proj.db file is missing which is required to create coordinate transformation.

[sravanporipireddy]

const char* pszProjection = GDALGetProjectionRef(dataset);
    if (pszProjection != NULL) {
        printf("[GDAL]Projection ref is: %s\n", pszProjection);
    } else {
        printf("[GDAL]Projection reference is NULL.\n");
    }
    //Create spatial reference from WKT
    OGRSpatialReferenceH datasetSRS = OSRNewSpatialReference(pszProjection);
    if (datasetSRS == NULL) {
        NSLog(@"[GDAL]Failed to create spatial reference from WKT");
        GDALClose(dataset);
        return nil;
    }

In the above scenario to create spatial reference for a given gdal dataset using projection reference, we need proj.db file which usually is generated while creating proj lib.

Can you make this generated proj.db file a part of this.

[Lumyk]

const char* pszProjection = GDALGetProjectionRef(dataset);
    if (pszProjection != NULL) {
        printf("[GDAL]Projection ref is: %s\n", pszProjection);
    } else {
        printf("[GDAL]Projection reference is NULL.\n");
    }
    //Create spatial reference from WKT
    OGRSpatialReferenceH datasetSRS = OSRNewSpatialReference(pszProjection);
    if (datasetSRS == NULL) {
        NSLog(@"[GDAL]Failed to create spatial reference from WKT");
        GDALClose(dataset);
        return nil;
    }

In the above scenario to create spatial reference for a given gdal dataset using projection reference, we need proj.db file which usually is generated while creating proj lib.

Can you make this generated proj.db file a part of this.

Hi, you could check build 1.0.1

[sravanporipireddy]

Hey, I did check 1.0.1 but there is no proj.db file.

Using the following code we should be able to achieve that provided we have proj.db in the app bundle.

if let projDbPath = Bundle.main.path(forResource: "proj", ofType: "db") {
            let projLibPath = (projDbPath as NSString).deletingLastPathComponent
            setenv("PROJ_LIB", projLibPath, 1)
            OrcaLog.info?.message("[Map2D] PROJ_LIB env set to: \(projLibPath)")
        } else {
            OrcaLog.error?.message("[Map2D] proj.db not found in the app bundle.")
        }

[Lumyk]

Hey, I did check 1.0.1 but there is no proj.db file.

Using the following code we should be able to achieve that provided we have proj.db in the app bundle.

if let projDbPath = Bundle.main.path(forResource: "proj", ofType: "db") {
            let projLibPath = (projDbPath as NSString).deletingLastPathComponent
            setenv("PROJ_LIB", projLibPath, 1)
            OrcaLog.info?.message("[Map2D] PROJ_LIB env set to: \(projLibPath)")
        } else {
            OrcaLog.error?.message("[Map2D] proj.db not found in the app bundle.")
        }

proj.db can’t be in the main bundle. You can find it in gdal.xcframework added in the headers folder. Here you can find the latest compiled file. This framework is installed as a dependency for this library. So, if you need exactly proj.db, you can find it in the framework bundle. Maybe I missed some idea, anyway, you are welcome to PR ;)

[sravanporipireddy]

Unfortunately i am not able to build this on my machine.
You can copy proj.db to your project and update the package.swift file with resources this way we can make this file a part of bundle and access it.

    ```

.target(
name: "gdal-swift",
dependencies: ["gdal"],
resources: [
.process("proj.db")]
path: "Sources",
exclude: ["gdal"],
cSettings: [.define("VALID_ARCHS", to: "arm64")],
cxxSettings: [.define("VALID_ARCHS", to: "arm64")],
linkerSettings: [
.linkedLibrary("sqlite3"),
.linkedLibrary("z"),
.linkedLibrary("xml2"),
.linkedLibrary("iconv")
]
)

You can follow the link below if you need further clarification
[https://developer.apple.com/documentation/xcode/bundling-resources-with-a-swift-package]