CN1710554A - Method for presenting map information and method for transmitting map information data - Google Patents
Method for presenting map information and method for transmitting map information data Download PDFInfo
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- CN1710554A CN1710554A CN 200410040014 CN200410040014A CN1710554A CN 1710554 A CN1710554 A CN 1710554A CN 200410040014 CN200410040014 CN 200410040014 CN 200410040014 A CN200410040014 A CN 200410040014A CN 1710554 A CN1710554 A CN 1710554A
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Abstract
The invention for expressing point element in map information includes steps: determining central reference point, expressing object point by using difference between coordinate of object point and coordinate of central point. Advantages are: small data quantity, simple format convenient for mobile terminal to do calculation and operation. The method discards some functions not possible to be realized at mobile terminal. Compared with transmission quantity in general format, the transmission quantity of map data between mobile terminal and server in the disclosed simple format is lowered more than 2/3. Thus, transmission time is saved, transmission expense is lowered, and display time is improved.
Description
Technical field
The present invention relates to computer technology, particularly be used for mobile communications network information transmitted technology.
Background technology
Existing electronic chart form is for a long time at computing machine, and coverage can adapt to the whole world.As the mif file of typical electronic format map Mapinfo company, the SHP file structure of Russia ESRI company.Coordinate points in these forms is directly to represent with latitude and longitude coordinates, represents that like this result who causes is exactly that data volume is bigger.Lower for traffic rate, the higher mobile communication subscriber of communications cost is a very big waste.Also can make simultaneously mobile communication terminal when handling map datum, will consume a lot of times.It below is the example (literal after * number is explanation) of a face piece MIF file.Electronic chart one deck is by two representation of file: mif and mid.
Version 300 * MIF FileVersions
Charset " WindowsSimpChinese " * literal code
Delimiter ", " * list separator is,
CoordSys Earth Projection 1,0 * coordinate system
The word attribute that Columns 1 * is associated (leaving in the corresponding mid file)
NAME?Char(60)
Data * coordinate data
Zone of Region 1 *
12 * always have 12 formations
104.102577 30.713125 * coordinate points
104.102692?30.713181
104.102783?30.713181
104.102837?30.71315
10.4102837?30.713081
104.102814?30.712997
104.102692?30.712965
104.102661?30.71295
104.1026?30.712955
104.102562?30.713009
104.102562?30.713066
104.102577?30.713125
Pen (1,2,1369340) * draw this zone the pen number
The brush that Brush (2,1369340,1369340) * selects for use
Center 104.102699 30.713065 * center position
Another piece zone of Region 1 *
15
104.101364?30.711365
104.101486?30.711372
104.101624?30.711422
104.101685?30.711348
104.101723?30.711197
104.1017?30.711016
104.101997?30.71084
104.10218?30.710716
104.102158?30.710674
104.101753?30.710653
104.10144?30.71064
104.101196?30.710756
104.101128?30.710966
104.101074?30.711348
104.101364?30.711365
Pen(1，2，1369340)
Brush(2，1369340，1369340)
Center?104.101627?30.711031
The mid file
First regional title of the corresponding mif file of " Shahe " *
The title in second zone of the corresponding mif file of " Fu He " *
The mif file layout is very complete as can be seen, but also very loaded down with trivial details, because the arithmetic capability and the display capabilities of portable terminal are all limited, such form also is not suitable for portable terminal.
Summary of the invention
Technical matters to be solved by this invention is, provides that a kind of data volume is little, the simple cartographic information expression method of form.
The present invention solve the technical problem the technical scheme that is adopted, and a kind of method that shows cartographic information is provided, and a statement point element may further comprise the steps at least: determine the center reference point, explain impact point with the coordinate and the difference of the coordinate of central point of impact point.
Further comprising the steps of: the title that marks described impact point.
The method that the present invention explains line element may further comprise the steps at least:
Determine the center reference point, explain first impact point with the difference of the coordinate of the coordinate of first impact point and central point;
Difference with the coordinate of the coordinate of second impact point and first impact point is explained second impact point,
......
Difference with the coordinate of the coordinate of N impact point and (N-1) impact point is explained the N impact point,
Connect first, second .... (N-1), N impact point constitute line element.
Above-mentioned being connected to connects first, second in turn .... (N-1), N impact point constitute line element.Further comprising the steps of: the title that marks described line element.
The present invention explains surface element according to following steps:
Determine the center reference point, explain first impact point with the difference of the coordinate of the coordinate of first impact point and central point;
Difference with the coordinate of the coordinate of second impact point and first impact point is explained second impact point,
......
Difference with the coordinate of the coordinate of N impact point and (N-1) impact point is explained the N impact point,
Connect first, second .... (N-1), N impact point, constitute closed curve, the zone in the closed curve is surface element.Described being connected in turn connects.Also mark the title of described surface element.
The present invention also provides a kind of method of transmitting the cartographic information data, in the data packets for transmission, contains one of following at least: with the some element of relative coordinate statement; The line element that the impact point of explaining with relative coordinate constitutes; The surface element that the impact point of explaining with relative coordinate constitutes.The type identification and the title that also have map element in the data packets for transmission are in client figure element information reduction over the ground.Described " relative coordinate " promptly is absolute coordinates (longitude and latitude) poor of a point and another point, for example, A point geographic coordinate be (a1, b1), the B point be (a2, b2), then relative coordinate be (a2-a1, b2-b1).
The invention has the beneficial effects as follows that data volume is little, same map will be represented with less bit.Simple on the form, be convenient to computing and operation on portable terminal.Abandon some and on portable terminal, can't realize function.Can realize the demonstration of all city maps.Portable terminal is using electronic chart that a lot of limitation are arranged.Because the restriction of its storage capacity, electronic map data can not leave in the terminal.Have only the employing C/S model, map datum is placed on the server, portable terminal goes visit.So just between portable terminal and server, need to carry out the transmission of map datum, adopt after this data layout, data quantity transmitted is littler more than 2/3 than general format, saved the transmission time greatly, because the mobile data charge is all chargeed according to data traffic, this also greatly reduces the expense of transmission simultaneously.The reduction of data volume has also improved the demonstration time of map on mobile communication terminal.
The present invention is further illustrated below in conjunction with specification drawings and specific embodiments.
Description of drawings
Fig. 1 is the process flow diagram of one embodiment of the invention.
Embodiment
At first, map elements is summed up as three classes: point, line, surface.No longer divide single line or these attributes of two-wire in online, all be referred to irregular single line; Face is also no longer distinguished quadrilateral ellipse and irregular area, all is referred to the disposal route of irregular area.Confirm a centre coordinate point when visiting map, be initial point with this centre coordinate point at every turn, is relative coordinate with other coordinate conversion.And for line or face, be starting point with first point again, deduct last point coordinate value with back one point coordinate, as any coordinate of back.Can significantly reduce data volume like this, owing to have only the relative coordinate value in the downlink data, strengthen the confidentiality of data greatly simultaneously.And when client shows, be to be indifferent to the longitude and latitude absolute coordinates, and only need relative coordinate just can reproduce map.
The present invention adopts following method to explain some element in the cartographic information: determine the center reference point, with the difference statement impact point of the coordinate of the coordinate of impact point and central point, and mark the title of described impact point.As: the latitude and longitude coordinates of center reference point be (a, b), the coordinate of impact point be (a+x, b+y), then under the situation that the center reference point is determined, so that (x y) can explain the position of this impact point, attached title with this point.
As shown in Figure 1, the present invention adopts following method to explain line element in the cartographic information: determine the center reference point, difference with the coordinate of the coordinate of first impact point and central point is explained first impact point, difference with the coordinate of the coordinate of second impact point and first impact point is explained second impact point, difference with the coordinate of the coordinate of the 3rd impact point and second impact point is explained the 3rd impact point .... impact point to the last, and mark the title of described line element.As: the latitude and longitude coordinates of center reference point is (a, b), the coordinate of first impact point is (a+x1, b+y1), the coordinate of second impact point is (a+x1+x2, b+y1+y2), then so that (x2 y2) can explain the position of second impact point, the coordinate of the 3rd impact point is (a+x1+x2+x3, b+y1+y2+y3), then so that (x3 y3) can explain the position of the 3rd impact point, by that analogy, connect each point at last and constitute a line, information such as attached title with this line element, color promptly constitute complete line element.Surface element in like manner, the zone in the closed curve promptly constitutes surface element.
The cartographic information of the method according to this invention record becomes a kind of new record format, in a packets of information, comprises information such as element type code, position, color, title, and described position promptly is the position relation according to the method statement of this method.
The method of transmission cartographic information data of the present invention also has the type identification and the title of map element in the data packets for transmission, in client figure element information reduction over the ground.Described " reduction " is that the method according to this invention is carried out backstepping, the information in the packet handled, and shown with the form of map.With the line element is example, and according to the parameter of the coordinate and first impact point of center reference point, for example the relative coordinate of center reference point is drawn first impact point relatively, draws second impact point according to the parameter of second impact point ... connect each point at last.
Adopt method statement cartographic information of the present invention, produced new form, further explain the formation of form of the present invention below with embodiment.
If center point coordinate is (3071300,10410200)
A, some element: 10,0,0,0,1 ,-1335,530, " Chengdu XXX "tibco software, inc." "TIBCO Software
Below above-mentioned project is explained:
10 is the element type code, represents that this key element is a little;
The numerical value of the color red, green, blue of 0,0,0 this key element of expression;
-1335,530 these relative coordinates of expression with respect to the center, promptly this latitude and longitude coordinates and center point coordinate is poor;
" XXX "tibco software, inc." "TIBCO Software in Chengdu is the title of this point.
B, line element:
Comprise following content in the packets of information:
20,144,144,255,1,105,0,2,6 ,-1669 ,-5890, " people South Road "
Wherein,
20 is the element type code, represents that this key element is a line;
The color of 144,144,255 these key elements of expression is the numerical value of RGB;
1 expression type is as railway, highway or the like;
105,0 is standby;
The display width of 2 expression lines;
7 these key elements of expression are made of 7 points altogether;
-1669 starting points are with respect to the latitude of central point;
-5890 starting points are with respect to the longitude of central point;
The title of " people South Road " expression key element is uneven in length.
C, surface element
30,20,228,252,1,0,12,12,58, " Shahe "
Wherein:
30 these key elements of expression are face;
The color of 20,228,252 these key elements of expression is the numerical value of RGB;
The characteristic attribute of 1 expression key element is as greenery patches, river, park or the like;
0 is standby;
12 these key elements of expression are made of 12 points altogether;
12 starting points are with respect to the latitude of central point;
58 starting points are with respect to the longitude of central point;
The title of " Shahe " expression key element is uneven in length.
The position of cartographic information of the present invention in server represent with longitude and latitude, during download with the method representation of the aforementioned information of figure expressively.
The line element of this paper and surface element all are to be formed by connecting by a plurality of discrete points, described herein " first, second .... " and the difference of the order that connects of each point be not essential distinction, that is to say, even with " first point, thirdly, second point ... " etc. be linked in sequence, its difference also only be the statement difference.The present invention explains second point with second difference with first, thirdly to explain thirdly with second difference, explain the 4th point with the 4th with difference thirdly .... only be for the ease of understanding, obvious, also can explain the 4th point with the 4th with second difference thirdly to explain thirdly with first difference, or the like, all be to follow default rule, this type of difference is unsubstantiality difference also, should be considered as within the interest field of the present invention.
Claims (10)
1, the method for performance cartographic information is characterized in that, a statement point element may further comprise the steps at least: determine the center reference point, explain impact point with the coordinate and the difference of the coordinate of central point of impact point.
2, the method for performance cartographic information as claimed in claim 1 is characterized in that, and is further comprising the steps of: the title that marks described impact point.
3, the method for performance cartographic information is characterized in that, the statement line element may further comprise the steps at least:
Determine the center reference point, explain first impact point with the difference of the coordinate of the coordinate of first impact point and central point;
Difference with the coordinate of the coordinate of second impact point and first impact point is explained second impact point,
……
Difference with the coordinate of the coordinate of N impact point and (N-1) impact point is explained the N impact point,
Connect first, second .... (N-1), N impact point constitute line element.
4, the method for performance cartographic information as claimed in claim 2 is characterized in that, connects first, second in turn .... (N-1), N impact point constitute line element.
5, as the method for claim 3 or 4 described performance cartographic informations, it is characterized in that, further comprising the steps of: the title that marks described line element.
6, the method for performance cartographic information is characterized in that, explains surface element according to following steps:
Determine the center reference point, explain first impact point with the difference of the coordinate of the coordinate of first impact point and central point;
Difference with the coordinate of the coordinate of second impact point and first impact point is explained second impact point,
……
Difference with the coordinate of the coordinate of N impact point and (N-1) impact point is explained the N impact point,
Connect first, second .... (N-1), N impact point, constitute closed curve, the zone in the closed curve is surface element.
7, the method for performance cartographic information as claimed in claim 6 is characterized in that, connects first, second in turn .... (N-1), N, first impact point constitute surface element.
8, as the method for claim 6 or 7 described performance cartographic informations, it is characterized in that, also mark the title of described surface element.
9, the method for transmission cartographic information data is characterized in that, in the data packets for transmission, contains one of following at least:
Some element with the relative coordinate statement;
The line element that the impact point of explaining with relative coordinate constitutes;
The surface element that the impact point of explaining with relative coordinate constitutes.
10, the method for transmission cartographic information data as claimed in claim 9 is characterized in that, also has the type identification and the title of map element in the data packets for transmission, in client figure element information reduction over the ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410040014 CN1710554A (en) | 2004-06-17 | 2004-06-17 | Method for presenting map information and method for transmitting map information data |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410040014 CN1710554A (en) | 2004-06-17 | 2004-06-17 | Method for presenting map information and method for transmitting map information data |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1710554A true CN1710554A (en) | 2005-12-21 |
Family
ID=35706797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410040014 Pending CN1710554A (en) | 2004-06-17 | 2004-06-17 | Method for presenting map information and method for transmitting map information data |
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| Country | Link |
|---|---|
| CN (1) | CN1710554A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101211332B (en) * | 2006-12-26 | 2010-08-11 | 富士施乐株式会社 | Installation location management system |
| CN102252685A (en) * | 2010-05-21 | 2011-11-23 | 科菱航睿空间信息技术有限公司 | Navigation electronic map data processing method and storage method based on same |
| CN104321619B (en) * | 2012-03-16 | 2016-08-17 | 观致汽车有限公司 | Locally map rejuvenation |
| CN109299311A (en) * | 2018-09-18 | 2019-02-01 | 甘肃启远智能科技有限责任公司 | Photovoltaic module longitude and latitude data configuration method and device |
| CN110084877A (en) * | 2011-09-26 | 2019-08-02 | 谷歌有限责任公司 | Map element is managed using aggregation features identifier |
-
2004
- 2004-06-17 CN CN 200410040014 patent/CN1710554A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101211332B (en) * | 2006-12-26 | 2010-08-11 | 富士施乐株式会社 | Installation location management system |
| CN102252685A (en) * | 2010-05-21 | 2011-11-23 | 科菱航睿空间信息技术有限公司 | Navigation electronic map data processing method and storage method based on same |
| CN110084877A (en) * | 2011-09-26 | 2019-08-02 | 谷歌有限责任公司 | Map element is managed using aggregation features identifier |
| CN104321619B (en) * | 2012-03-16 | 2016-08-17 | 观致汽车有限公司 | Locally map rejuvenation |
| CN109299311A (en) * | 2018-09-18 | 2019-02-01 | 甘肃启远智能科技有限责任公司 | Photovoltaic module longitude and latitude data configuration method and device |
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