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‎.nojekyll‎

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‎documentation/gdalfuns/epsg2proj.html‎

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<p>wkt2proj(wkt_str::String) = toPROJ4(importWKT(wkt_str))</p>
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<p>““” epsg2proj(code::Integer)</p>
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<pre><code>epsg2proj(code::Integer)</code></pre>
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<p>Convert a EPSG code into the PROJ4 form.</p>
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‎documentation/gdalfuns/epsg2wkt.html‎

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<p>epsg2proj(code::Integer) = toPROJ4(importEPSG(code))</p>
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<p>““” epsg2wkt(code::Integer, pretty::Bool=false)</p>
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<pre><code>epsg2wkt(code::Integer, pretty::Bool=false)</code></pre>
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<p>Convert a EPSG code into the WKT form. Use <code>pretty=true</code> to return a more human readable text.</p>
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‎documentation/gdalfuns/gdalread.html‎

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<p>function gdalshade(fname; kwargs…) d = KW(kwargs) band = ((val = find_in_dict(d, [:band], false)[1]) !== nothing) ? string(val) : “1” cmap = find_in_dict(d, CPTaliases)[1] # The color cannot be passed to second call to gdaldem</p>
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<pre><code>A = gdaldem(fname, "color-relief", ["-b", band], C=cmap)
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B = gdaldem(fname, "hillshade"; d...)
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blendimg!(A, B)</code></pre>
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<p>end</p>
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<section id="section" class="level1">
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<h1>—————————————————————————————————</h1>
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<p>““” gdalread(fname::AbstractString, opts=String[]; gdataset=false, kwargs…)</p>
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<pre><code>gdalread(fname::AbstractString, opts=String[]; gdataset=false, kwargs...)</code></pre>
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<p>Read a raster or a vector file from a disk file and return the result either as a GMT type (the default) or a GDAL dataset.</p>
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<ul>
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<li><code>fname</code>: Input data. It can be a file name, a <a href="../..\documentation/general/types.html#sec-grid-type">GMTgrid</a> or <a href="../..\documentation/general/types.html#sec-image-type">GMTimage</a> object or a GDAL dataset</li>
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<li><code>opts</code>: List of options. The accepted options are the ones of the gdal_translate utility. This list can be in the form of a vector of strings, or joined in a simgle string.</li>
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<li><code>gdataset</code>: If set to <code>true</code> forces the return of a GDAL dataset instead of a GMT type.</li>
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<li><code>kwargs</code>: This options accept the GMT region (-R) and increment (-I)</li>
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<li><p><code>fname</code>: Input data. It can be a file name, a <a href="../..\documentation/general/types.html#sec-grid-type">GMTgrid</a> or <a href="../..\documentation/general/types.html#sec-image-type">GMTimage</a> object or a GDAL dataset</p></li>
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<li><p><code>opts</code>: List of options. The accepted options are the ones of the gdal_translate utility. This list can be in the form of a vector of strings, or joined in a simgle string.</p></li>
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<li><p><code>gdataset</code>: If set to <code>true</code> forces the return of a GDAL dataset instead of a GMT type.</p></li>
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<li><p><code>kwargs</code>: This options accept the GMT region (-R) and increment (-I)</p></li>
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<section id="returns" class="level3">
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<h3 class="anchored" data-anchor-id="returns">Returns</h3>
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<p>A GMT grid/image or a GDAL dataset</p>
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</section>
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‎documentation/gdalfuns/geod.html‎

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<li><a href="#example-compute-two-lines-starting-at-00-with-lengths-111100-50000-heading-at-15-and-45-degrees." id="toc-example-compute-two-lines-starting-at-00-with-lengths-111100-50000-heading-at-15-and-45-degrees." class="nav-link active" data-scroll-target="#example-compute-two-lines-starting-at-00-with-lengths-111100-50000-heading-at-15-and-45-degrees.">Example: Compute two lines starting at (0,0) with lengths 111100 &amp; 50000, heading at 15 and 45 degrees.</a></li>
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<li><a href="#example" id="toc-example" class="nav-link active" data-scroll-target="#example">Example</a></li>
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<li>azi - forward azimuth (degrees) at destination [dest].</li>
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<section id="example-compute-two-lines-starting-at-00-with-lengths-111100-50000-heading-at-15-and-45-degrees." class="level2">
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<h2 class="anchored" data-anchor-id="example-compute-two-lines-starting-at-00-with-lengths-111100-50000-heading-at-15-and-45-degrees.">Example: Compute two lines starting at (0,0) with lengths 111100 &amp; 50000, heading at 15 and 45 degrees.</h2>
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<section id="example" class="level2">
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<h2 class="anchored" data-anchor-id="example">Example</h2>
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<p>Compute two lines starting at (0,0) with lengths 111100 &amp; 50000, heading at 15 and 45 degrees.</p>
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<pre><code>dest, = geod([0., 0], [15., 45], [[0, 10000, 50000, 111100.], [0., 50000]])[1]</code></pre>
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‎documentation/gdalfuns/geodesic.html‎

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<li><a href="#example-compute-an-geodesic-between-points-00-and-3050-discretized-at-100-km-steps." id="toc-example-compute-an-geodesic-between-points-00-and-3050-discretized-at-100-km-steps." class="nav-link active" data-scroll-target="#example-compute-an-geodesic-between-points-00-and-3050-discretized-at-100-km-steps.">Example: Compute an geodesic between points (0,0) and (30,50) discretized at 100 km steps.</a></li>
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<p>A Mx2 matrix with the lon lat of the points along the geodesic when input is a matrix. A GMT dataset or a vector of it (when input is Vector{GMTdataset}).</p>
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<section id="example-compute-an-geodesic-between-points-00-and-3050-discretized-at-100-km-steps." class="level2">
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<h2 class="anchored" data-anchor-id="example-compute-an-geodesic-between-points-00-and-3050-discretized-at-100-km-steps.">Example: Compute an geodesic between points (0,0) and (30,50) discretized at 100 km steps.</h2>
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<section id="example" class="level2">
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<h2 class="anchored" data-anchor-id="example">Example</h2>
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<p>Compute an geodesic between points (0,0) and (30,50) discretized at 100 km steps.</p>
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<pre><code>mat = geodesic([0 0; 30 50], step=100, unit=:k);</code></pre>
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‎documentation/gdalfuns/loxodrome_direct.html‎

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<li><a href="#example-compute-the-distance-and-azimuth-beyween-points-00-and-55" id="toc-example-compute-the-distance-and-azimuth-beyween-points-00-and-55" class="nav-link active" data-scroll-target="#example-compute-the-distance-and-azimuth-beyween-points-00-and-55">Example: Compute the distance and azimuth beyween points (0,0) and (5,5)</a></li>
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<p>Given latitudes and longitudes of P1 and P2 on the ellipsoid, compute the azimuth a12 of the loxodrome P1P2, the arc length s along the loxodrome curve.</p>
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<li><code>lon1, lat1, lon2, lat2</code>: - longitude and latitude of starting and end points (degrees).</li>
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<li><p><code>lon1, lat1, lon2, lat2</code>: - longitude and latitude of starting and end points (degrees).</p></li>
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<li><p><code>a</code> - major axis of the ellipsoid (meters). Default values for WGS84.</p></li>
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<h2 class="anchored" data-anchor-id="example">Example</h2>
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<p>Compute the distance and azimuth beyween points (0,0) and (5,5)</p>
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<pre><code>dist, azim = loxodrome_inverse(0,0,5,5)</code></pre>
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<p>““” function loxodrome_inverse(lon1, lat1, lon2, lat2, a=6378137.0, f=0.0033528106647474805) D2R = pi / 180 lon1 <em>= D2R; lat1 </em>= D2R lon2 <em>= D2R; lat2 </em>= D2R e2 = f * (2 - f)</p>
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<pre><code>isolat1 = isometric_lat(lat1, e2)
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Az12 = atan((lon2 - lon1), (isolat2 - isolat1)) # The azimuth
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lox_s = (m2 - m1) / cos(Az12);
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return lox_s, Az12 / D2R</code></pre>
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<p>end</p>
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<h1>——————————————————————————————————-</h1>
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‎documentation/gdalfuns/loxodrome_inverse.html‎

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<li><a href="#example-compute-the-distance-and-azimuth-beyween-points-00-and-55" id="toc-example-compute-the-distance-and-azimuth-beyween-points-00-and-55" class="nav-link active" data-scroll-target="#example-compute-the-distance-and-azimuth-beyween-points-00-and-55">Example: Compute the distance and azimuth beyween points (0,0) and (5,5)</a></li>
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<p>Compute the distance and azimuth beyween points (0,0) and (5,5)</p>
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‎documentation/gdalfuns/wkt2proj.html‎

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<p>function proj2wkt(proj4_str::String; pretty::Bool=false) !startswith(proj4_str, “+proj=”) &amp;&amp; error(“$(proj4_str) is not a valid proj4 string”) toWKT(importPROJ4(proj4_str), pretty) end</p>
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‎documentation/gdalfuns/xy2lonlat.html‎

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<p>function lonlat2xy(xy::Vector{&lt;:Real}, t_srs_=nothing; t_srs=nothing, s_srs=prj4WGS84) vec(lonlat2xy(reshape(xy[:],1,length(xy)), t_srs_; t_srs=t_srs, s_srs=s_srs)) end lonlat2xy(x::Real, y::Real, t_srs_=nothing; t_srs=nothing, s_srs=prj4WGS84) = lonlat2xy([x y], t_srs_; t_srs=t_srs, s_srs=s_srs)</p>
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<p>function lonlat2xy(xy::Matrix{T}, t_srs_=nothing; t_srs=nothing, s_srs=prj4WGS84) where {T &lt;: Real} (t_srs_ !== nothing) &amp;&amp; (t_srs = t_srs_) isa(s_srs, Int) &amp;&amp; (s_srs = epsg2wkt(s_srs)) isa(t_srs, Int) &amp;&amp; (t_srs = epsg2wkt(t_srs)) (t_srs === nothing) &amp;&amp; error(“Must specify at least the target referencing system.”) opts = (size(xy,2) == 2) ? [“-s_srs”, s_srs, “-t_srs”, t_srs, “-overwrite”] : [“-s_srs”, s_srs, “-t_srs”, t_srs, “-overwrite”, “-dim”, “XYZ”] D = ogr2ogr(xy, opts) return D.data # Return only the array because that’s what was sent in end</p>
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<p>lonlat2xy(D::GMTdataset, t_srs_=nothing; t_srs=nothing, s_srs=prj4WGS84) = lonlat2xy([D], t_srs_; t_srs=t_srs, s_srs=s_srs) function lonlat2xy(D::Vector{&lt;:GMTdataset{T,2}}, t_srs_=nothing; t_srs=nothing, s_srs=prj4WGS84) where {T&lt;:Real} (t_srs_ !== nothing) &amp;&amp; (t_srs = t_srs_) isa(t_srs, Int) &amp;&amp; (t_srs = epsg2wkt(t_srs)) isa(s_srs, Int) &amp;&amp; (s_srs = epsg2wkt(s_srs))</p>
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<p>end</p>
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<pre><code>xy2lonlat(xy::Matrix{&lt;:Real}, s_srs=""; s_srs="", t_srs="+proj=longlat +datum=WGS84")</code></pre>
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<p>or</p>
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<p>Computes the inverse projection from XY to LonLat in the given projection. The output is assumed to be in WGS84. If that isn’t right, pass the appropriate projection info via the <code>t_srs</code> option (PROJ4, WKT, EPSG).</p>
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<li><p><code>xy</code>: The input data. It can be a Matrix, or a <a href="../..\documentation/general/types.html#sec-dataset-type">GMTdataset</a> (or vector of it)</p></li>
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<li><p><code>s_srs</code>: The data projection system. This can be a PROJ4, a WKT string or EPSG code.</p></li>
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