CN116150291A - Geographic information writing method, device, equipment and computer medium - Google Patents
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Abstract
Geographic information writing method, device, equipment and computer medium relate to the technical field of remote sensing, in particular to a data writing technology. The method solves the problem that the current meteorological satellite data products are inconvenient to apply because the encountered data products have no longitude and latitude information in provincial satellite remote sensing application. According to the geographic information writing method, a data matrix, a space reference system and a geographic information label are respectively obtained according to data products based on EASE-Grid projection, and then data fusion is carried out on the data matrix, the space reference system and the geographic information label, so that the data products with longitude and latitude information are obtained. The method is suitable for writing the geographic information in the remote sensing inversion data product of the wind-cloud series polar orbit meteorological satellite.
Description
Technical Field
The invention relates to the technical field of remote sensing, in particular to a data writing technology.
Background
In order to improve the application capability of domestic weather satellite remote sensing products, a plurality of data products based on domestic weather satellites are released by a weather satellite remote sensing data service network, wherein the data products can also be called remote sensing products, remote sensing data products or product data sets and the like, and the data products are binary files coded according to a certain format and can be checked or edited by software with corresponding decoding capability, such as GIS software. The product data sets can realize real-time and mass production thanks to the scientific inversion algorithm and efficient data processing capability of the national satellite weather center. For provincial satellite telesensing, the adoption of the national product data sets plays a positive role in improving provincial remote sensing business capacity, standardization and working efficiency.
The weather satellite data products adopt EASE-Grid (equal area telescopic earth Grid) projection, and the data products have no longitude and latitude information, so that in provincial application of the weather satellite data products, users are required to have certain data processing capacity to further apply the data products, and the technical threshold requirements on the users are higher; moreover, within current weather systems, there is no processing technology for weather satellite data products. At present, due to the limitation of the reasons, the product data sets are difficult to popularize and apply in Heilongjiang province and have low utilization rate.
Disclosure of Invention
The invention aims to solve the problem that the current meteorological satellite data products are inconvenient to apply because the encountered data products have no longitude and latitude information in provincial satellite remote sensing application.
The invention relates to a geographic information writing method of a polar orbit meteorological satellite remote sensing product, which has the following technical scheme:
the geographic information writing method specifically comprises the following steps:
s1, performing format conversion on a data product based on EASE-Grid projection to obtain a data matrix;
s2, constructing a space reference system based on EASE-Grid projection parameters;
s3, constructing a geographic information tag based on the data product;
and S4, carrying out data fusion on the data matrix, the space reference system and the geographic information tag to obtain a data product with longitude and latitude information.
Further, there is provided a preferred embodiment, further comprising, after step S4: the vector inspection comprises the following steps: s5, comparing the longitude and latitude information of the data product with the longitude and latitude information with longitude and latitude information in an external vector map, and judging whether the longitude and latitude information and the longitude and latitude information are matched: if the geographic information is matched, the geographic information is written; otherwise, turning to step S3, reconstructing the geographic information tag until the matching condition is met, and finishing writing the proxy information.
Further, there is provided a preferred embodiment, further comprising, after step S5: the projection mode conversion step specifically comprises the following steps:
s6, converting the projection of the data product with the longitude and latitude information into a preset projection mode by an EASE-Grid projection mode.
Further, a preferred embodiment is provided, wherein the spatial reference frame is represented as a spatial reference frame structure, and the spatial reference frame structure contains spatial variable attributes, and each spatial variable attribute records a corresponding variable name, variable value and variable data type.
Further, there is provided a preferred embodiment, wherein the spatial variable attribute at least comprises: "xWorldLimits" variable attribute, which represents the range size of the x coordinate axis at 25km resolution, with variable values of [ -9036842.76, 9036842.76]; "YWorldLimites" variable attribute, which represents the range size of the y-axis at 25km resolution, also has a variable value of [ -9036842.76, 9036842.76].
Further, there is provided a preferred embodiment, wherein when the spatial reference system structure represents data of a northern hemisphere region, the corresponding spatial variable attribute is set to: the "ColumnsStartfrom" variable attribute, which indicates that the column starts with its variable value of "north"; the "RowsStartfrom" variable attribute, which indicates that the line starts with its variable value of "west".
Further, a preferred embodiment is provided, wherein the geographic information tag is represented as a geographic information tag structure, and the geographic information tag structure contains geographic information key attributes, and each geographic information key attribute records a corresponding key name, a key value and a key data type.
The invention also provides a geographic information writing device of the polar orbit meteorological satellite remote sensing product, which has the following technical scheme:
the geographic information writing device specifically comprises:
a module for converting the format of the data product based on EASE-Grid projection to obtain a data matrix;
based on EASE-Grid projection parameters, constructing a module of a space reference system;
a module for constructing a geographic information tag based on the data product;
and carrying out data fusion on the data matrix, the space reference system and the geographic information tag to obtain a module of the data product with longitude and latitude information.
The invention also provides geographic information writing equipment of the polar orbit meteorological satellite remote sensing product, which has the following technical scheme:
comprising the following steps: a processor and a memory for storing executable instructions of the processor, the processor being configured to perform the above-described method of geographic information writing for an polar orbiting meteorological satellite telemetry product via execution of the executable instruction claims.
The invention also provides a computer storage medium, which has the following technical scheme:
the storage medium stores a computer program, and when the computer program runs, the method for writing the geographic information of the polar orbit meteorological satellite remote sensing product is executed.
The invention has the following beneficial effects:
the invention can lead the data products to be directly used by GIS software in provincial service or scientific research by writing latitude and longitude information into the data products, thereby facilitating the application of the data products in provincial satellite remote sensing.
The invention aims at EASE-Grid (a Grid definition) projection adopted in a wind cloud series polar orbit meteorological satellite remote sensing inversion product data set, and after geographic information is written into a data product based on the EASE-Grid projection, the data product can be well matched with vector data, so that the problem of geographic registration of the data product and the vector file or other types of data (such as topographic data) is solved, the use threshold of the data product is further reduced, and the utilization rate of the national satellite remote sensing product in provincial application is improved.
The method disclosed by the invention can be suitable for various wind and cloud series polar orbit meteorological satellite remote sensing inversion data products, such as remote sensing data set products of snowwater equivalent days, global land surface temperature, sea ice concentration, global sea surface temperature and the like. At present, adaptability test is carried out on the basis of wind-cloud series polar orbit meteorological satellites, and the data set product processed by the method has better applicability.
The method, the device, the equipment and the computer medium for writing the geographic information of the polar orbit meteorological satellite data product are suitable for writing the geographic information in the remote sensing inversion data product of the wind cloud series polar orbit meteorological satellite.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for writing geographic information in a preferred embodiment of the invention;
FIG. 2 is a schematic diagram of a snow water equivalent day data product (track lifting) prior to geographic information writing in a preferred embodiment of the present invention;
FIG. 3 is a schematic diagram of a snow water equivalent day data product (track lifting) after geographic information writing in according to a preferred embodiment of the present invention;
FIG. 4 is a diagram showing the data attribute (HDF 5 format) before writing the geographic information tag according to the preferred embodiment of the present invention;
FIG. 5 is a diagram of a data attribute (GeoTIFF format) after a geographic information tag is written in a preferred embodiment of the present invention;
FIG. 6 is a schematic diagram of the GCS_WGS_1984 coordinate system when the EASE-Grid projection is used for the snow water equivalent data product after the geographic information is written in the preferred embodiment of the present invention;
FIG. 7 is a schematic diagram of a snow water equivalent data product after writing geographic information, which is processed into equal longitude and latitude projections by the approach difference method (NEAREST) from EASE-Grid projections, in a GCS_WGS_1984 coordinate system according to a preferred embodiment of the present invention;
FIG. 8 is a schematic diagram of a North sea ice concentration data product after geographic information is written in accordance with a preferred embodiment of the present invention;
FIG. 9 is a schematic diagram of a snow depth data product of Heilongjiang province based on FY3D/MWRI data inversion, written with geographic information and converted into equal longitude and latitude projections in accordance with a preferred embodiment of the present invention;
FIG. 10 is a schematic diagram of a snow water equivalent data product of Heilongjiang province based on FY3D/MWRI data inversion, written with geographic information and converted into equal longitude and latitude projections in accordance with a preferred embodiment of the present invention;
FIG. 11 is a schematic diagram of a normalized snow index data product from Heilongjiang province based on FY3D/MERSI data inversion in accordance with a preferred embodiment of the present invention;
FIG. 12 is a schematic diagram of a Nigrongjiang province snow depth data product based on fusion of FY3D/MWRI and FY3D/MERSI data inversion products in a preferred embodiment of the present invention;
FIG. 13 is a schematic diagram of a snow water equivalent data product of Heilongjiang province based on the fusion of FY3D/MWRI and FY3D/MERSI data inversion products in a preferred embodiment of the present invention.
Detailed Description
In order to make the technical solution and the advantages of the present invention more clear, the detailed description of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The data product of the invention can also be called a remote sensing data product, a remote sensing product or a product data set, etc.
In order to solve the problem of the application level of the wind cloud satellite data products in the provincial level, the invention provides a data processing method for writing geographic information into the wind cloud series satellite remote sensing products, taking the snow water equivalent remote sensing products as an example, and improves the provincial level application capability of the domestic wind cloud series polar orbit meteorological satellites. Of course, the geographic information writing method can also solve similar problems of other data set products. At present, adaptability tests are carried out on remote sensing data set products such as global land surface temperature, sea ice concentration, global sea surface temperature and the like based on wind cloud series polar orbit meteorological satellites, and the processed data set products have good applicability.
In a first embodiment, referring to fig. 1 to 7, the present embodiment provides a geographic information writing method for a polar orbiting meteorological satellite remote sensing product, which is specifically implemented as follows:
the geographic information writing method specifically comprises the following steps:
s1, performing format conversion on a data product based on EASE-Grid projection to obtain a data matrix;
s2, constructing a space reference system based on EASE-Grid projection parameters;
s3, constructing a geographic information tag based on the data product;
and S4, carrying out data fusion on the data matrix, the space reference system and the geographic information tag to obtain a data product with longitude and latitude information.
In the embodiment, the longitude and latitude information is written in the data products, so that the data products can be directly used by GIS software in provincial service or scientific research, and the data products can be conveniently applied to provincial satellite remote sensing. According to the embodiment, the EASE-Grid projection adopted in the data set of the wind cloud series polar orbit meteorological satellite remote sensing inversion product is aimed at, geographical information is written into the data product based on the EASE-Grid projection, then the data product can be well matched with vector data, the problem of geographic registration of the data product and the vector file or other types of data (such as topographic data) is solved, the use threshold of the data product is further reduced, and the utilization rate of the national satellite remote sensing product in provincial application is improved. The method of the embodiment can be suitable for various data products, such as remote sensing data set products of snowwater equivalent days, global land surface temperature, sea ice concentration, global sea surface temperature and the like. At present, adaptability test is carried out on the basis of wind-cloud series polar orbit meteorological satellites, and the data set product processed by the method has better applicability.
In this embodiment, the data product is developed based on EASE-Grid projection, and the data product may also be called a remote sensing product, a remote sensing data product or a product data set, etc., and may also be simply called a product for convenience of discussion. The data products are binary files encoded in a format that can be viewed or edited by software having corresponding decoding capabilities, such as by using GIS-like software.
In a more specific embodiment, the EASE-Grid projection based data product is a Snow Water Equivalent (SWE) product dataset of a wind cloud series polar orbiting meteorological satellite of a national satellite meteorological center; the snow water equivalent product dataset is developed based on microwave imager (MWRI) data, the data type is HDF5 format, the projection mode is southern and northern hemisphere azimuth projection (Southern Hemisphere, lambert Azimuthal & Northern Hemisphere, lambert Azimuthal) and the resolution is 25km, the snow water equivalent product dataset comprises snow depth and snow water equivalent global area (southern and northern hemispheres) ascending/descending orbit products, and the snow water equivalent product dataset description is shown in table 1.
Table 1 attribute table of snowwater equivalent product data set developed by microwave imager
In a more specific embodiment, the data product based on EASE-Grid projection can also be global land surface temperature, sea ice concentration, global sea surface temperature and the like based on the wind cloud series polar orbit meteorological satellites of the national satellite meteorological center; in the first embodiment, the geographic information writing method performs adaptability test on the data products, and the data products processed by the method have better applicability in provincial applications.
In a more specific embodiment, the step S4 performs data fusion on the data matrix, the spatial reference system and the geographic information tag to obtain a data product with longitude and latitude information, which specifically includes:
and outputting the constructed space reference system and the geographic information tag together with the data matrix into a GeoTIFF file with the extension of tif through a GeoTIFFwrite function. The write function format is:
‘GeoTIFFwrite(‘filename.GIF’,Data_Matrix,R,'GeoKeyDirectoryTag',info_Northern)’。
wherein filename. Tif is the file name to be output, data_matrix is the snow water equivalent product Data Matrix under read-in EASE-Grid projection, the rank number of which should satisfy 721×721, R is the constructed spatial reference system, and info_northern is the constructed geographic information tag (GeoKeyDirectyTag).
The data written by the geographic information tag is output in a TIFF file format, and after being imported by GIS software, the data file has longitude and latitude information and can be accurately matched with a vector map.
In a second embodiment, the present embodiment is described with reference to fig. 1 to 7, and the present embodiment is further limited to the geographic information writing method of the polar orbiting meteorological satellite remote sensing product described in the first embodiment, and the specific implementation content is as follows:
after step S4, the method further comprises: the vector inspection comprises the following steps:
s5, comparing the longitude and latitude information of the data product with the longitude and latitude information with longitude and latitude information in an external vector map, and judging whether the longitude and latitude information and the longitude and latitude information are matched:
if the geographic information is matched, the geographic information is written;
otherwise, turning to step S3, reconstructing the geographic information tag until the matching condition is met, and finishing writing the proxy information.
In this embodiment, the external vector map is a vector map which is imported from the GIS software itself or from the outside after the data product is imported into the GIS software. After embodiment one step S4, the data product already carries latitude and longitude information and can be matched with a vector map, this step is also called geographic registration of the satellite image data product and the vector data.
In the embodiment, after the data products based on EASE-Grid projection are written into geographic information, the data products can be well matched with vector data, so that the use threshold of meteorological satellite remote sensing inversion data products is reduced, the utilization rate of the data products is improved, and the problem of geographic registration in analysis processing of product data sets and vector files or other types of data (such as topographic data) possibly occurring in provincial applications of the traditional national satellite remote sensing products is solved.
In this embodiment, the data product written with the geographic information is the same area projection data of EASE-Grid with longitude and latitude information, and can be conveniently imported into GIS software for editing.
In a more specific embodiment, as can be seen from fig. 2 and 3, the data product with the geographic information written therein, which already carries longitude and latitude information projected by the EASE-Grid northern hemisphere, can be accurately matched with the vector map; it can be seen from fig. 4 and 5 that the snow water equivalent data product after writing the geographic information tag already contains a spatial reference to the EASE-Grid northern hemisphere projection.
In a third embodiment, the present embodiment is described with reference to fig. 1 to 7, and the present embodiment is further described with reference to a data product obtained by the geographic information writing method of the polar orbiting meteorological satellite remote sensing product in the second embodiment, where the specific implementation content is as follows:
after step S5, the method further comprises: the projection mode conversion step specifically comprises the following steps:
s6, converting the projection of the data product with the longitude and latitude information into a preset projection mode by an EASE-Grid projection mode.
In this embodiment, the data product with the geographic information written is a data product with longitude and latitude information based on EASE-Grid and other area projection, and when the data product is comprehensively analyzed or fused with other kinds of data, there may be a problem that the pixel of the display image is deformed due to mismatching of the projection mode and the coordinate system; therefore, a resampling interpolation method is adopted for the data product, and the projection mode is converted into a preset projection mode by the area projection such as EASE-Grid and the like; different kinds of data can adopt different kinds of coordinate systems and further can adopt different projection modes, so that the preset projection modes are selected according to specific conditions, the data of comprehensive analysis or fusion calculation are different, or the selected coordinate systems are different, and the preset projection modes are different; the method of resampling interpolation used is also different when different predetermined projection modes are selected.
In a more specific embodiment, as shown in fig. 6 and 7, to convert the snow water equivalent data product from the EASE-Grid projection to an image displayed in the gcs_wgs_1984 projection coordinate system before and after the equal latitude and longitude projection. As can be seen from the figure, after geographic information is written, the snow water equivalent data product of the polar orbiting meteorological satellite is still an azimuth angle equal area projection based on EASE-Grid, and the pixels of the display image are deformed under the GCS_WGS_1984 coordinate system; after the projection of the snow water equivalent data product is converted into equal longitude and latitude projection by adopting a proximity difference method (NEAREST), the pixels of the display image can not be deformed under the GCS_WGS_1984 coordinate system, so that the subsequent analysis and calculation can be conveniently carried out by matching with other types of data products.
In a more specific embodiment, the projection mode of the data product after the geographic information is written can be converted into the projection mode meeting the conditions by adopting a corresponding difference method according to the difference of other types of data which are comprehensively analyzed or fused to be calculated as required or according to the difference of the adopted coordinate systems under the condition of ensuring the data precision and the usability.
In a more specific embodiment, the step of projective mode conversion is further illustrated by the example of the present embodiment in which the black longjiang province Snow Depth (SD) data product and the black longjiang province Snow Water Equivalent (SWE) data product, which are inverted based on FY3D/MWRI data, are respectively subjected to resolution up-blended with the contemporaneous black longjiang province normalized snow index (NDSI) data product, which is inverted based on FY3D/MERSI data, in conjunction with fig. 9-13:
firstly, adopting a geographic writing method of the first embodiment to write geographic information into a Heilongjiang province snow depth data product and a Heilongjiang province snow water equivalent data product which do not contain geographic information originally based on EASE-Grid projection, and obtaining a data product with the geographic information;
then, the data products with the geographic information are converted into equal longitude and latitude projections from EASE-Grid projections by adopting a proximity difference method, so that the equal longitude and latitude projection-based snow depth data products and the equal snow water equivalent data products with the geographic information are obtained;
finally, adopting a Heilongjiang province normalized snow index data product (resolution 1 km) inverted by FY3D/MERSI data, carrying out resolution-raising fusion on the Heilongjiang province snow depth data product (resolution 25 km) and the Heilongjiang province snow equivalent data product (resolution 25 km) which are based on equal longitude and latitude projections and are based on FY3D/MWRI data inversion, and obtaining the Heilongjiang province snow equivalent data product (resolution 1 km) and the Heilongjiang province snow equivalent data product (resolution 1 km) which are based on the fusion of FY3D/MWRI and FY3D/MERSI data inversion products, wherein the schematic diagram of the fused data product clearly shows snow distribution conditions of places and cities of the Heilongjiang province after the snowfall process;
wherein 'FY 3D' represents 'wind cloud No. three series polar orbit meteorological satellite D star', 'MWRI' represents 'microwave imager', 'MERSI' represents 'medium resolution spectrum imager'; the data inversion means that the physical quantity A which is wanted is difficult to be measured by an instrument directly, but the physical quantity A and the physical quantity B have real physical relations, and the instrument can directly measure the physical quantity B, so that the physical quantity A can be reversely deduced by the measured physical quantity B by utilizing the physical relations and a mathematical model; the resolution before fusion is 25km, and the resolution after fusion is 1km; the resolution of the normalized snow index data product in Heilongjiang province is 1km, and the normalized snow index data product is other kinds of data products used for fusion calculation; the term "up-resolution" in the term "up-resolution fusion" refers to "conversion from low resolution to high resolution", one basic feature of the remote sensing image is "spatial resolution", and the remote sensing image data of different spatial resolutions are fused, so that scale conversion is required, and besides "up-resolution", there is "down-resolution", that is, "conversion from high resolution to low resolution".
In a fourth embodiment, referring to fig. 1 to 7, the present embodiment is a further limitation of format conversion in step S1 in the method for writing geographic information of a polar orbiting meteorological satellite remote sensing product according to the first embodiment, and the specific implementation contents are as follows:
the data product based on EASE-Grid projection is converted from HDF format to GeoTIFF format.
In a fifth embodiment, referring to fig. 1 to 7, the present embodiment is a further limitation of the space reference system in the method for writing geographic information of a polar orbiting meteorological satellite remote sensing product according to the first embodiment, and the specific implementation contents are as follows:
the spatial reference system is expressed as a spatial reference system structure body, and the spatial reference system structure body comprises spatial variable attributes, and each spatial variable attribute records a corresponding variable name, a variable value and a variable data type.
In a more specific embodiment, the spatial reference frame has a rank number 721×721, which is the same as the rank number of the snow water equivalent remote sensing product dataset.
In a more specific embodiment, the spatial reference frame structure is created by matlab software and the write command is maprefels. The spatial reference system structure content, i.e., the variable properties of the spatial reference system, are shown in table 2.
TABLE 2 spatial reference frame R variable attribute table
In a sixth embodiment, referring to fig. 1 to 7, the present embodiment is a method for writing geographic information of a polar orbiting meteorological satellite remote sensing product according to the fifth embodiment, where the specific implementation content is as follows:
the spatial variable attribute comprises at least:
"xWorldLimits" variable attribute, which represents the range size of the x coordinate axis at 25km resolution, with variable values of [ -9036842.76, 9036842.76];
"YWorldLimites" variable attribute, which represents the range size of the y-axis at 25km resolution, also has a variable value of [ -9036842.76, 9036842.76].
An embodiment seven, which is described with reference to fig. 1 to 7, is a further limitation of the spatial reference frame structure in the method for writing geographic information of a polar orbiting meteorological satellite remote sensing product according to the sixth embodiment, and the specific implementation contents are as follows:
when the spatial reference system structure represents data of a northern hemisphere region, the corresponding spatial variable attribute is set as:
the "ColumnsStartfrom" variable attribute, which indicates that the column starts with its variable value of "north";
the "RowsStartfrom" variable attribute, which indicates that the line starts with its variable value of "west".
In this embodiment, for northern hemisphere regions, the values of the variables 'columnstartfrom' and 'rowssstartfrom' are required to be set separately as 'north' and 'west', respectively.
An eighth embodiment is described with reference to fig. 1 to 7, and the embodiment is further defined by the geographic information tag in the geographic information writing method of the polar orbiting meteorological satellite remote sensing product according to the first embodiment, and specifically implemented as follows:
the geographic information label is expressed as a geographic information label structure body, the geographic information label structure body comprises geographic information key attributes, and each geographic information key attribute records a corresponding key name, a key value and a key data type.
In this embodiment, geographical information labels of EASE-Grid projection data are constructed, and the key values of the geographical information labels (GeoKeyDirectyTag) are 19 in total, and the key value contents of the geographical information label structure are shown in Table 3.
TABLE 3 GeoKeyDirectyTag Main Key value Attribute Table
An embodiment nine, which is described with reference to fig. 1 to 7, provides a geographic information writing device for a remote sensing product of a polar orbiting meteorological satellite, and the specific implementation contents are as follows:
the geographic information writing device specifically comprises:
a module for converting the format of the data product based on EASE-Grid projection to obtain a data matrix;
based on EASE-Grid projection parameters, constructing a module of a space reference system;
a module for constructing a geographic information tag based on the data product;
and carrying out data fusion on the data matrix, the space reference system and the geographic information tag to obtain a module of the data product with longitude and latitude information.
In a tenth embodiment, referring to fig. 1 to 7, the present embodiment provides a geographic information writing device for a remote sensing product of a polar orbiting meteorological satellite, where the specific implementation content is as follows:
a geographic information writing device for an polar orbit meteorological satellite remote sensing product, comprising: a processor and a memory for storing executable instructions of the processor, the processor configured to perform the geographic information writing method of an polar orbiting meteorological satellite remote sensing product of any of the above embodiments via execution of the executable instruction claims.
An eleventh embodiment is described with reference to fig. 1 to 7, and provides a computer storage medium, which is specifically implemented as follows:
a computer storage medium, wherein a computer program is stored in the storage medium, and when the computer program runs, the method for writing geographic information of the polar orbiting meteorological satellite remote sensing product according to any one of the above embodiments is executed.
The technical solution provided by the present invention is described in further detail through several specific embodiments, so as to highlight the advantages and benefits of the technical solution provided by the present invention, however, the above specific embodiments are not intended to be limiting, and any reasonable modification and improvement, reasonable combination of embodiments, equivalent substitution, etc. of the present invention based on the spirit and principle of the present invention should be included in the scope of protection of the present invention.
Claims (10)
1. The geographic information writing method of the polar orbit meteorological satellite remote sensing product is characterized by comprising the following steps of:
s1, performing format conversion on a data product based on EASE-Grid projection to obtain a data matrix;
s2, constructing a space reference system based on EASE-Grid projection parameters;
s3, constructing a geographic information tag based on the data product;
and S4, carrying out data fusion on the data matrix, the space reference system and the geographic information tag to obtain a data product with longitude and latitude information.
2. The method for writing geographic information of a polar orbiting meteorological satellite remote sensing product according to claim 1, further comprising, after step S4: the vector inspection comprises the following steps:
s5, comparing the longitude and latitude information of the data product with the longitude and latitude information with longitude and latitude information in an external vector map, and judging whether the longitude and latitude information and the longitude and latitude information are matched:
if the geographic information is matched, the geographic information is written;
otherwise, turning to step S3, reconstructing the geographic information tag until the matching condition is met, and finishing writing the proxy information.
3. The method for writing geographic information of a polar orbiting meteorological satellite remote sensing product according to claim 2, further comprising, after step S5: the projection mode conversion step specifically comprises the following steps:
s6, converting the projection of the data product with the longitude and latitude information into a preset projection mode by an EASE-Grid projection mode.
4. The method for writing geographic information of polar orbiting meteorological satellite remote sensing products according to claim 1, characterized in that:
the spatial reference system is expressed as a spatial reference system structure body, and the spatial reference system structure body comprises spatial variable attributes, and each spatial variable attribute records a corresponding variable name, a variable value and a variable data type.
5. The method for writing geographic information of a polar orbiting meteorological satellite remote sensing product according to claim 4, wherein the method comprises the following steps:
the spatial variable attribute comprises at least:
"xWorldLimits" variable attribute, which represents the range size of the x coordinate axis at 25km resolution, with variable values of [ -9036842.76, 9036842.76];
"YWorldLimites" variable attribute, which represents the range size of the y-axis at 25km resolution, also has a variable value of [ -9036842.76, 9036842.76].
6. The method for writing geographic information of a polar orbiting meteorological satellite remote sensing product according to claim 4, wherein the method comprises the following steps:
when the spatial reference system structure represents data of a northern hemisphere region, the corresponding spatial variable attribute is set as:
the "ColumnsStartfrom" variable attribute, which indicates that the column starts with its variable value of "north";
the "RowsStartfrom" variable attribute, which indicates that the line starts with its variable value of "west".
7. The method for writing geographic information of polar orbiting meteorological satellite remote sensing products according to claim 1, characterized in that:
the geographic information label is expressed as a geographic information label structure body, the geographic information label structure body comprises geographic information key attributes, and each geographic information key attribute records a corresponding key name, a key value and a key data type.
8. The utility model provides a geographic information writing device of polar orbit meteorological satellite remote sensing product which characterized in that, geographic information writing device specifically includes:
a module for converting the format of the data product based on EASE-Grid projection to obtain a data matrix;
based on EASE-Grid projection parameters, constructing a module of a space reference system;
a module for constructing a geographic information tag based on the data product;
and carrying out data fusion on the data matrix, the space reference system and the geographic information tag to obtain a module of the data product with longitude and latitude information.
9. A geographic information writing device for an polar orbit meteorological satellite remote sensing product, comprising: a processor and a memory, wherein the memory is configured to store executable instructions of the processor, the processor being configured to perform the method of geographic information writing of an polar orbiting meteorological satellite telemetry product according to any one of claims 1 to 7 via execution of the executable instructions.
10. A computer storage medium, wherein a computer program is stored in the storage medium, and when the computer program is run, the method for writing geographic information of a polar orbiting meteorological satellite remote sensing product according to any one of claims 1 to 7 is executed.
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