CN102750715B - Method and system for drawing marine meteorological chart - Google Patents
Method and system for drawing marine meteorological chart Download PDFInfo
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Abstract
本发明公开一种海洋气象图的绘制方法及系统，通过建立网格密度精细的平板地图，引入数字高程模型，具体包括：根据数字高程模型的数据，将海平面拉低，在陆地面和海平面之间建立绘图层绘制气象图；或者，根据数字高程数据将海平面的所有像素点设置为完全透明，在海平面下方建立绘图层绘制气象图，使节目制作人员可以在绘图层绘图后直接应用便可达到只在海洋上作图的效果，且当背景陆地层和海洋层变动时仍可使用，提高了制作效率，节省了节目制作时间，且通过调整绘图层的位置即可生成新的气象图，提高了气象图的复用率。
The invention discloses a method and system for drawing a marine meteorological map. By establishing a flat map with a fine grid density, a digital elevation model is introduced, which specifically includes: according to the data of the digital elevation model, the sea level is lowered, and the land surface and sea Create a drawing layer between the planes to draw a weather map; or, according to the digital elevation data, set all the pixels of the sea level to be completely transparent, and build a drawing layer below the sea level to draw a weather map, so that the program producers can directly draw on the drawing layer The application can achieve the effect of only drawing on the ocean, and it can still be used when the background land layer and ocean layer change, which improves production efficiency and saves program production time, and can generate new ones by adjusting the position of the drawing layer The weather map improves the reuse rate of the weather map.
Description
技术领域technical field
本发明涉及区域地图绘制领域，尤其涉及一种海洋气象图的绘制方法和系统。The invention relates to the field of regional map drawing, in particular to a method and system for drawing a marine meteorological map.
背景技术Background technique
气象图是用于分析大气物理状况和特性图表的统称。气象图也叫天气图。根据不同要求和目的而有多种类别。通常专指根据同一时刻测得的各地天气实况，用数值或符号按一定格式填在空白地图上，反映广大地区天气实况和形势的图。海洋气象图是用于分析海上大气无力状况和特性图表的图，专指根据同一时刻测得的天气实况，用数值或符号按照一定格式填在空白的海洋地图上。在天气预报的节目制作中，海浪预报、海浪预警、台风预警等各类海洋气候的预报，都需要海洋上绘制雨区、浪区、台风区等。因为是海洋预报，所以要求只在海洋上绘制，而陆地上则不出现任何的气象图。A weather map is a collective term for charts used to analyze the physical conditions and properties of the atmosphere. Weather maps are also called weather maps. There are many categories according to different requirements and purposes. Usually, it refers to a map that fills in a blank map with values or symbols in a certain format according to the actual weather conditions measured at the same time in various places, reflecting the actual weather conditions and situation in a wide area. A marine meteorological map is a map used to analyze the weak state of the sea atmosphere and a chart of characteristics. It refers to filling in a blank ocean map with numerical values or symbols according to a certain format based on the actual weather conditions measured at the same time. In the production of weather forecast programs, all kinds of marine climate forecasts such as wave forecasts, wave warnings, and typhoon warnings all need to map rain areas, wave areas, and typhoon areas on the ocean. Because it is a marine forecast, it is required to draw only on the ocean, and no weather map will appear on the land.
为了达到只在海洋上出现气象图的目的，现有技术中一般采用手动抠图的方法来实现，即首先在在地图上空绘制好雨区、浪区、台风区等，然后将覆盖到陆地部分的像素点设置为完全透明，这样就能达到只在海洋上出现气象图的效果。In order to achieve the purpose of only showing the weather map on the ocean, in the prior art, the method of manual map cutting is generally adopted, that is, firstly draw the rain area, wave area, typhoon area, etc. on the map, and then cover the land part The pixels of are set to be completely transparent, so that the effect of the weather map only appearing on the ocean can be achieved.
手动抠图本来就是一个非常繁琐的过程，且当背景地图运动后，就需要重新抠图。比如，雨区和浪区随时间的移动，以及台风的登录过程，都需将背景地图相对气象图进行移动，这样就会有重新覆盖陆地的区域，需要重新抠图。Manual cutout is a very cumbersome process, and when the background map moves, it needs to cut out again. For example, the movement of the rain area and wave area over time, as well as the typhoon registration process, all need to move the background map relative to the weather map, so that there will be areas that cover the land again, and the map needs to be re-cut.
可见现有技术存在以下问题：It can be seen that the prior art has the following problems:
(1)手动抠图过程非常繁琐；(1) The manual cutout process is very cumbersome;
(2)当背景地图移动后需要重新抠图。(2) When the background map is moved, it needs to be cut out again.
发明内容Contents of the invention
本发明实施例提供一种海洋气象图的绘制方法和系统，通过将绘图层放到陆地层下边实现对绘图层的覆盖，达到只在海洋上绘制气象图的效果，省去了手动抠图，且当背景地图变动的时候，不需要重新绘制。Embodiments of the present invention provide a method and system for drawing a marine meteorological map. By placing the drawing layer under the land layer to cover the drawing layer, the effect of only drawing a weather map on the ocean is achieved, eliminating the need for manual map extraction. And when the background map changes, there is no need to redraw it.
为了达到上述目的，本发明实施例一方面提供了一种海洋气象图的绘制方法，包括，通过地理投影方式建立网格密度精细的平板地图及引入数字高程模型，其特征在于，包括以下步骤：In order to achieve the above object, an embodiment of the present invention provides a method for drawing a marine meteorological map, including establishing a flat map with fine grid density and introducing a digital elevation model through geographic projection, characterized in that it includes the following steps:
根据所述数字高程模型的数据，将所述平板地图中的海平面拉低，生成新平板地图和新海平面；According to the data of the digital elevation model, the sea level in the flat map is lowered to generate a new flat map and a new sea level;
在所述新海平面所在平面与所述新平板地图的陆地所在平面之间，建立绘图层；Between the plane where the new sea level is located and the plane where the land of the new flat map is located, a drawing layer is established;
在所述绘图层上绘制气象图。Draw the weather map on the drawing layer.
本发明实施例另一方面提供了另一种海洋气象图的绘制方法，包括，通过地理投影方式建立网格密度精细的平板地图及引入数字高程模型，其特征在于，包括以下步骤：On the other hand, the embodiment of the present invention provides another method for drawing a marine meteorological map, including establishing a flat map with fine grid density and introducing a digital elevation model through geographic projection, characterized in that it includes the following steps:
根据所述数字高程模型的数据，将所述平板地图中的海平面设置为完全透明；According to the data of the digital elevation model, the sea level in the flat map is set to be completely transparent;
在所述平板地图中的海平面下方建立绘图层；establishing a drawing layer below sea level in said flat map;
在所述绘图层上绘制气象图。Draw the weather map on the drawing layer.
本发明实施例另一方面提供了一种海洋气象图的绘制系统，其特征在于，包括：On the other hand, the embodiments of the present invention provide a system for drawing a marine meteorological map, which is characterized in that it includes:
海平面拉低单元，用于根据所述数字高程模型的数据，将所述平板地图中的海平面拉低，生成新平板地图和新海平面；The sea level lowering unit is used to lower the sea level in the flat map to generate a new flat map and a new sea level according to the data of the digital elevation model;
绘图层生成单元，用于在所述新海平面所在平面与所述新平板地图的陆地所在平面之间，建立绘图层；A drawing layer generating unit, configured to establish a drawing layer between the plane where the new sea level is located and the plane where the land of the new flat map is located;
气象图绘制单元，用于在所述绘图层上绘制气象图。The weather map drawing unit is used to draw a weather map on the drawing layer.
本发明实施例另一方面提供了另一种海洋气象图的绘制系统，其特征在于，包括：On the other hand, the embodiments of the present invention provide another system for drawing marine meteorological maps, which is characterized in that it includes:
海平面抠像单元，用于根据所述数字高层模型的数据，将所述平板地图中的海平面设置为完全透明；The sea level matting unit is used to set the sea level in the flat map to be completely transparent according to the data of the digital high-level model;
绘图层生成单元，用于在所述平板地图中的海平面下方建立绘图层；a drawing layer generating unit, configured to establish a drawing layer below the sea level in the flat map;
气象图绘制单元，用于在所述绘图层上绘制气象图。The weather map drawing unit is used to draw a weather map on the drawing layer.
本发明实施例通过建立网格密度精细的平板地图及引入数字高程模型，将海平面拉低，在海平面和陆地面两个图层之间建立绘图层，或者将海平面抠像，在海平面以下建立绘图层，在绘图层上绘制气象图，使节目制作人员不用再对气象图进行手动抠图，且背景地图运动后可继续使用气象图，提高了节目制作效率，提高了气象图的复用性。In the embodiment of the present invention, the sea level is lowered by establishing a flat map with a fine grid density and introducing a digital elevation model, and a drawing layer is established between the sea level and the land surface, or the sea level is matted, and the sea level Create a drawing layer below the plane, and draw a weather map on the drawing layer, so that the program producers no longer need to manually cut out the weather map, and the weather map can continue to be used after the background map is moved, which improves the efficiency of program production and improves the accuracy of the weather map. Reusability.
附图说明Description of drawings
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.
图1是本发明实施例一中的一种海洋气象图的绘制方法的流程图；Fig. 1 is a flow chart of a method for drawing a marine meteorological map in Embodiment 1 of the present invention;
图2是本发明实施例二中的一种海洋气象图的绘制方法的流程图；Fig. 2 is a flow chart of a method for drawing a marine meteorological map in Embodiment 2 of the present invention;
图3是本发明实施例三中的一种海洋气象图的绘制系统的结构图；Fig. 3 is a structural diagram of a drawing system of a marine meteorological map in Embodiment 3 of the present invention;
图4是本发明实施例四中的一种海洋气象图的绘制系统的结构图。Fig. 4 is a structural diagram of a system for drawing a marine meteorological map in Embodiment 4 of the present invention.
具体实施方式detailed description
下面将结合本发明实施例中的附图，对本发明实施例的技术方案进行清楚、完整的描述，显然，所描述的实施例只是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例，都属于本发明保护的范围。The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
下面将结合本发明实施例中的附图，对本发明实施例的技术方案进行清楚、完整的描述，显然，所描述的实施例只是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例，都属于本发明保护的范围。The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
本发明实施例一提供了一种海洋气象图的绘制方法，如图1，包括以下步骤：Embodiment 1 of the present invention provides a kind of drawing method of marine meteorological map, as Fig. 1, comprises the following steps:
步骤101，根据数字高程模型的数据，将平板地图中的海平面拉低，生成新平板地图和新海平面；Step 101, according to the data of the digital elevation model, the sea level in the flat map is lowered to generate a new flat map and a new sea level;
识别海拔高度值小于零的像素点，在引入的数字高程模型(DEM)数据中，海洋的部分海拔高度值都小于零，本发明优选的，在顶点着色器(Shader)中判断，将海拔高度值小于零的顶点的海拔高度值拉低，优选的，将海平面的高度拉低10000米，生成新平板地图和新海平面。Identify the pixels whose altitude value is less than zero. In the imported digital elevation model (DEM) data, some altitude values of the ocean are all less than zero. Preferably, the present invention judges in the vertex shader (Shader), and the altitude The altitude value of the vertex whose value is less than zero is lowered, preferably, the height of the sea level is lowered by 10,000 meters to generate a new flat map and a new sea level.
步骤102，在新海平面所在平面与新平板地图的陆地所在平面之间，建立绘图层；Step 102, between the plane where the new sea level is located and the plane where the land of the new flat map is located, a drawing layer is established;
本发明优选的，在海拔高度为-5000的位置建立绘图层。Preferably in the present invention, the drawing layer is established at a position whose altitude is -5000.
步骤103，在所述绘图层上绘制气象图。Step 103, draw a weather map on the drawing layer.
本发明实施例一的技术方案带来的有益效果如下：The beneficial effects brought by the technical solution of Embodiment 1 of the present invention are as follows:
本发明实施例一通过建立网格密度精细的平板地图，引入DEM数据，根据DEM数据将海拔低于0的海平面拉低到10000米，并在其间海拔为-5000的位置建立绘图层，使节目制作人员可以在绘图层绘图后直接应用便可达到只在海洋上作图的效果，且当背景陆地层和海洋层变动时仍可使用，提高了制作效率，节省了节目制作时间，且通过调整绘图层的位置即可生成新的气象图，提高了气象图的复用率。Embodiment 1 of the present invention introduces DEM data by establishing a flat map with fine grid density, and lowers the sea level below 0 to 10,000 meters according to the DEM data, and establishes a drawing layer at a position with an altitude of -5000 in between, so that Program producers can directly apply the drawing layer to achieve the effect of only drawing on the ocean, and it can still be used when the background land layer and ocean layer change, which improves production efficiency and saves program production time. A new weather map can be generated by adjusting the position of the drawing layer, which improves the reuse rate of the weather map.
本发明实施例二提供了一种海洋气象图的绘制方法，包括以下步骤：Embodiment 2 of the present invention provides a kind of drawing method of marine meteorological map, comprises the following steps:
步骤201，根据数字高程模型的数据，将平板地图中的海平面设置为完全透明；Step 201, according to the data of the digital elevation model, the sea level in the flat map is set to be completely transparent;
识别所述平板地图中对应的数字高程模型中海拔高度值小于零的像素点，优选的，在像素shader中，判断像素点对应的海拔高度，将海拔高度值小于零的像素点的透明度设置为完全透明。Identify the pixel points whose altitude value is less than zero in the corresponding digital elevation model in the flat map, preferably, in the pixel shader, determine the altitude corresponding to the pixel point, and set the transparency of the pixel point whose altitude value is less than zero to Completely transparent.
步骤202，在平板地图中的海平面下方建立绘图层；Step 202, establishing a drawing layer below the sea level in the flat map;
选取海拔小于最低海平面的位置，建绘图层。Select a location whose altitude is lower than the lowest sea level, and create a drawing layer.
步骤203，在绘图层上绘制气象图。Step 203, draw a weather map on the drawing layer.
本发明实施例二的技术方案带来的有益效果如下：The beneficial effects brought by the technical solution of Embodiment 2 of the present invention are as follows:
本发明实施例二通过建立网格密度精细的平板地图，引入DEM数据，根据DEM数据将海拔低于0的海平面设置为完全透明，并在其最低海拔以下的位置建立绘图层，使节目制作人员可以在绘图层绘图后直接应用便可达到只在海洋上作图的效果，且当背景陆地层和海洋层变动时仍可使用，提高了制作效率，节省了节目制作时间，且通过调整绘图层的位置即可生成新的气象图，提高了气象图的复用率。Embodiment 2 of the present invention introduces DEM data by establishing a flat map with a fine grid density, sets the sea level below 0 altitude to be completely transparent according to the DEM data, and establishes a drawing layer at a position below the lowest altitude, so that program production Personnel can directly apply it after drawing on the drawing layer to achieve the effect of only drawing on the ocean, and it can still be used when the background land layer and ocean layer change, which improves production efficiency and saves program production time, and by adjusting the drawing A new weather map can be generated according to the position of the layer, which improves the reuse rate of the weather map.
本发明实施例三提供了一种海洋气象图的绘制系统，包括以下单元：Embodiment 3 of the present invention provides a kind of drawing system of marine meteorological map, comprises following unit:
单元301，海平面拉低单元，用于根据所述数字高程模型的数据，将所述平板地图中的海平面拉低，生成新平板地图和新海平面，具体包括以下子单元：Unit 301, the sea level lowering unit, is used to lower the sea level in the flat map according to the data of the digital elevation model to generate a new flat map and a new sea level, specifically including the following subunits:
海拔高度值识别子单元，用于识别海拔高度值小于零的像素点，在引入的数字高程模型(DEM)数据中，海洋的部分海拔高度值都小于零，本发明优选的，在顶点着色器(Shader)中判断；Altitude value identification subunit, used to identify the pixel points whose altitude value is less than zero, in the imported digital elevation model (DEM) data, the partial altitude values of the ocean are all less than zero, preferably in the present invention, in the vertex shader (Shader) to judge;
拉低子单元，用于将海拔高度值小于零的顶点的海拔高度值拉低，优选的，将海平面的高度拉低10000米，生成新平板地图和新海平面。The lowering subunit is used for lowering the altitude value of the vertex whose altitude value is less than zero, preferably, lowering the height of the sea level by 10000 meters to generate a new flat map and a new sea level.
单元302，绘图层生成单元，用于在新海平面所在平面与所述新平板地图的陆地所在平面之间，建立绘图层；Unit 302, a drawing layer generating unit, is used to establish a drawing layer between the plane where the new sea level is located and the plane where the land of the new flat map is located;
本发明优选的，在海拔高度为-5000的位置建立绘图层。Preferably in the present invention, the drawing layer is established at a position whose altitude is -5000.
单元303，气象图绘制单元，用于在绘图层上绘制气象图。Unit 303, a weather map drawing unit, is used to draw a weather map on the drawing layer.
本发明实施例三的技术方案带来的有益效果如下：The beneficial effects brought by the technical solution of Embodiment 3 of the present invention are as follows:
本发明实施例三通过海平面拉低单元中的海拔高度值识别子单元识别DEM数据中海拔低于0的像素点，通过海平面拉低单元中的拉低子单元将海拔高度值低于0的海平面拉低到10000米，并通过绘图层生成单元在其间海拔为-5000的位置建立绘图层，使节目制作人员可以在通过气象图绘制单元绘图后直接应用便可达到只在海洋上作图的效果，且当背景陆地层和海洋层变动时仍可使用，提高了制作效率，节省了节目制作时间，且通过调整绘图层的位置即可生成新的气象图，提高了气象图的复用率。Embodiment 3 of the present invention uses the altitude value identification subunit in the sea level lowering unit to identify pixels whose altitude is lower than 0 in the DEM data, and uses the lowering subunit in the sea level lowering unit to reduce the altitude value below 0 The sea level is lowered to 10,000 meters, and the drawing layer is established at an altitude of -5000 through the drawing layer generation unit, so that the program producers can directly apply it after drawing through the weather map drawing unit to achieve only on the ocean. The effect of the map, and it can still be used when the background land layer and ocean layer change, which improves production efficiency and saves program production time, and a new weather map can be generated by adjusting the position of the drawing layer, which improves the complexity of the weather map. utilization rate.
本发明实施例四提供了一种海洋气象图的绘制系统，包括以下单元：Embodiment 4 of the present invention provides a kind of drawing system of marine meteorological map, comprises following unit:
单元401，海平面抠像单元，用于根据数字高层模型的数据，将平板地图中的海平面设置为完全透明，具体包括：Unit 401, the sea level matting unit, is used to set the sea level in the flat map to be completely transparent according to the data of the digital high-rise model, specifically including:
海拔高度值识别子单元，用于识别所述平板地图中对应的数字高程模型中海拔高度值小于零的像素点，优选的，在像素shader中判断像素点对应的海拔高度；Altitude value identification subunit, used to identify the pixel points whose altitude value is less than zero in the corresponding digital elevation model in the flat map, preferably, determine the altitude corresponding to the pixel point in the pixel shader;
抠像子单元，用于将海拔高度值小于零的像素点的透明度设置为完全透明。The keying subunit is used to set the transparency of pixels whose altitude value is less than zero to be completely transparent.
单元402，绘图层生成单元，用于在平板地图中的海平面下方建立绘图层；Unit 402, a drawing layer generating unit, is used to establish a drawing layer below the sea level in the flat map;
其中，选取海拔小于最低海平面的位置，建绘图层。Among them, select a location whose altitude is lower than the lowest sea level to build a drawing layer.
单元403，气象图绘制单元，用于在绘图层上绘制气象图。Unit 403, a weather map drawing unit, is used to draw a weather map on the drawing layer.
本发明实施例四通过海平面抠像单元中的海拔高度值识别子单元识别DEM数据中海拔低于0的像素点，通过海平面抠像单元中的抠像子单元将海拔高度值低于0的海平面设置为全部透明，并通过绘图层生成单元在其最低海拔以下的位置建立绘图层，使节目制作人员可以在通过气象图绘制单元绘图后直接应用便可达到只在海洋上作图的效果，且当背景陆地层和海洋层变动时仍可使用，提高了制作效率，节省了节目制作时间，且通过调整绘图层的位置即可生成新的气象图，提高了气象图的复用率。Embodiment 4 of the present invention uses the altitude value identification subunit in the sea level matting unit to identify pixels whose altitude is lower than 0 in the DEM data, and uses the matting subunit in the sea level matting unit to identify the pixels whose altitude is lower than 0 The sea level is set to be fully transparent, and the drawing layer is established at the position below the lowest altitude through the drawing layer generation unit, so that the program producers can directly apply it after drawing through the weather map drawing unit to achieve the effect of only drawing on the ocean Effect, and it can still be used when the background land layer and ocean layer change, which improves production efficiency and saves program production time, and a new weather map can be generated by adjusting the position of the drawing layer, which improves the reuse rate of weather maps .
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到本发明可以通过硬件实现，也可以可借助软件加必要的通用硬件平台的方式来实现，基于这样的理解，本发明的技术方案可以以软件产品的形式体现出来，该软件产品可以存储在一个非易失性存储介质(可以是CD-ROM，U盘，移动硬盘等)中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本发明各个实施例所述的方法。Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be realized by hardware, or by means of software plus a necessary general-purpose hardware platform. Based on this understanding, the technology of the present invention The solution can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be CD-ROM, U disk, mobile hard disk, etc.), and includes several instructions to make a computer device ( It may be a personal computer, a server, or a network device, etc.) to execute the methods described in various embodiments of the present invention.
总之，以上所述仅为本发明的较佳实施例而已，并非用于限定本发明的保护范围。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。In a word, the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.
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