개 union 할때, topology 에러 보완 (buffer를 이용한 보정)
https://m.blog.naver.com/PostView.nhn?blogId=yshmisopia&logNo=60152050508&proxyReferer=https%3A%2F%2Fwww.google.com%2F
=> Rtree 구조
https://www.crocus.co.kr/1288
=> convex hull 알고리즘
https://m.blog.naver.com/PostView.nhn?blogId=bloodsoda&logNo=221029163536&proxyReferer=https%3A%2F%2Fwww.google.com%2F
=> convex hull 알고리즘 조금 쉬운 설명
https://stackoverflow.com/questions/28260962/calculating-angles-between-line-segments-python-with-math-atan2
=> 두 line 사이의 각도 구하기(math 라이브러리를 이용한, atan, 기울기 활용)
https://m.blog.naver.com/PostView.nhn?blogId=tobsysco&logNo=90189688655&proxyReferer=https%3A%2F%2Fwww.google.com%2F
=> 각도 구하기(tan 수학 이론 설명)
https://assortrock.com/7
=> tan 삼각함수공식 (알아야 이해가능)
https://www.youtube.com/watch?v=Vs263mWhXFg
=> raster 파일 merge, QGIS 툴 사용할 수도 있고, command에서 할수도 있고(2가지 방법)
http://geologyandpython.com/dem-processing.html
=> python dem파일을 이용한 지형분석
http://andrewgaidus.com/Shapely_Geometries_Topological_Rules/
=> python으로 도로망 데이터 전처리하기(topology check)
https://shapely.readthedocs.io/en/latest/manual.html
=> shapely docs
https://automating-gis-processes.github.io/2017/lessons/L7/network-analysis.html
=> Geo-Python org, networkx, osm, open street map 등
https://gis.stackexchange.com/questions/120286/removing-small-polygon-gaps-in-shapely-polygon
=> Polygon 틈생긴거 buffer로 보정하기
https://shapely.readthedocs.io/en/stable/manual.html#object.buffer
=> shapely buffer 옵션( 모퉁이 설정 등)
https://stackoverflow.com/questions/56690524/matplotlib-geopandas-plot-chloropleth-with-set-bins-for-colorscheme
https://datascienceschool.net/view-notebook/ef921dc25e01437b9b5c532ba3b89b02/
=> Geopandas plot, symbology 범주 급간 조정하기
https://stackoverflow.com/questions/38899190/geopandas-label-polygons
https://stackoverflow.com/questions/36162414/bold-annotated-text-in-matplotlib
=> plt.annotate, polygon에 라벨 표시 및 bold, fontsize
https://kite.com/python/answers/how-to-reverse-a-colormap-using-matplotlib-in-python
=> cmap reverse 하기
http://blog.thehumangeo.com/2014/05/12/drawing-boundaries-in-python/
https://gis.stackexchange.com/questions/247085/concave-hull-by-attribute-type-solution
https://gist.github.com/dwyerk/10561690
=> convex & concave hull 알고리즘 직접 구현
https://oboki.net/workspace/programming/language/python/folium-%EC%A7%80%EB%A6%AC%EC%A0%95%EB%B3%B4-%EC%8B%9C%EA%B0%81%ED%99%94/
https://pinkwink.kr/971
=> folium 기초
https://pythonhosted.org/planar/polygon.html
=> 도형 접선 그릴때 유용한(tangent) planar 라이브러리