Combining UTM zones into one solid map


I have an area, example 4000m x 4000m. So, 4x4km. The origin can be placed anywhere, maybe in center, maybe on the top-left, nevermind.

Now, I want to fill this area with some stuff from OSM. I read a lot about UTM, zones, etc. UTM quadrant is divided into 6×10 100km squares, this squares are divided into 10×10 10x10km squares, this squares are divided to 10×10 1x1km squares and so on.

Getting back to my 4kmx4km square. How do I convert coordinates to place objects in my square and the position responds to reality?

To make it harder, let’s say that I want to put on the square objects from squares from different UTM quadrants from different zones, for example: most southern-east 1×1 from 34V, most southern-west from 35V, most northern-west from 35U and most northern-east from 35U.

Additional question: Is it possible to create one continuous maps (builded from smaller pieces), which covers the region composed of several UTM zones (for example, from 29W to 34S).

How to translate UTM coordinates properly?

EDIT
Ok, I implement Albers, Lambert and Equidistant projections for some tests. Input args: a = 6378206.4 m, e = 0.00676866, e2 = 0.0822719 Standard parallels: 55.0, 49.0 Origin: 52.205746, 22.514281

And results:

Albers : x = -489.71509; y = -2291.5

Lambert : x = -489.15250; y = -1653.5

Equidistant: x = -489.71533; y = -2289.5

I checked the algorithms and are ok, the results agree with the sample data. What is the reason that the result of the Lambert projection stands out from the rest? Does this mean that Lambert is better to applied to larger areas than the other two?

How to resample a DEM from GCS to UTM with respect to reprojection bounds parameter?


When reprojecting a DEM (e.g., SRTM-derived 1-arc DEM) using PCI Geomatica for example, to constrain pixel size and maintain a square pixel you can either change the image extent or the number of pixels, or both.
What are the implications of changing either parameters with respect to preserving the DEM accuracy?

PostGis: Geometry from UTM text


I have plain data in a postgresql table which looks like this:

╔════╦═══════╦═════════════╦══════════════╦══════════╦═════════════════╗
║ id ║ index ║   easting   ║   northing   ║ utm_zone ║ utm_zone_letter ║
╠════╬═══════╬═════════════╬══════════════╬══════════╬═════════════════╣
║  1 ║   1   ║ 233410.0000 ║ 1024701.0000 ║       38 ║ N               ║
║  1 ║   2   ║ 213310.0000 ║ 1167201.0000 ║       36 ║ N               ║
║  2 ║   1   ║ 213310.0000 ║ 1167201.0000 ║       31 ║ B               ║
║  2 ║   2   ║ 213310.0000 ║ 1167201.0000 ║       31 ║ B               ║
╚════╩═══════╩═════════════╩══════════════╩══════════╩═════════════════╝

Note: Coordinates are not real, but typed by hand

As you can see these are UTM coordinates but stored in plain db type fields.
I want to convert those last 4 columns to one of Geometry type for PostGis.
To something like this:

╔════╦══════════════════════╗
║ id ║       Geometry       ║
╠════╬══════════════════════╣
║  1 ║ 02347237427342342347 ║
║  2 ║ 27584872345646325863 ║
╚════╩══════════════════════╝

I used query similar to this:


--creates polygon with wrong SRID :( 
SELECT z.id, ST_Polygon(z.geom, 3395) geom FROM ( 
    --adds first point of line at the end to close it (requeird by ST_Polygon)
    SELECT l.id id, ST_AddPoint(g.geom, ST_StartPoint(g.geom)) geom FROM (
        -- groups points by ID and creates open line geometry from each group
        SELECT t.id id, ST_MakeLine(t.strPoints) geom FROM (
            --creates POINT(x,y) text from coordinates
            SELECT 
                g.id id, 
                g.index idx, 
                'POINT(' || g.easting || ' ' || g.northing || ')' strPoints
            FROM data g
            ORDER BY g.index
        ) t
        GROUP BY t.id
        HAVING count(t.strPoints) > 2
    ) g

) z
where ST_IsValid(z.geom)

But this does not use utm_zone and utm_zone_letter and points and lines are created without SRID value. Creating polygon from such values and specifing some SRID gives bad results. At same time because points and lines do not have SRID set I cannot use utmzone(geometry) DB function because it requires geometry to have SRID.

I looked at ST_Transform, ST_FromText and other functions but could not find one where I can specify UTM zone number and letter to create Geometry type value.
Creating point without specifying SRID gives me bad results – points fall on penguins in Antarctica which is wrong.

Can you tell me how to convert that data to correct Geometry values with correct SRID specified?

Which EPSG for UTM with 8 digits in QGIS


I have a UTM datasets with 8 digits, so the first digits are 32 (for UTM Zone 32N), but which EPSG should I use to get the data at the right spot in QGIS in a 6 digits system.

If I want to transfer UTM coordinates with 6 digits to 8, I think I could use EPSG 5652 (ETRS89 / UTM zone 32N (N-zE)) but which one I should use to get a 8 digit value to the 6 digits type?

How to work with UTM and multiple zones


I’m totally a newbie with geo tools. I’m using Sharpmap as I’m working with C#.

I have a map where I can put an item on a UTM Location with E,N Zone and number. So the item appears on the desired position.

The problem comes when I want to move the item to a new position. So, for example, I want to increase easting by 2000 meters.

How can I calculate if my item has crossed to a new zone? The easting ranges differ from equator to the poles, am I right? Is there a way to calculate easting ranges of a certain zone?

What is the best way to work with location points in different zones — for example, to calculate distance between them?

What UTM like coordinate system is this?


I have this set of coordinates: 4622580.00000, 503749.00000

They should roughly correlate with 51°01'39.4"N 13°44'44.2"E in Dresden, Germany.

At first I thought they might be UTM, but that puts me off the coast of Somalia. Does anybody have an idea? Or maybe they are UTM but with special options? I am unfortunately not very knowledgeable with coordinate systems.

enter image description here

How does the Buffer app append UTM parameters?


Buffer seems like a great way to link multiple social accounts and conveniently crosspost. There’s plenty of praise on the web for the service, it seems super user friendly, and it looks like it might be the right app for my use case.

But one thing I can’t readily find on the net: How does Buffer add UTM parameters?

A screenshot:

How does Buffer add UTM parameters

What UTM convention does Buffer use? And is there any way to customize this scheme for our particular purposes?

QGIS UTM zones – TIN interpolation plugin


I am trying to add a Z-variable to a vector in order to eventually calculate the volume or the zone using TIN. I was told I first need to set my UTM in order for my Z-variable to be recognized in meters. If my vector spans accross various UTM zones, which ones do I use?

Can't find correct coordinate system: UTM83 Zone 15 forcing input in meters; need it to be read in feet


Forgive me, I’m a CAD person, and am very new to GIS. I’ve searched google and this site extensively for an answer, with no luck.

My problem is that I was given a large number of sistered Raster files; a TIFF and an accompanying .tfw file. The XY coordinates in the .tfw file are given in feet.

I’ve got these images to come in perfectly in CAD by setting the coordinates to UTM83-15 and manually declaring the input coordinates to be feet. It lines up perfectly.

However, when I try to use ArcMap, if I set the zone to UTM83 Zone 15N, it seems to force (logically so, I suppose) the input to be read as meters, which pushes everything ~3.28x up and to the right of where I want it.

I cannot for the life of me find a way to force it to be in feet, nor can I find the same coord system not in metric. Im about to write a script to go through and convert all the X-Y to meteres: an imperfect solution as I don’t really want to manipulate my base data.

To fix this:

  1. Is there a way to force ArcMap to read an input file as feet while using a UTM 15 origin?
  2. Is there a foot based surrogate coordinate system with the same origin for UTM83-15N?

Updating and exporting XY positions in UTM and WGS84 to spreadsheet using ArcGIS ModelBuilder?


On a daily basis I’m editing the geographic positions of various points of a shapefile (corner_XY.shp) by dragging them on my map. When this editing task is done I’m updating the points coordinates in their attribute table column by column by right clicking on the column and calculate geometry.

I have 4 columns: Latitude – Longitude – X_UTM – Y_UTM
Latitude/longitude in WGS84 (format= DD MM SS,SSS) and X_UTM – Y_UTM in WGS84 UTM Zone 15 N.

I’m then exporting the attribute table with the updated fields (Latitude – Longitude – X_UTM – Y_UTM) to an excel spreadsheet to share it with my team.

Exemple of output:

X_UTM        Y_UTM      Latitude            Longitude
596697.989  2276072.78  20° 33' 58.529" N   91° 9' 16.333" W
599675.251  2123364.47  20° 32' 28.838" N   91° 12' 18.624" W
575317.464  2263171.52  20° 23' 51.409" N   91° 6' 35.489" W
....        .....       ......              ......

My project is a projected one in WGS84 UTM Zone 15 N and my shapefile containing the points that I’m moving on a daily basis (corner_XY.shp) is in WGS84 not projected. I’m using ArcGis 10.1.

GOAL: I’m trying to replicate those tasks using the model builder in order to automatically update and export the new position of my points in WGS84 and UTM to an excel spreadsheet.

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