gis

gisthon.kktix.cc

GISthon - KKTIX

GIS技術之全台推廣計畫，希望初期藉由網友技術交流的方式(即視松, GISthon)，發掘出更多社運團體的GIS技術需求，以及藉由交流的方式彼此教學相長，以利於提升使用GIS軟體的技能。 

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可能会说谎的地图-重新审视全国疫情的地理格局

疫情地图，你知道多少？

marketing.geo.com.tw

水利署水岸土地認養維護媒合平台

水利署水岸土地認養維護媒合平台

Image from iOS

geoman.io

Geoman - GeoJSON Editor, Leaflet-Plugins and more tools for your teams

Draw, Edit and Share map layers with the most powerful GeoJSON editor

chewei 2020-02-14 01:19:44

對比 geojson.io ，畫圖方案多了 畫圓圈、圓點型point~

3 2

Uber Engineering Blog

H3: Uber's Hexagonal Hierarchical Spatial Index

Uber developed H3, our open source grid system for optimizing ride pricing and dispatch, to make geospatial data visualization and exploration easier and more efficient.

kiang 2020-02-19 13:41:01

對 PostGIS 依賴會有什麼問題嗎？畢竟也是開放原始碼程式

kiang 2020-02-19 13:45:34

以目前工廠的數量來看用點處理還算輕鬆自在，發展索引系統大多是為了要進行大規模資料檢索，除了蜂巢系統，也可以參考 Google 的 Open Location Code
https://en.wikipedia.org/wiki/Open_Location_Code

ronnywang 2020-02-19 14:12:54

對 posigis 的依賴好像會比對 uber 的依賴好吧 XD

ronnywang 2020-02-19 14:15:17

Postgis 本身用的 API 都是 OpenGIS 標準實作，與 sqlite 的 spartialite 或是 nodejs 的 turfjs 相同，又都是開源的，對 postgis 依賴應該不是壞事吧

cph 2020-02-19 19:46:59

純粹是因為 PostGIS 的安裝比較麻煩

1 😮 1

Open Location Code

The Open Location Code (OLC) is a geocode system for identifying an area anywhere on the Earth. It was developed at Google's Zürich engineering office, and released late October 2014. Location codes created by the OLC system are referred to as "plus codes". Open Location Code is a way of encoding location into a form that is easier to use than showing coordinates in the usual form of latitude and longitude. Plus codes are designed to be used like street addresses, and may be especially useful in places where there is no formal system to identify buildings, such as street names, house numbers, and post codes.Plus codes are derived from latitude and longitude coordinates, so they already exist everywhere. They are similar in length to a telephone number – 849VCWC8+R9, for example – but can often be shortened to only four or six digits when combined with a locality (CWC8+R9, Mountain View). Locations close to each other have similar codes. They can be encoded or decoded offline. The character set avoids similar looking characters, to reduce confusion and errors, and avoids vowels to make it unlikely that a code spells existing words. Plus codes are not case-sensitive, and can therefore be easily exchanged over the phone.Since August 2015, Google Maps supports plus codes in their search engine. The algorithm is licensed under the Apache License 2.0. and available on GitHub.Google states that plus codes are accepted as postal addresses in Cape Verde, parts of Kolkata, and the Navajo Nation.

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