http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-109102538-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G06T2207-30192 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G06T5-002 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G06T7-60 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G06T7-60 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G06T5-00 |
| filingDate | 2018-07-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2020-09-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2020-09-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-109102538-B |
| titleOfInvention | Method for extracting land characteristic points and land characteristic lines by using contour line data and weather map analysis method |
| abstract | The invention discloses a method for extracting land characteristic points and land characteristic lines by utilizing contour line data and a weather map analysis method. The invention provides a method for extracting land feature points in isofield data. According to the method, for a non-closed contour line, 3 points are selected or rejected according to the included angle of every 3 points on the contour line, the selected points form a sequence S, and land characteristic points are determined according to the arc characteristics of the S. The invention provides a method for extracting land characteristic lines by utilizing contour line data, which is characterized in that on the basis of extracting land characteristic points, the characteristics of groove/ridge points are identified by three schemes, clustering operation is carried out on the groove/ridge points according to distance conditions, and finally all the groove/ridge points are simulated by utilizing a Bezier curve to obtain the groove/ridge lines. The invention provides application of two methods in weather map and topographic map analysis and a weather map analysis method. The method can simultaneously identify the groove points and the ridge points and generate the groove lines and the ridge lines, the algorithm efficiency is high, the result is accurate, and the obtained groove lines and ridge lines are non-crossed and attractive. |
| priorityDate | 2018-07-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 18.