CN103177650A - Simple digital map manufacturing method based on aerial photo - Google Patents

Simple digital map manufacturing method based on aerial photo Download PDF

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CN103177650A
CN103177650A CN2013101266506A CN201310126650A CN103177650A CN 103177650 A CN103177650 A CN 103177650A CN 2013101266506 A CN2013101266506 A CN 2013101266506A CN 201310126650 A CN201310126650 A CN 201310126650A CN 103177650 A CN103177650 A CN 103177650A
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longitude
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CN103177650B (en
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周从华
邢支虎
刘志锋
朱小龙
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ZHENJIANG FENGHUA INFORMATION TECHNOLOGY Co Ltd
Jiangsu University
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Jiangsu University
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Abstract

本发明公开了一种基于航拍图的简易数字地图制作方法，包括以下步骤：为局部地区的航拍图建立坐标体系；标识出图中每一栋建筑物的坐标；与实际的经纬度建立转换方法；建立相隔单位距离的两点的经纬度之间的关系；利用这种关系建立相隔距离不超过

Figure DEST_PATH_IMAGE002
米的两点之间的约束条件，所有使得该条件为真的点均距离中心点不超过米。本发明面向普通用户，无需掌握专业知识和专用工具，对专业性要求低；制作过程可完全计算机实现，手工工作量低，制作成本低；可详细显示实景当中的所有物体，而不仅仅是河流，桥梁等标志性物体。本发明可广泛应用于基于位置的服务系统，亦可与电子政务相结合，通过标识物体的详细信息，直接服务于政府管理和决策分析。The invention discloses a method for making a simple digital map based on an aerial photograph, which comprises the following steps: establishing a coordinate system for the aerial photograph of a local area; marking the coordinates of each building in the diagram; and establishing a conversion method with the actual latitude and longitude; Establishes a relationship between the latitude and longitude of two points separated by a unit distance; uses this relationship to establish a distance not greater than
Figure DEST_PATH_IMAGE002
A constraint condition between two points in meters, all points that make this condition true are no more than rice. The present invention is oriented to ordinary users, does not need to master professional knowledge and special tools, and has low professional requirements; the production process can be completely realized by computer, with low manual workload and low production cost; it can display all objects in the real scene in detail, not just rivers , bridges and other iconic objects. The invention can be widely applied to location-based service systems, and can also be combined with e-government affairs to directly serve government management and decision-making analysis by identifying detailed information of objects.

Description

一种基于航拍图的简易数字地图制作方法A Simple Digital Map Making Method Based on Aerial Photographs

技术领域    technical field

本发明属于地理信息系统技术领域，涉及以航拍图为对象的数字地图制作方法。 The invention belongs to the technical field of geographic information systems, and relates to a method for making digital maps with aerial photographs as objects.

背景技术 Background technique

数字地图是通过数字化的方法，把城市地理信息以计算机可识别的格式存储起来，并能以连续地图的形式呈现出来，本质上是一个城市地理数据库。 A digital map stores urban geographic information in a computer-recognizable format through digitization and presents it in the form of a continuous map. It is essentially an urban geographic database.

数字地图为人们的生活带来了极大的便利，可提供丰富的基于位置的服务，如查找各种位置，各种场所，查找出行路线。数字地图与电子商务系统相结合，可动态显示连锁店位置、配送目的地分布，计算最短路径，优化配送方案，实现优化管理等等。与GPS相结合，可实时监控移动物体及车辆运行情况，实现远程管理。与电子政务相结合，可广泛应用于能源、交通、农林、土地、城建、旅游和军事等各个领域，直接服务于政府管理和决策分析，为国经济建设和社会发展提供支撑。 Digital maps have brought great convenience to people's lives, and can provide a wealth of location-based services, such as finding various locations, various places, and finding travel routes. The combination of digital map and e-commerce system can dynamically display the location of chain stores, the distribution of delivery destinations, calculate the shortest path, optimize the delivery plan, and realize optimized management, etc. Combined with GPS, it can monitor moving objects and vehicle operation in real time, and realize remote management. Combined with e-government, it can be widely used in various fields such as energy, transportation, agriculture, forestry, land, urban construction, tourism, and military affairs, directly serving government management and decision-making analysis, and providing support for national economic construction and social development.

然而数字地图的制作是很困难的，在知识上需要掌握空间变换类型、几何变换算法、矢量与栅格数据模型特点、数字地图数据结构等知识，在制作流程上需要经过八步：图像几何矫正、数字化地图、地图数据拓扑处理、数据转换、地图配色处理、添加地图标注、使用GPS控制点对地图进行验证、对地图进行重新矫正，在软件使用上需要涉及到AutoCAD、MapInfo、ArcInfo、PhotoShop、ErDas Imagine等等。这么多的知识点、制作流程和软件的使用使得地图的制作不仅专业性很高，而且成本也很高。 However, the production of digital maps is very difficult. In terms of knowledge, it is necessary to master the knowledge of spatial transformation types, geometric transformation algorithms, characteristics of vector and raster data models, and digital map data structures. Eight steps are required in the production process: image geometric correction , digital map, map data topology processing, data conversion, map color processing, adding map annotations, using GPS control points to verify the map, and re-correcting the map. The software needs to involve AutoCAD, MapInfo, ArcInfo, PhotoShop, ErDas Imagine and more. The use of so many knowledge points, production processes and software makes the production of maps not only highly professional, but also very costly.

    除了对专业性和制作成本有很高的要求，数字地图制作的很多工作需要手工完成，因此工作量非常巨大，这造成目前用户使用的数字地图除了河流，桥梁等必须标出的物体外，很少涉及居民楼等非典型建筑物体的标识，从而使得数字地图可容纳的信息很少。现有数字地图制作技术存在的专业性强，制作成本高，手工工作量大等缺陷。 In addition to the high requirements on professionalism and production cost, many works of digital map production need to be done manually, so the workload is very huge. The identification of atypical building objects such as residential buildings is seldom involved, so that the digital map can hold very little information. Existing digital map production technology has defects such as strong specialization, high production cost, and heavy manual workload.

发明内容 Contents of the invention

本发明提供了一种基于航拍图的简易数字地图制作方法，以达到能面向普通用户、且计算机易实现，并能详细显示实景当中的所有物体，而不仅仅是河流，桥梁等标志性物体等目的。 The invention provides a simple digital map production method based on aerial photographs, so as to be oriented to ordinary users, easy to realize by computer, and to display all objects in the real scene in detail, not just landmark objects such as rivers and bridges, etc. Purpose.

为了解决以上技术问题，本发明采用以下具体技术方案。 In order to solve the above technical problems, the present invention adopts the following specific technical solutions.

步骤1，为局部地区的航拍图建立坐标体系。 Step 1, establish a coordinate system for the aerial image of the local area.

航拍图均以矩形形式提供，以图片左上角为原点，东西走向为                                                

Figure 2013101266506100002DEST_PATH_IMAGE001
轴，南北走向为
Figure 664984DEST_PATH_IMAGE002
轴。设图片的大小为，像素大小为
Figure 260307DEST_PATH_IMAGE004
，图片中每个点的横向坐标设置为该点在
Figure 57362DEST_PATH_IMAGE001
轴上距原点的距离除以
Figure 2013101266506100002DEST_PATH_IMAGE005
，再乘以
Figure 603881DEST_PATH_IMAGE006
，图片中每个点的纵向坐标设置为该点在轴上距原点的距离除以
Figure 2013101266506100002DEST_PATH_IMAGE007
，再乘以
Figure 725738DEST_PATH_IMAGE008
。假设该点在轴上距原点的距离为
Figure 2013101266506100002DEST_PATH_IMAGE009
，则该点的横向坐标为
Figure 727509DEST_PATH_IMAGE010
，该点在
Figure 173534DEST_PATH_IMAGE002
轴上距原点的距离为，则该点的横向坐标为
Figure 740519DEST_PATH_IMAGE012
。 Aerial images are provided in the form of rectangles, with the upper left corner of the image as the origin, and the east-west direction as
Figure 2013101266506100002DEST_PATH_IMAGE001
Axis, north-south direction is
Figure 664984DEST_PATH_IMAGE002
axis. Let the image size be , with a pixel size of
Figure 260307DEST_PATH_IMAGE004
, the horizontal coordinates of each point in the picture are set to the point at
Figure 57362DEST_PATH_IMAGE001
The distance on the axis from the origin divided by
Figure 2013101266506100002DEST_PATH_IMAGE005
, and multiply by
Figure 603881DEST_PATH_IMAGE006
, the vertical coordinates of each point in the picture are set to the point at The distance on the axis from the origin divided by
Figure 2013101266506100002DEST_PATH_IMAGE007
, and multiply by
Figure 725738DEST_PATH_IMAGE008
. Suppose the point is at The distance from the origin on the axis is
Figure 2013101266506100002DEST_PATH_IMAGE009
, then the horizontal coordinates of the point are
Figure 727509DEST_PATH_IMAGE010
, the point at
Figure 173534DEST_PATH_IMAGE002
The distance from the origin on the axis is , then the horizontal coordinates of the point are
Figure 740519DEST_PATH_IMAGE012
.

步骤2，标识出图中每一栋建筑物的坐标。 Step 2, identify the coordinates of each building in the figure.

在建筑物上随机选择一个点，将该点的坐标作为该建筑物的坐标。 Randomly select a point on the building, and use the coordinates of the point as the coordinates of the building.

步骤3，与实际的经纬度建立转换方法。 Step 3, establish conversion method with actual latitude and longitude.

随机选取两个建筑物，记为A和B。在为航拍图建立的坐标体系中获取A，B的坐标，分别 Randomly select two buildings, denoted as A and B. Obtain the coordinates of A and B in the coordinate system established for the aerial image, respectively

记为，

Figure 817059DEST_PATH_IMAGE014
。利用移动设备的GPS定位功能分别获取A，B的经纬度，记为，。 recorded as ,
Figure 817059DEST_PATH_IMAGE014
. Use the GPS positioning function of the mobile device to obtain the latitude and longitude of A and B respectively, recorded as , .

在两套坐标体系中只存在缩放和平移，令

Figure 2013101266506100002DEST_PATH_IMAGE017
表示
Figure 587886DEST_PATH_IMAGE001
轴的缩放比例，
Figure 573160DEST_PATH_IMAGE018
表示横坐标的平移，设置方程组
Figure 2013101266506100002DEST_PATH_IMAGE019
并求解出
Figure 820602DEST_PATH_IMAGE020
，
Figure 2013101266506100002DEST_PATH_IMAGE021
作为转换参数。令
Figure 324614DEST_PATH_IMAGE022
表示
Figure 378021DEST_PATH_IMAGE002
轴的缩放比例，表示横坐标的平移，设置方程组
Figure 155484DEST_PATH_IMAGE024
并求解出
Figure 2013101266506100002DEST_PATH_IMAGE025
，
Figure 636144DEST_PATH_IMAGE026
作为转换参数。 There are only zooming and translation in the two sets of coordinate systems, so that
Figure 2013101266506100002DEST_PATH_IMAGE017
express
Figure 587886DEST_PATH_IMAGE001
axis scaling,
Figure 573160DEST_PATH_IMAGE018
Indicates the translation of the abscissa, setting the equation system
Figure 2013101266506100002DEST_PATH_IMAGE019
and solve for
Figure 820602DEST_PATH_IMAGE020
,
Figure 2013101266506100002DEST_PATH_IMAGE021
as conversion parameters. make
Figure 324614DEST_PATH_IMAGE022
express
Figure 378021DEST_PATH_IMAGE002
axis scaling, Indicates the translation of the abscissa, setting the equation system
Figure 155484DEST_PATH_IMAGE024
and solve for
Figure 2013101266506100002DEST_PATH_IMAGE025
,
Figure 636144DEST_PATH_IMAGE026
as conversion parameters.

步骤4，建立相隔单位距离的两点的经纬度之间的关系。 Step 4, establishing the relationship between the latitude and longitude of two points separated by a unit distance.

在实景中随机选择距离不超过1000米的三个点，记为C、D、E，利用移动设备自带的GPS定位功能分别获取这些点的经纬度，记为

Figure 2013101266506100002DEST_PATH_IMAGE027
，，
Figure 2013101266506100002DEST_PATH_IMAGE029
。  Randomly select three points with a distance of no more than 1000 meters in the real scene, denoted as C, D, E, and use the GPS positioning function of the mobile device to obtain the latitude and longitude of these points respectively, denoted as
Figure 2013101266506100002DEST_PATH_IMAGE027
, ,
Figure 2013101266506100002DEST_PATH_IMAGE029
.

计算C与D之间经纬度的差异与距离之间的比值：

Figure 661049DEST_PATH_IMAGE030
，这里
Figure 2013101266506100002DEST_PATH_IMAGE031
表示C与D之间的距离，单位为米。 Calculate the ratio of the difference in latitude and longitude between C and D to the distance:
Figure 661049DEST_PATH_IMAGE030
,here
Figure 2013101266506100002DEST_PATH_IMAGE031
Indicates the distance between C and D in meters.

计算C与E之间经纬度的差异与距离之间的比值：

Figure 355335DEST_PATH_IMAGE032
，这里
Figure 2013101266506100002DEST_PATH_IMAGE033
表示C与E之间的距离，单位为米。 Calculate the ratio of the difference in latitude and longitude between C and E to the distance:
Figure 355335DEST_PATH_IMAGE032
,here
Figure 2013101266506100002DEST_PATH_IMAGE033
Indicates the distance between C and E in meters.

计算D与E之间经纬度的差异与距离之间的比值：

Figure 443115DEST_PATH_IMAGE034
，这里表示D与E之间的距离，单位为米。 Calculate the ratio of the difference in latitude and longitude between D and E to the distance:
Figure 443115DEST_PATH_IMAGE034
,here Indicates the distance between D and E in meters.

相隔单位距离的两点的经纬度之间的关系为：

Figure 426114DEST_PATH_IMAGE036
。 The relationship between the latitude and longitude of two points separated by a unit distance is:
Figure 426114DEST_PATH_IMAGE036
.

步骤5， 定位，搜索出周围米范围内的所有建筑 Step 5, locate, search out the surrounding All buildings within meters

设在当前位置利用移动设备自带的GPS定位功能获得的经纬度为

Figure 759007DEST_PATH_IMAGE038
，在为航拍图所建的坐标体系中，对于任意的建筑物的坐标
Figure 2013101266506100002DEST_PATH_IMAGE039
，如果
Figure 307800DEST_PATH_IMAGE040
，则标识该建筑物距离当前位置不足
Figure 333525DEST_PATH_IMAGE037
米。 The latitude and longitude obtained by using the GPS positioning function of the mobile device at the current location is
Figure 759007DEST_PATH_IMAGE038
, in the coordinate system built for aerial images, for any building coordinates
Figure 2013101266506100002DEST_PATH_IMAGE039
,if
Figure 307800DEST_PATH_IMAGE040
, it indicates that the building is not far enough from the current location
Figure 333525DEST_PATH_IMAGE037
rice.

有益效果：1）本发明的数字地图制作技术面向普通用户，无需掌握专业知识和专用工具，对专业性要求很低；2）制作过程可完全计算机实现，手工工作量低，制作成本低；3）可详细显示实景当中的所有物体，而不仅仅是河流，桥梁等标志性物体。 Beneficial effects : 1) The digital map production technology of the present invention is oriented to ordinary users, without the need to master professional knowledge and special tools, and has very low requirements for professionalism; 2) The production process can be completely realized by computer, with low manual workload and low production cost; 3 ) can display all objects in the real scene in detail, not just iconic objects such as rivers and bridges.

具体实施方式 Detailed ways

下面结合实施例对本发明的技术方案做进一步详细说明。 The technical solution of the present invention will be further described in detail below in conjunction with the embodiments.

现有江苏省扬中市2011年底的航拍图。 There are aerial pictures of Yangzhong City, Jiangsu Province at the end of 2011.

1）为扬中市航拍图建立坐标体系。 1) Establish a coordinate system for the aerial image of Yangzhong City.

以江苏省扬中市2011年底的航拍图左上角为原点，东西走向为

Figure 600558DEST_PATH_IMAGE001
轴，南北走向为
Figure 533879DEST_PATH_IMAGE002
轴。图片的大小
Figure 2013101266506100002DEST_PATH_IMAGE041
，图片中每个点的横向坐标设置为该点在
Figure 641905DEST_PATH_IMAGE001
轴上距原点的距离除以4741500厘米（整个扬中市航拍图的宽度），再乘以11259，图片中每个点的纵向坐标设置为该点在
Figure 900849DEST_PATH_IMAGE002
轴上距原点的距离除以6088400厘米，即整个扬中市航拍图的长度，再乘以14534。 Taking the upper left corner of the aerial photo of Yangzhong City, Jiangsu Province at the end of 2011 as the origin, the east-west direction is
Figure 600558DEST_PATH_IMAGE001
Axis, north-south direction is
Figure 533879DEST_PATH_IMAGE002
axis. image size
Figure 2013101266506100002DEST_PATH_IMAGE041
, the horizontal coordinates of each point in the picture are set to the point at
Figure 641905DEST_PATH_IMAGE001
Divide the distance from the origin on the axis by 4741500 cm (the width of the entire aerial image of Yangzhong City), and multiply by 11259. The vertical coordinates of each point in the image are set to the point at
Figure 900849DEST_PATH_IMAGE002
Divide the distance from the origin on the axis by 6088400 cm, that is, the length of the aerial image of the entire Yangzhong City, and multiply by 14534.

2）标识出图中每一栋建筑物的坐标。 2) Identify the coordinates of each building in the picture.

现有扬中市三茅街道建设社区的航拍图，扬中市三茅街道建设社区的航拍图中标记两栋建筑物A和B，其坐标分别是（5012.50，-4084.25），（5006.50，-4117.75）。 There is an aerial photo of the construction community of Sanmao Street in Yangzhong City. In the aerial photo of the construction community of Sanmao Street in Yangzhong City, two buildings A and B are marked, and their coordinates are (5012.50, -4084.25), (5006.50, -4117.75) .

3）与实际的经纬度建立转换方法。 3) Establish conversion method with actual latitude and longitude.

对于扬中市三茅街道建设社区的航拍图中标记的建筑物A和B，利用移动设备自带的GPS定位功能分别获取A，B的经纬度，分别是(119.81486798, 32.23674003)，（119.81470613，32.23598230）。 For the buildings A and B marked in the aerial photograph of the construction community in Sanmao Street, Yangzhong City, use the GPS positioning function of the mobile device to obtain the latitude and longitude of A and B, respectively (119.81486798, 32.23674003), (119.81470613, 32.23598230) .

建立方程组

Figure 327282DEST_PATH_IMAGE042
，解出
Figure 329873DEST_PATH_IMAGE001
轴的缩放比例
Figure 2013101266506100002DEST_PATH_IMAGE043
，横坐标平移参数
Figure 790941DEST_PATH_IMAGE044
。 build equations
Figure 327282DEST_PATH_IMAGE042
,solve
Figure 329873DEST_PATH_IMAGE001
scaling of axes
Figure 2013101266506100002DEST_PATH_IMAGE043
, the abscissa translation parameter
Figure 790941DEST_PATH_IMAGE044
.

建立方程组

Figure 2013101266506100002DEST_PATH_IMAGE045
，解出
Figure 955206DEST_PATH_IMAGE002
轴的缩放比例
Figure 134515DEST_PATH_IMAGE046
，纵坐标平移参数
Figure 2013101266506100002DEST_PATH_IMAGE047
。 build equations
Figure 2013101266506100002DEST_PATH_IMAGE045
,solve
Figure 955206DEST_PATH_IMAGE002
scaling of axes
Figure 134515DEST_PATH_IMAGE046
, the ordinate translation parameter
Figure 2013101266506100002DEST_PATH_IMAGE047
.

步骤4，建立相隔单位距离的两点的经纬度之间的关系。 Step 4, establishing the relationship between the latitude and longitude of two points separated by a unit distance.

在实景中随机选择三个点，记为C、D、E，利用移动设备自带的GPS定位功能分别获取这些点的经纬度，分别是 (119.84486513, 32.21314854)， (119.85382112, 32.21473186)，(119.85463039, 32.20812715)。 Randomly select three points in the real scene, denoted as C, D, E, and use the GPS positioning function of the mobile device to obtain the latitude and longitude of these points, respectively (119.84486513, 32.21314854), (119.85382112, 32.21473186), (119.85463039, 32.20812715).

计算C与D之间经纬度的差异与距离之间的比值：。 Calculate the ratio of the difference in latitude and longitude between C and D to the distance: .

计算C与E之间经纬度的差异与距离之间的比值：

Figure 2013101266506100002DEST_PATH_IMAGE049
。 Calculate the ratio of the difference in latitude and longitude between C and E to the distance:
Figure 2013101266506100002DEST_PATH_IMAGE049
.

计算D与E之间经纬度的差异与距离之间的比值：

Figure 427011DEST_PATH_IMAGE050
。 Calculate the ratio of the difference in latitude and longitude between D and E to the distance:
Figure 427011DEST_PATH_IMAGE050
.

相隔单位距离的两点的经纬度之间的关系为：

Figure 2013101266506100002DEST_PATH_IMAGE051
。 The relationship between the latitude and longitude of two points separated by a unit distance is:
Figure 2013101266506100002DEST_PATH_IMAGE051
.

步骤5， 定位，搜索出周围

Figure 965439DEST_PATH_IMAGE037
米范围内的所有建筑 Step 5, locate, search out the surrounding
Figure 965439DEST_PATH_IMAGE037
All buildings within meters

设在当前位置利用手机自带的GPS定位功能获得的经纬度

Figure 428782DEST_PATH_IMAGE038
，在为航拍图所建的坐标体系中，对于任意的建筑物的坐标
Figure 773175DEST_PATH_IMAGE039
，如果，则标识该建筑物距离当前位置不足
Figure 714904DEST_PATH_IMAGE037
米。 Set the latitude and longitude obtained by using the GPS positioning function of the mobile phone at the current location
Figure 428782DEST_PATH_IMAGE038
, in the coordinate system built for aerial images, for any building coordinates
Figure 773175DEST_PATH_IMAGE039
,if , it indicates that the building is not far enough from the current location
Figure 714904DEST_PATH_IMAGE037
rice.

Claims (4)

1. simple and easy numerical map method for making based on the figure that takes photo by plane is characterized in that comprising the following steps:
Step 1 is for the figure that takes photo by plane in some areas sets up coordinate-system;
Step 2, the coordinate of each solitary building during sign is published picture;
Step 3 is set up conversion method with the longitude and latitude of reality;
Step 4 is set up the relation between the longitude and latitude of 2 of the unit distance of being separated by;
Step 5, the location is around searching out
Figure 968293DEST_PATH_IMAGE001
All buildings in the rice scope.
2. simple and easy numerical map method for making based on the figure that takes photo by plane as claimed in claim 1 is characterized in that described step 1 further is specially:
Figure 328867DEST_PATH_IMAGE002
Take the figure upper left corner of taking photo by plane as initial point, east-westly be
Figure 715986DEST_PATH_IMAGE003
Axle, south-north direction is
Figure 23471DEST_PATH_IMAGE004
Axle;
If the size of picture is
Figure 711121DEST_PATH_IMAGE006
, pixel size is
Figure 257640DEST_PATH_IMAGE007
, in picture, the lateral coordinates of each point is set to this point and exists
Figure 368815DEST_PATH_IMAGE003
On axle apart from the distance of initial point divided by
Figure 379497DEST_PATH_IMAGE008
, then multiply by
Figure 347453DEST_PATH_IMAGE009
, in picture, the along slope coordinate of each point is set to this point and exists
Figure 876873DEST_PATH_IMAGE004
On axle apart from the distance of initial point divided by
Figure 588477DEST_PATH_IMAGE010
, then multiply by
Figure 453665DEST_PATH_IMAGE011
Suppose that this point exists
Figure 592523DEST_PATH_IMAGE003
Distance apart from initial point on axle is
Figure 113634DEST_PATH_IMAGE012
, the lateral coordinates of this point is
Figure 363349DEST_PATH_IMAGE013
, this point
Figure 348623DEST_PATH_IMAGE004
Distance apart from initial point on axle is , the lateral coordinates of this point is
Figure 666789DEST_PATH_IMAGE015
3. simple and easy numerical map method for making based on the figure that takes photo by plane as described in claim 1 is characterized in that described step 3 further is specially:
Figure 720196DEST_PATH_IMAGE002
Choose at random two buildingss, be designated as A and B;
Obtain A in the coordinate-system of setting up for the figure that takes photo by plane, the coordinate of B, minute
Be not designated as
Figure 497659DEST_PATH_IMAGE016
,
Figure 978319DEST_PATH_IMAGE017
Utilize the GPS positioning function that mobile device carries to obtain respectively A, the longitude and latitude of B is designated as
Figure 270760DEST_PATH_IMAGE018
,
Figure 564075DEST_PATH_IMAGE019
Figure 258362DEST_PATH_IMAGE005
Order
Figure 909923DEST_PATH_IMAGE020
Expression
Figure 892923DEST_PATH_IMAGE003
The scaling of axle,
Figure 288132DEST_PATH_IMAGE021
The translation of expression horizontal ordinate arranges system of equations
Figure 836925DEST_PATH_IMAGE022
And solve ,
Figure 129683DEST_PATH_IMAGE024
As conversion parameter;
Figure 328583DEST_PATH_IMAGE025
Order
Figure 731883DEST_PATH_IMAGE026
Expression
Figure 928509DEST_PATH_IMAGE004
The scaling of axle, The translation of expression horizontal ordinate arranges system of equations
Figure 419850DEST_PATH_IMAGE028
And solve
Figure 382383DEST_PATH_IMAGE029
,
Figure 812228DEST_PATH_IMAGE030
As conversion parameter.
4. simple and easy numerical map method for making based on the figure that takes photo by plane as claimed in claim 1 is characterized in that described step 4 further is specially:
Figure 788274DEST_PATH_IMAGE002
Select three points at random in outdoor scene, be designated as respectively C, D, E, utilize GPS positioning function that mobile device carries to obtain respectively the longitude and latitude of described point, be designated as respectively
Figure 266660DEST_PATH_IMAGE031
,
Figure 910131DEST_PATH_IMAGE032
,
Figure 245297DEST_PATH_IMAGE033
;
2. calculate the difference of longitude and latitude between C and D and the ratio between distance:
Figure 911902DEST_PATH_IMAGE034
, described
Figure 990716DEST_PATH_IMAGE035
Distance between expression C and D, unit is rice;
3. calculate the difference of longitude and latitude between C and E and the ratio between distance:
Figure 488694DEST_PATH_IMAGE036
, described
Figure 994761DEST_PATH_IMAGE037
Distance between expression C and E, unit is rice;
4. calculate the difference of longitude and latitude between D and E and the ratio between distance: , described
Figure 31168DEST_PATH_IMAGE039
Distance between expression D and E, unit is rice;
Pass between the longitude and latitude of 2 of the unit distance of 5. being separated by is:
Figure 383651DEST_PATH_IMAGE040
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