Samsung Electronics Co., Ltd.

Seoul National University

Snu Rdb Foundation

Myoung Su Cho

Hyun Seok Seo

Myung Geun Song

Ho Kyung Kim

Sang Yeon Kim

Jae Woong Choi

Jin W Seo

Won Kyu Lee

Myung Joo Kang

Byeong Eon Lee

Yeong Gil Shin

Young Jin Koh

Dong Jun Woo

Geon Woo Kim

Dong Kyun Jeong

A method for compressing time series data includes: reading original data including time series data; measuring a unit of the original data; determining a threshold for determining a range allowing for a difference between compressed data and the original data; performing longest distance downsampling to preserve an abnormal point of the original data; storing a start point and an end point of the original data; performing drop-out on the longest distance downsampling result, wherein the drop-out is not performed for the start point and the end point; and if the number of values of the original data is smaller than &#x3b1; times the original data length, storing at least one of the values of the original data as a reference point, wherein &#x3b1; is a real number having a value between 0 and 1.

Method for compressing and restoring time series data

Provided are a method and apparatus of filtering geographical data. The method may include selecting a map region to be retrieved, receiving a retrieval object and a retrieval condition, outputting a trapezoidal interface, verifying a threshold corresponding to a height of the trapezoidal interface for each position of the map region, filtering the retrieval object satisfying the threshold or more or less in each position of the map region to extract the filtered object, and displaying the filtered object on the map region to output the displayed object.

Apparatus and method of filtering geographical data

Growing community of inventors

Suwon-si, South Korea

Myoung Su Cho